WO2012124208A1 - Light-emitting device, information acquisition device, and object detection device mounted therewith - Google Patents

Light-emitting device, information acquisition device, and object detection device mounted therewith Download PDF

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Publication number
WO2012124208A1
WO2012124208A1 PCT/JP2011/075386 JP2011075386W WO2012124208A1 WO 2012124208 A1 WO2012124208 A1 WO 2012124208A1 JP 2011075386 W JP2011075386 W JP 2011075386W WO 2012124208 A1 WO2012124208 A1 WO 2012124208A1
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WO
WIPO (PCT)
Prior art keywords
housing
light
emitting device
laser
holder
Prior art date
Application number
PCT/JP2011/075386
Other languages
French (fr)
Japanese (ja)
Inventor
信雄 岩月
楳田　勝美
Original Assignee
三洋電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三洋電機株式会社 filed Critical 三洋電機株式会社
Publication of WO2012124208A1 publication Critical patent/WO2012124208A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481—Constructional features, e.g. arrangements of optical elements
    • G01S7/4814—Constructional features, e.g. arrangements of optical elements of transmitters alone
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/4257—Photometry, e.g. photographic exposure meter using electric radiation detectors applied to monitoring the characteristics of a beam, e.g. laser beam, headlamp beam
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • G01J3/0208—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using focussing or collimating elements, e.g. lenses or mirrors; performing aberration correction
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/46—Indirect determination of position data
    • G01S17/48—Active triangulation systems, i.e. using the transmission and reflection of electromagnetic waves other than radio waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/497—Means for monitoring or calibrating
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0052—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1842—Gratings for image generation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/003—Alignment of optical elements
    • G02B7/004—Manual alignment, e.g. micromanipulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/022—Mountings; Housings
    • H01S5/0225—Out-coupling of light
    • H01S5/02253—Out-coupling of light using lenses

Definitions

  • the present invention relates to an object detection device that detects an object in a target region based on a state of reflected light when light is projected onto the target region, an information acquisition device suitable for use in the object detection device, and the object detection device.
  • the present invention relates to a light emitting device to be mounted on.
  • An object detection device using light has been developed in various fields.
  • An object detection apparatus using a so-called distance image sensor can detect not only a planar image on a two-dimensional plane but also the shape and movement of the detection target object in the depth direction.
  • light in a predetermined wavelength band is projected from a laser light source or LED (Light-Emitting-Diode) onto a target area, and the reflected light is received by a light-receiving element such as a CMOS image sensor.
  • CMOS image sensor Light-Emitting-Diode
  • a distance image sensor of a type that irradiates a target region with laser light having a predetermined dot pattern reflected light from the target region of laser light having a dot pattern is received by a light receiving element. Based on the light receiving position of the dot on the light receiving element, the distance to each part of the detection target object (irradiation position of each dot on the detection target object) is detected using triangulation (for example, non-patent) Reference 1).
  • triangulation for example, non-patent
  • a collimator lens and a diffractive optical element can be used to generate laser light having a dot pattern.
  • the collimator lens when the collimator lens is shifted back and forth from the expected position on the optical axis of the laser light source, the spread angle of the laser light after passing through the collimator lens changes. For this reason, the laser beam does not enter the diffractive optical element at a desired spread angle, and the dot size of the dot pattern does not become the expected size. Further, when the optical axis of the collimator lens is shifted from the optical axis of the laser light source, the traveling direction of the laser light after passing through the collimator lens changes. For this reason, the laser light enters the diffractive optical element from an oblique direction, and the irradiation area of the laser light of the dot pattern is shifted from the appropriate position.
  • the dot pattern is not irradiated in a desired irradiation state, which may adversely affect the measurement accuracy.
  • the present invention has been made to solve such a problem, and includes a light emitting device, an information acquisition device, and a device capable of easily and accurately adjusting the position between a laser light source and a collimator lens.
  • An object of the present invention is to provide an object detection device.
  • the first aspect of the present invention relates to a light emitting device.
  • the light-emitting device includes a laser light source, a collimator lens that converts laser light emitted from the laser light source into parallel light, a diffractive optical element on which the laser light converted into parallel light is incident, and the laser A housing for housing the light source, the collimator lens and the diffractive optical element; a first position adjusting unit for adjusting the position of the laser light source in an in-plane direction perpendicular to the emission optical axis of the laser light source; and the collimator A second position adjusting unit for adjusting the position of the collimator lens in a direction parallel to the optical axis of the lens.
  • a second aspect of the present invention relates to an information acquisition apparatus that acquires information on a target area using light.
  • An information acquisition device includes the light-emitting device according to the first aspect and a light-receiving device that receives reflected light reflected from the target region.
  • the third aspect of the present invention relates to an object detection apparatus.
  • the object detection apparatus according to this aspect includes the information acquisition apparatus according to the second aspect.
  • the present invention it is possible to provide a light-emitting device, an information acquisition device, and an object detection device equipped with the light-emitting device that can easily and accurately adjust the position between the laser light source and the collimator lens. .
  • an information acquisition device of a type that irradiates a target area with laser light having a predetermined dot pattern is exemplified.
  • FIG. 1 shows a schematic configuration of the object detection apparatus according to the present embodiment.
  • the object detection device includes an information acquisition device 1 and an information processing device 2.
  • the television 3 is controlled by a signal from the information processing device 2.
  • the information acquisition device 1 projects infrared light over the entire target area and receives the reflected light with a CMOS image sensor, whereby the distance between each part of the object in the target area (hereinafter referred to as “three-dimensional distance information”). To get.
  • the acquired three-dimensional distance information is sent to the information processing apparatus 2 via the cable 4.
  • the information processing apparatus 2 is, for example, a controller for TV control, a game machine, a personal computer, or the like.
  • the information processing device 2 detects an object in the target area based on the three-dimensional distance information received from the information acquisition device 1, and controls the television 3 based on the detection result.
  • the information processing apparatus 2 detects a person based on the received three-dimensional distance information and detects the movement of the person from the change in the three-dimensional distance information.
  • the information processing device 2 is a television control controller
  • the information processing device 2 detects the person's gesture from the received three-dimensional distance information and outputs a control signal to the television 3 in accordance with the gesture.
  • the application program to be installed is installed.
  • the user can cause the television 3 to execute a predetermined function such as channel switching or volume up / down by making a predetermined gesture while watching the television 3.
  • the information processing device 2 when the information processing device 2 is a game machine, the information processing device 2 detects the person's movement from the received three-dimensional distance information, and displays a character on the television screen according to the detected movement.
  • An application program that operates and changes the game battle situation is installed. In this case, the user can experience a sense of realism in which he / she plays a game as a character on the television screen by making a predetermined movement while watching the television 3.
  • FIG. 2 is a diagram showing the configuration of the information acquisition device 1 and the information processing device 2.
  • XYZ axes orthogonal to each other are attached to indicate directions related to the projection optical system 100 and the light receiving optical system 200.
  • the information acquisition apparatus 1 includes a projection optical system 100 and a light receiving optical system 200 as a configuration of an optical unit.
  • the projection optical system 100 and the light receiving optical system 200 are arranged in the information acquisition apparatus 1 so as to be aligned in the Z-axis direction.
  • the projection optical system 100 includes a laser light source 110, a collimator lens 120, a rising mirror 130, and a diffractive optical element (DOE: Diffractive Optical Element) 140.
  • the light receiving optical system 200 includes a filter 210, an aperture 220, an imaging lens 230, and a CMOS image sensor 240.
  • the information acquisition device 1 includes a CPU (Central Processing Unit) 21, a laser driving circuit 22, an imaging signal processing circuit 23, an input / output circuit 24, and a memory 25 as a circuit unit.
  • CPU Central Processing Unit
  • the laser light source 110 outputs laser light in a narrow wavelength band with a wavelength of about 830 nm in a direction away from the light receiving optical system 200 (Z-axis positive direction).
  • the collimator lens 120 converts the laser light emitted from the laser light source 110 into light slightly spread from parallel light (hereinafter simply referred to as “parallel light”).
  • the raising mirror 130 reflects the laser beam incident from the collimator lens 120 side in the direction toward the DOE 140 (Y-axis positive direction).
  • the DOE 140 has a diffraction pattern on the incident surface. Due to the diffraction effect of the diffraction pattern, the laser light incident on the DOE 140 is converted into a dot pattern laser light and irradiated onto the target region.
  • the diffraction pattern has, for example, a structure in which a step type diffraction hologram is formed in a predetermined pattern. The diffraction hologram is adjusted in pattern and pitch so as to convert the laser light converted into parallel light by the collimator lens 120 into laser light of a dot pattern.
  • the DOE 140 irradiates the target region with the laser beam incident from the rising mirror 130 as a laser beam having a dot pattern that spreads radially.
  • the size of each dot in the dot pattern depends on the beam size of the laser light when entering the DOE 140.
  • Laser light (0th order light) that is not diffracted by the DOE 140 passes through the DOE 140 and travels straight.
  • the laser light reflected from the target area enters the imaging lens 230 via the filter 210 and the aperture 220.
  • the filter 210 is a band-pass filter that transmits light in a wavelength band including the emission wavelength (about 830 nm) of the laser light source 110 and cuts the wavelength band of visible light.
  • the aperture 220 stops the light from the outside so as to match the F number of the imaging lens 230.
  • the imaging lens 230 condenses the light incident through the aperture 220 on the CMOS image sensor 240.
  • the CMOS image sensor 240 receives the light collected by the imaging lens 230 and outputs a signal (charge) corresponding to the amount of received light to the imaging signal processing circuit 23 for each pixel.
  • the output speed of the signal is increased so that the signal (charge) of the pixel can be output to the imaging signal processing circuit 23 with high response from the light reception in each pixel.
  • the CPU 21 controls each unit according to a control program stored in the memory 25.
  • the CPU 21 is provided with the functions of a laser control unit 21a for controlling the laser light source 110 and a distance calculation unit 21b for generating three-dimensional distance information.
  • the laser drive circuit 22 drives the laser light source 110 according to a control signal from the CPU 21.
  • the imaging signal processing circuit 23 controls the CMOS image sensor 240 and sequentially takes in the signal (charge) of each pixel generated by the CMOS image sensor 240 for each line. Then, the captured signals are sequentially output to the CPU 21. Based on the signal (imaging signal) supplied from the imaging signal processing circuit 23, the CPU 21 calculates the distance from the information acquisition device 1 to each part of the detection target by processing by the distance calculation unit 21b.
  • the input / output circuit 24 controls data communication with the information processing apparatus 2.
  • the information processing apparatus 2 includes a CPU 31, an input / output circuit 32, and a memory 33.
  • the information processing apparatus 2 has a configuration for performing communication with the television 3 and for reading information stored in an external memory such as a CD-ROM and installing it in the memory 33.
  • an external memory such as a CD-ROM
  • the configuration of these peripheral circuits is not shown for the sake of convenience.
  • the CPU 31 controls each unit according to a control program (application program) stored in the memory 33.
  • a control program application program
  • the CPU 31 is provided with the function of the object detection unit 31a for detecting an object in the image.
  • a control program is read from a CD-ROM by a drive device (not shown) and installed in the memory 33, for example.
  • the object detection unit 31a detects a person in the image and its movement from the three-dimensional distance information supplied from the information acquisition device 1. Then, a process for operating the character on the television screen according to the detected movement is executed by the control program.
  • the object detection unit 31 a detects a person in the image and its movement (gesture) from the three-dimensional distance information supplied from the information acquisition device 1. To do. Then, processing for controlling functions (channel switching, volume adjustment, etc.) of the television 3 is executed by the control program in accordance with the detected movement (gesture).
  • the input / output circuit 32 controls data communication with the information acquisition device 1.
  • FIG. 3A is a diagram schematically showing the irradiation state of the laser light on the target region
  • FIG. 3B is a diagram schematically showing the light receiving state of the laser light in the CMOS image sensor 240.
  • FIG. 6B shows a light receiving state when a flat surface (screen) exists in the target area.
  • laser light having a dot pattern (hereinafter, the entire laser light having this pattern is referred to as “DP light”) is irradiated onto the target area.
  • DP light laser light having a dot pattern
  • the light flux region of DP light is indicated by a solid line frame.
  • dot regions (hereinafter simply referred to as “dots”) in which the intensity of the laser light is increased by the diffraction action by the DOE 140 are scattered according to the dot pattern by the diffraction action by the DOE 140.
  • the light beam of DP light is divided into a plurality of segment regions arranged in a matrix.
  • dots are scattered in a unique pattern.
  • the dot dot pattern in one segment area is different from the dot dot pattern in all other segment areas.
  • each segment area can be distinguished from all other segment areas with a dot dot pattern.
  • the segment areas of DP light reflected thereby are distributed in a matrix on the CMOS image sensor 240 as shown in FIG.
  • the light in the segment area S0 on the target area shown in FIG. 11A is incident on the segment area Sp shown in FIG.
  • the light flux region of DP light is indicated by a solid frame, and for convenience, the light beam of DP light is divided into a plurality of segment regions arranged in a matrix.
  • the position of each segment area on the CMOS image sensor 240 is detected, and the position corresponding to each segment area of the detection target object is determined based on the triangulation method from the detected position of each segment area.
  • the distance to is detected. Details of such a detection technique are described in, for example, Non-Patent Document 1 (The 19th Annual Conference of the Robotics Society of Japan (September 18-20, 2001), Proceedings, P1279-1280).
  • the laser light source 110 and the collimator lens 120 are arranged so that the optical axes of both coincide.
  • the arrangement of the laser light source 110 and the collimator lens 120 in the optical axis direction is adjusted so that the light emission point of the laser light source 110 is slightly displaced from the focal position of the collimator lens 120 to the collimator lens 120 side.
  • the DOE 140 is arranged such that the incident surface (the surface on which the diffraction pattern is formed) is perpendicular to the Y axis in FIG.
  • the laser light is incident on the DOE 140 such that the light beam slightly spreads from the parallel light and the optical axis is perpendicular to the incident surface of the DOE 140.
  • DP light having a desired dot pattern is irradiated onto a desired range of the target area.
  • the installation positions of the laser light source 110 and the collimator lens 120 are shifted, the optical axes of the laser light source 110 and the collimator lens 120 are shifted, or the light emission point of the laser light source 110 is shifted from the intended position. Accordingly, the irradiation state of the DP light in the target region changes.
  • the spread angle of the laser light after passing through the collimator lens 120 changes. For this reason, the laser beam does not enter the DOE 140 at a desired spread angle, and the size of the DP light dot in the target region does not become the expected size.
  • the dot changes in this way, the dot pattern for the position detection of the segment area is not properly verified.
  • the traveling direction of the laser light after passing through the collimator lens 120 is inclined with respect to the optical axis of the collimator lens 120.
  • the laser light enters the DOE 140 from an oblique direction, and the irradiation range of the DP light in the target area is shifted from the imaging range of the light receiving optical system 200.
  • object detection may not be performed properly.
  • a configuration for easily adjusting the relative positions of the laser light source 110 and the collimator lens 120 along the X-axis, Y-axis, and Z-axis directions during manufacturing Is provided in the light emitting device 10 shown below.
  • FIG. 4 is an exploded perspective view showing a configuration example of the light emitting device 10 according to the present embodiment.
  • the light emitting device 10 is a device in which the projection optical system 100 in FIG. 2 is unitized together with other components.
  • FIG. 4A shows the front, rear, left, right, and up and down directions along with the XYZ axes shown in FIG. The vertical direction is parallel to the Y-axis direction, the horizontal direction is parallel to the X-axis direction, and the front-back direction is parallel to the Z-axis direction.
  • the light emitting device 10 includes a laser holder 111, a lens holder 121, and a DOE holder in addition to the laser light source 110, the collimator lens 120, the rising mirror 130, and the DOE 140 described above. 141, a housing 150, and a pressing spring 160 are provided.
  • the laser light source 110 has a base 110a and a CAN 110b.
  • the base 110a has a circular outline with a part of the outer periphery cut out when viewed from the front.
  • the collimator lens 120 has a large diameter portion 120a having a cylindrical outer peripheral surface and a small diameter portion 120b having a diameter smaller than that of the large diameter portion.
  • the laser holder 111 is a frame member having a square outline in a front view and having a circular opening 111a formed at the center.
  • the opening 111a penetrates the laser holder 111 in the front-rear direction, and has a configuration in which two cylindrical holes having different diameters are arranged on the same axis.
  • the diameter of the hole in front of the opening 111a is larger than the diameter of the hole in the rear, and a ring-shaped step is formed at the boundary where the diameter changes.
  • the diameter of the hole in front of the opening 111a is slightly larger than the diameter of the base 110a of the laser light source 110.
  • the laser light source 110 is positioned with respect to the laser holder 111 by fitting the base 110a into the opening 111a from the front side until the rear surface of the base 110a of the laser light source 110 contacts the step in the opening 111a. In this state, an adhesive is injected into the cutout on the outer periphery of the base 110 a, and the laser light source 110 is bonded and fixed to the laser holder 111.
  • the laser holder 111 is made of a material having high thermal conductivity such as zinc, and is manufactured by general die casting.
  • step portions 111 b that are one step higher than the other portions are formed on the outer peripheral portion of the back surface of the laser holder 111.
  • the four step portions 111b have the same height and the same shape.
  • the end faces in the height direction of the four step portions 111b are all parallel to the XY plane.
  • the position of the laser light source 110 is adjusted by displacing the laser holder 111 in the in-plane direction of the XY plane while the stepped portion 111b is in contact with the outer surface of the housing 150. At this time, since the contact area between the step portion 111b and the outer surface of the housing 150 is small, the laser holder 111 can be displaced smoothly.
  • die for laser holder 111 can be adjusted easily by providing the four step parts 111b in this way can also be show
  • the lens holder 121 is formed of a frame member having a substantially circular outline in a front view and having an opening 121a formed at the center.
  • the opening 121a penetrates the lens holder 121 in the front-rear direction, and has a configuration in which two cylindrical holes having different diameters are arranged on the same axis.
  • the diameter of the hole in front of the opening 121a is larger than the diameter of the hole in the rear, and a ring-shaped step is formed at the boundary where the diameter changes.
  • the diameter of the hole in front of the opening 121a is slightly larger than the diameter of the large diameter portion 120a of the collimator lens 120.
  • the collimator lens 120 is positioned with respect to the lens holder 121 by fitting the large diameter portion 120a into the opening 121a from the front side until the rear surface of the large diameter portion 120a of the collimator lens 120 contacts the step in the opening 121a. In this state, the collimator lens 120 is bonded and fixed to the lens holder 121.
  • a recess 121c extending in the front-rear direction is formed on the upper surface of the lens holder 121.
  • a convex part 121d extending in the front-rear direction is formed in the concave part 121c.
  • two grooves 121 b are formed on the side surfaces of the lens holder 121 for allowing an adhesive to flow in when the collimator lens 120 and the lens holder 121 are bonded and fixed.
  • a rectangular groove 121e extending linearly in the left-right direction (X-axis direction) is formed on the lower surface of the lens holder 121 (see FIG. 5B).
  • the groove 121e is used when the position of the lens holder 121 is adjusted in the front-rear direction (Z-axis direction).
  • the center of the convex part 121d and the center of the groove 121e in the circumferential direction of the lens holder 121 are in a state shifted from each other by 180 degrees. Therefore, when the convex portion 121d faces right above, the groove 121e turns right below.
  • the DOE holder 141 has a step (not shown) for mounting the DOE 140 on the lower surface.
  • an opening 141 a for guiding the laser beam to the target area is formed in the center of the DOE holder 141.
  • the DOE 140 is fitted into the DOE holder 141 from below the DOE holder 141, and is fixed by adhesion.
  • step portions 141 b for fixing the DOE holder 141 to the housing 150 are formed at the left and right ends of the DOE holder 141.
  • the housing 150 is formed of a bottomed frame member having a rectangular outline in a top view.
  • the housing 150 has a symmetrical shape with respect to a plane parallel to the YZ plane, except for the shape of the screw hole 150i.
  • the housing 150 is made of a material having high thermal conductivity such as aluminum, and is manufactured by general die casting.
  • a mirror mounting portion 150a inclined by 45 ° in the in-plane direction of the YZ plane is formed on the inner rear side of the housing 150.
  • the rising mirror 130 is mounted on the mirror mounting portion 150a and fixed by adhesion.
  • a U-shaped opening 150 b is formed on the front side surface of the housing 150.
  • the width of the opening 150b in the left-right direction is larger than the diameter of the CAN 110b of the laser light source 110.
  • 150b since the housing 150 is manufactured by die casting, 150b is movable to remove the housing 150 from the mold when it is U-shaped rather than circular. A piece is not required, and the manufacturing cost can be reduced.
  • a hole 150c for guiding a Z-axis adjusting jig 601 described later to the groove 121e of the lens holder 121 is formed (see FIG. 5B).
  • the diameter of the hole 150c is larger than the width of the groove 121e of the lens holder 121 in the Z-axis direction.
  • Two holes 150e for allowing the UV adhesive to flow into the interior of the housing 150 are formed in the two side surfaces of the housing 150 in the left-right direction.
  • a pair of inclined surfaces 150d facing each other are formed at the lower ends of the two inner side surfaces of the housing 150 in the left-right direction.
  • the two inclined surfaces 150d are inclined at the same angle in the downward direction with respect to the plane parallel to the XZ plane.
  • a step 150f for mounting the DOE holder 141 and four screw holes 150g are formed on the upper surface of the housing 150.
  • the width of the step portion 150f in the Z-axis direction is slightly larger than the width of the left and right step portions 141b of the DOE holder 141.
  • Two flanges 150 h projecting in the outer direction of the housing 150 are formed at the lower ends of the two outer surfaces aligned in the left-right direction of the housing 150.
  • Each of the two flanges 150h is formed with a screw hole 150i for fixing the housing 150 to the base plate 300 described later.
  • the holding spring 160 is a leaf spring having a spring property, and has a step portion 160a that is one step lower in the center.
  • the holding spring 160 has a symmetrical shape.
  • the presser spring 160 is formed with four screw holes 160b for fixing the presser spring 160 to the housing 150 from above.
  • the rising mirror 130 is mounted on the mirror mounting portion 150 a in the housing 150. Accordingly, the rising mirror 130 is installed in the housing 150 so as to have an inclination of 45 degrees in the in-plane direction of the YZ plane with respect to the XZ plane.
  • the lens holder 121 on which the collimator lens 120 is mounted is placed on the pair of inclined surfaces 150d so that the grooves 121e and the holes 150c are aligned, and is accommodated inside the housing 150.
  • the groove 121e and the hole 150c can be aligned by placing the lens holder 121 on the inclined surface 150d so that the convex portion 121d faces right above.
  • the pressing spring 160 is applied to the upper portion of the housing 150 so that the four screw holes 160b of the pressing spring 160 are aligned with the four screw holes 150g of the housing 150.
  • four screws 161 are screwed into the four screw holes 150g from above through the four screw holes 160b.
  • the convex portion 121 d of the lens holder 121 is pressed downward by the step portion 160 a of the pressing spring 160.
  • the lens holder 121 is pressed against the inclined surface 150d of the housing 150 by the urging force of the holding spring 160, and is temporarily fixed so as not to move in the X-axis direction (left-right direction) and the Y-axis direction (up-down direction). .
  • the convex portion 121d When the holding spring 160 is mounted on the housing 150, the convex portion 121d is positioned in the middle of the stepped portion 160a, and the holding spring 160 bends evenly from side to side about the stepped portion 160a. For this reason, the lens holder 121 is less likely to be displaced in the circumferential direction. If the convex portion 121d is displaced from the middle of the step portion 160a, the lens holder 121 can be rotated in the circumferential direction so that the convex portion 121d is positioned in the middle of the step portion 160a with the convex portion 121d as a mark. That's fine. Thereby, the groove
  • the rear surface of the laser holder 111 is brought into contact with the outer surface of the housing 150 so that the CAN 110b of the laser light source 110 is inserted into the U-shaped opening 150b of the housing 150.
  • the three steps 111b excluding the upper step 111b among the steps 111b of the laser holder 111 shown in FIG. A predetermined gap exists between the CAN 110b of the laser light source 110 and the opening 150b of the housing 150 so that the laser light source 110 can move in the XY axis direction (up / down / left / right direction).
  • the positional relationship between the laser holder 111 and the housing 150 will be described later with reference to FIGS.
  • the laser light source 110 is displaced in the XY axis direction (up / down / left / right direction), and the XY axis direction (up / down / left / right direction). ) Is adjusted. As a result, the optical axis of the laser light source 110 and the optical axis of the collimator lens 120 are aligned. Further, a Z-axis adjusting jig (not shown in FIG.
  • the UV adhesive is evenly attached to the boundary between the two left and right side surfaces of the laser holder 111 and the side surface of the housing 150. After the UV adhesive is attached, the deviation of the optical axis of the laser light is confirmed again. If there is no problem, the UV adhesive is irradiated with ultraviolet rays, and the laser holder 111 is bonded and fixed to the housing 150. If there is a problem in confirming the deviation of the optical axis of the laser beam, the laser holder 111 is finely adjusted again, and then the UV adhesive is irradiated with ultraviolet rays, and the laser holder 111 is bonded and fixed to the housing 150. Is done.
  • the UV adhesive is evenly attached to the left and right at the positions where the lens holder 121 and the inclined surface 150d inside the housing 150 are in contact with each other through the holes 150e formed on the left and right side surfaces of the housing 150.
  • the positional relationship between the laser light source 110 and the collimator lens 120 is confirmed again. If there is no problem, the UV adhesive is irradiated with ultraviolet rays, and the lens holder 121 is bonded and fixed to the housing 150. . If there is a problem in confirming the positional relationship between the laser light source 110 and the collimator lens 120, the lens holder 121 is finely adjusted again, and then the UV adhesive is irradiated with ultraviolet rays. Adhered and fixed to.
  • the hole 150e is formed on the side surface of the housing 150, the lens holder 121 housed in the housing 150 can be easily bonded and fixed to the housing 150.
  • FIG. 5A is a perspective view of the light emitting device 10 viewed from above
  • FIG. 5B is a perspective view of the light emitting device 10 viewed from below.
  • FIG. 6 to 8 are perspective views showing an assembling process of the information acquisition device 1. For convenience, the assembly process of the light receiving device 20 and the mounting process of the light receiving device 20 to the base plate 300 are not shown.
  • the light receiving device 20 is a device in which the light receiving optical system 200 in FIG. 2 is unitized with other components.
  • reference numeral 300 denotes a base plate that supports the light emitting device 10 and the light receiving device 20.
  • the light emitting device 10 and the light receiving device 20 are arranged on the base plate 300.
  • the base plate 300 has a rectangular plate shape, and is made of a material having excellent flexibility resistance and high thermal conductivity such as stainless steel.
  • Two screw holes 300 a for fixing the light emitting device 10 to the base plate 300 are formed in the base plate 300.
  • the base plate 300 is formed with a step portion 301 that determines the installation position of the light emitting device 10.
  • the installation position of the light emitting device 10 is set in advance so that the light emitting center of the light emitting device 10 and the light receiving center of the light receiving device 20 are aligned in the Z-axis direction.
  • the installation interval between the light emitting device 10 and the light receiving device 20 is set according to the distance between the information acquisition device 1 and the reference plane of the target area.
  • the distance between the reference plane and the information acquisition apparatus 1 varies depending on how far away the target is to be detected. The closer the distance to the target to be detected is, the narrower the interval between the light emitting device 10 and the light receiving device 20 is. Conversely, as the distance to the target to be detected increases, the installation interval between the light emitting device 10 and the light receiving device 20 increases.
  • the hole 302 for taking out the wiring of the laser light source 110 to the back part of the base plate 300 is formed in the center lower part of the base plate 300.
  • an opening 303 for exposing the connector 202 of the light receiving device 20 to the back portion of the base plate 300 is formed below the installation position of the light receiving device 20 on the base plate 300.
  • a flange 304 is formed in the base plate 300, and a screw hole 304 a for fixing a cover 400 described later to the base plate 300 is formed in the flange 304.
  • the light receiving device 20 includes a filter 210, an aperture 220, an imaging lens 230, and a CMOS image sensor 240 as shown in FIG.
  • the light receiving device 20 is fixed to the base plate 300 by the substrate fixing unit 201.
  • the connector 202 of the light receiving device 20 is exposed on the back surface of the base plate 300 through an opening 303 formed in the base plate 300.
  • the light emitting device 10 is arranged so that the side surface of the housing 150 abuts on the step portion 301 of the base plate 300. In this state, the two screw holes 300a and the two screw holes 150i are combined, and the two screws 305 are screwed into the screw holes 150i and the screw holes 300a, respectively. Thereby, the light emitting device 10 is fixed to the base plate 300.
  • FIG. 8A is a perspective view of the structure viewed from the front
  • FIG. 8B is a perspective view of the structure viewed from the back.
  • a projection window 401 for guiding the light emitted from the light emitting device 10 to the target and a light receiving window 402 for guiding the reflected light from the target to the light receiving device 20 are formed on the front surface of the cover 400.
  • a circuit board 500 is further installed on the back surface of the base plate 300 (not shown).
  • the laser light source 110 is connected to the circuit board 500 through a hole 302 formed in the back portion of the base plate 300.
  • the circuit board 500 is connected to the connector 202 of the light receiving device 20 through an opening 303 formed in the back portion of the base plate 300.
  • the circuit board 500 is mounted with a circuit unit of the information acquisition device 1 such as the CPU 21 and the laser driving circuit 22 shown in FIG.
  • FIG. 9 and FIG. 10 are diagrams for explaining the positional relationship of each member inside the housing 150.
  • 9A is a top view of the light-emitting device 10
  • FIG. 9B is a cross-sectional view taken along the line AA of FIG. 9A.
  • 10A is a side view of the light-emitting device 10
  • FIG. 10B is a cross-sectional view taken along the line BB of FIG. 10A.
  • the lens holder 121 has a predetermined gap between the DOE holder 141 and the mirror mounting portion 150a in the positive Z-axis direction (broken line in the figure).
  • the lens holder 121 has a predetermined gap between the inner surface of the housing 150 that contacts the laser holder 111 in the negative Z-axis direction (broken line in the figure).
  • the step portion 160a of the holding spring 160 has a smaller width than the concave portion 121c of the lens holder 121, and a predetermined gap exists between the step portion 160a and the lens holder 121 (broken line in the figure).
  • the lens holder 121 since the lens holder 121 is in contact with the inclined surface 150d in the negative Y-axis direction and is pressed by the step portion 160a of the pressing spring 160 from the positive Y-axis direction, it does not move in the Y-axis direction. . Since the lens holder 121 has a substantially circular cross section in the XY plane, the contact area between the lens holder 121 and the inclined surface 150d is small, and the frictional force generated between the lens holder 121 and the inclined surface 150d is small.
  • the pressing spring 160 contacts the convex portion 121d on the upper surface of the lens holder 121 and the contact area between the pressing spring 160 and the convex portion 121d is small, the frictional force generated between the pressing spring 160 and the convex portion 121d is small.
  • the pressing spring 160 is urged against the inclined surface 150 d of the housing 150 and is smooth and stable in the Z-axis direction.
  • the lens holder 121 can be moved.
  • the lower step portion 111b of the laser holder 111 is in contact with the outer surface of the housing 150 where the U-shaped opening 150b is formed.
  • the CAN 110b of the laser light source 110 attached to the laser holder 111 has a predetermined gap between the inner surface of the U-shaped opening 150b of the housing 150 in the negative Y-axis direction (in the drawing). Dashed line).
  • the left and right step portions 111b of the laser holder 111 are in contact with the outer surface of the housing 150 where the U-shaped opening 150b is formed.
  • the CAN 110b of the laser light source 110 attached to the laser holder 111 has a predetermined gap between the inner surface of the U-shaped opening 150b of the housing 150 in the X-axis positive direction and the X-axis negative direction. (Dashed line in the figure).
  • FIG. 11 is a schematic diagram for explaining a method of adjusting the lens holder 121 in the Z-axis direction.
  • FIG. 10A is a perspective view of the housing 150 as viewed from the back
  • FIG. 10B is a diagram showing the relationship between the rotation of the eccentric pin 601a and the force applied to the lens holder 121
  • FIG. It is AA sectional drawing in (a). For convenience, hatching is omitted in FIG.
  • FIG. 11A shows a Z-axis adjustment jig 601 for adjusting the lens holder 121 in the Z-axis direction.
  • the Z-axis adjustment jig 601 has a cylindrical shape whose diameter is smaller than that of the hole 150c of the housing 150, and an eccentric pin at a position deviated from the center of rotation of the Z-axis adjustment jig 601 on the front end surface. 601a protrudes.
  • the eccentric pin 601a has a cylindrical shape with a diameter smaller than the width of the groove 121e in the Z-axis direction.
  • the Z-axis adjustment jig 601 inserts the eccentric pin 601a of the Z-axis adjustment jig 601 into the groove 121e of the lens holder 121 through the hole 150c formed in the back portion of the housing 150. And fit.
  • the eccentric pin 601a When the Z-axis adjustment jig 601 is rotated in the direction of the dotted arrow in this state, the eccentric pin 601a is centered on the rotation axis of the Z-axis adjustment jig 601 as shown in FIG. It rotates (dotted line in the figure). As the eccentric pin 601a rotates, the eccentric pin 601a pushes the groove 121e in the Z-axis negative direction, and the lens holder 121 is moved in the Z-axis negative direction. At this time, since the eccentric pin 601a rotates in a circular orbit, a force is also generated in the X-axis direction. As described above, the lens holder 121 moves in the X-axis direction by contacting the inclined surface 150d.
  • the eccentric pin 601a Since it is regulated, it is not moved in the X-axis direction. Since the eccentric pin 601a has a diameter (about half) sufficiently smaller than the width of the groove 121e, a force in the X-axis direction with respect to the lens holder 121 is not greatly applied, and the Z-axis adjustment jig 601 is smoothly rotated. be able to.
  • the groove 121e formed in the lens holder 121 is positioned at the diameter of the hole 150c, and the groove 121e is the hole 150c. It is desirable to face the outside from the hole 150c over the entire length of the diameter.
  • at least the length of the groove 121e in the X-axis direction needs to be larger than the diameter of the circular orbit of the eccentric pin 601a (the middle dotted line in FIG. 5B). is there.
  • the Z-axis adjusting jig 601 is fitted in the groove 121e of the lens holder 121 and rotated in the direction of the dotted arrow, so that the position of the lens holder 121 is changed to the positive / negative of the Z-axis. It is possible to adjust in the direction (arrow direction in the figure). In this way, the distance between the laser light source 110 and the collimator lens 120 can be easily adjusted.
  • FIG. 12 is a schematic diagram for explaining a method of adjusting the laser holder 111 in the X-axis direction and the Y-axis direction.
  • FIG. 4A is a diagram for explaining an adjustment method in the Y-axis direction
  • FIG. 4B is a diagram for explaining an adjustment method in the X-axis direction.
  • 12A is a cross-sectional view taken along the line AA in FIG. 9A
  • FIG. 12B is a cross-sectional view taken along the line BB in FIG. 10A.
  • hatches are omitted from FIGS. 12 (a) and 12 (b).
  • the stepped portion 111b of the laser holder 111 is in contact with the outer surface of the housing 150 where the opening 150b is formed.
  • the laser holder 111 is pressed against the outer surface of the housing 150 from above (Z-axis negative direction) in the figure, while in the Y-axis direction (FIG. (a) arrow direction) and the X-axis direction (arrow direction in FIG. 12B).
  • the optical axis of the laser light source 110 and the collimator lens 120 may be match
  • the XY axis adjustment jig uses a precision stage that can be driven by the XYZ axes, or a combination of a precision stage that can be driven by the XY axes and a mechanism that has a spring property in the Z axis direction. Is used.
  • the position adjustment of the laser light source 110 and the collimator lens 120 is performed, for example, by driving the laser light source 110 and emitting the laser light before the DOE holder 141 is mounted on the housing 150, and then reflected by the mirror 130. This is done by measuring the beam of laser light.
  • the laser holder 111 is adjusted in the X and Y axis directions so that the beam profile of the laser beam is the best.
  • the position adjustment of the collimator lens 120 in the Z-axis direction is performed so that the beam size of the laser beam becomes the best.
  • the DOE holder 141 is attached to the housing 150.
  • the position of the laser light source 110 can be easily adjusted in the X-axis direction and the Y-axis direction, and the collimator lens 120 can be easily adjusted in the Z-axis direction. Thereby, even when the installation positions of the collimator lens 120 and the laser light source 110 are shifted, the position can be adjusted easily with high accuracy.
  • the lens holder 121 has a substantially circular cross section in the XY plane, the contact area between the lens holder 121 and the inclined surface 150d is small, and the frictional force generated between the lens holder 121 and the inclined surface 150d is small. Further, since the step portion 160a of the pressing spring 160 is pressed against the convex portion 121d, the contact area between the convex portion 121d and the step portion 160a is small, and the frictional force generated between the lens holder 121 and the pressing spring 160 is small. Therefore, the lens holder 121 can be moved smoothly and stably in the Z-axis direction while the lens holder 121 is pressed against the inclined surface 150d of the housing 150 by the urging of the holding spring 160.
  • the lens holder 121 is accommodated in the housing 150 so that the convex part 121d extending in the front-rear direction faces upward, and as shown in FIG. 5B, the hole 150c and the groove 121e Can be matched. Further, when the pressing spring 160 is mounted on the housing 150, the pressing spring 160 bends evenly on the left and right with the convex portion 121d as the apex, so that the displacement of the lens holder 121 in the circumferential direction can be suppressed.
  • the step portion 111b is provided on the back surface of the laser holder 111, the contact range between the laser holder 111 and the outer surface of the housing 150 can be limited, and the laser holder 111 in the XY axis direction. Can be adjusted smoothly and stably.
  • the opening 150b of the housing 150 is formed in a U-shape, the housing 150 can be easily detached from the mold in die casting. Therefore, manufacturing cost can be reduced.
  • the position of the collimator lens 120 can be adjusted by a simple operation of engaging the eccentric pin 601a with the groove 121e and rotating it.
  • the optical system of the light emitting device 10 is configured such that the optical path of the laser light emitted from the laser light source 110 is bent by the rising mirror 130, but the laser emitted from the laser light source 110 is shown.
  • the light path may be configured to be directed to the DOE 140 without being bent.
  • the raising mirror 130 becomes unnecessary, and for example, an opening and a DOE are installed at the position of the raising mirror 130.
  • the eccentric pin 601a has a diameter that is about half the width of the groove 121e, but may have a diameter that is about the same as the width of the groove 121e.
  • channel 121e was linear, curved shape, such as a circle
  • the position where the optical axis of the laser light source 110 and the optical axis of the collimator lens 120 coincide with each other is the desired installation position of the laser light source 110 in the XY axis direction.
  • a position where the optical axis is shifted from the optical axis of the collimator lens 120 by a predetermined distance in a predetermined direction may be an intended installation position of the laser light source 110 in the XY axis direction.
  • the number of the step portions 111b is four. However, at least three step portions 111b may be in contact with the outer surface (front surface) of the housing 150, and the number of step portions 111b is three, or five or more. It may be formed. Alternatively, the rear surface of the laser holder 111 and the front surface of the housing 150 may be brought into surface contact without forming the stepped portion 111b. However, in this case, it is necessary to considerably improve the surface accuracy of the rear surface of the laser holder 111 and the front surface of the housing 150.
  • the outer surface of the lens holder 121 is substantially circular over the entire circumference, but only the portion of the lens holder that contacts the inclined surface 150d, such as circular only the bottom of the lens holder 121, is used. May be circular.
  • the portion of the lens holder that contacts the inclined surface 150d does not necessarily have to be circular, and may have a curved shape that is symmetrical in the left-right direction.
  • the pair of inclined surfaces 150d are formed in the housing 150.
  • two or more pairs of inclined surfaces 150d may be formed in the housing 150.
  • the number of surfaces and the number of right inclined surfaces may be different.
  • the inclination angle of the left inclined surface 150d may be different from the inclination angle of the right inclined surface 150d.
  • the inclined surface 150d may have another configuration as long as it can support the lens holder 121 so that the movement of the lens holder 121 in the X-axis direction is restricted.
  • the groove 121e is formed directly below (bottommost part) of the lens holder 121 and the hole 150c is formed at the bottom of the housing 150.
  • the position of the hole 150c is not limited to this.
  • the hole 150c is formed on the left and right side surfaces of the housing 150
  • the groove 121e is formed on the left and right side surfaces of the lens holder 121 so that the groove 121e faces the outside from the hole 150c. You may form in.
  • the hole 150c is circular as shown in FIG. 5 (b), but the hole 150c may have other shapes such as a square or rhombus.
  • the hole 150c is a square, one side of the square is preferably set slightly larger than the diameter of the Z-axis adjusting jig 601.
  • the diameter of the hole 150c is preferably set slightly larger than the diameter of the Z-axis adjusting jig 601. If it carries out like this, since the outer periphery of the Z-axis adjustment jig
  • the CMOS image sensor 240 is used as the light receiving element, but a CCD image sensor can be used instead. Furthermore, the configuration of the light receiving optical system 200 can be changed as appropriate.
  • the information acquisition device 1 and the information processing device 2 may be integrated, or the information acquisition device 1 and the information processing device 2 may be integrated with a television, a game machine, or a personal computer.

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Abstract

Provided is a light-emitting device capable of easily and accurately adjusting a position between a laser source and a collimator lens; also provided are an information acquisition device and an object detection device mounted therewith. A light-emitting device (10) is provided with a laser source (110), a collimator lens (120), a DOE (140), and a housing (150). A prescribed gap is provided in the XY axis direction between a CAN (110b) and the aperture (150b) of the housing. A prescribed gap is provided in the Z axis direction between a lens holder (121) and the housing. The position of the laser source is adjusted in the XY axis direction by means of moving said laser source while a step part (111b) of the laser holder (111) is in contact with the outside surface of the housing. The position of the collimator lens is adjusted in the Z axis direction by means of a groove (121e) of the lens holder and a pressing spring (160) while said collimator lens is pressed against an inclined surface (150d) of the housing.

Description

[規則37.2に基づきISAが決定した発明の名称]　発光装置、情報取得装置およびこれを搭載する物体検出装置[Name of invention determined by ISA based on Rule 37.2] Light-emitting device, information acquisition device, and object detection device equipped with the same
　本発明は、目標領域に光を投射したときの反射光の状態に基づいて目標領域内の物体を検出する物体検出装置、当該物体検出装置に用いて好適な情報取得装置、および当該物体検出装置に搭載される発光装置に関する。 The present invention relates to an object detection device that detects an object in a target region based on a state of reflected light when light is projected onto the target region, an information acquisition device suitable for use in the object detection device, and the object detection device. The present invention relates to a light emitting device to be mounted on.
　従来、光を用いた物体検出装置が種々の分野で開発されている。いわゆる距離画像センサを用いた物体検出装置では、２次元平面上の平面的な画像のみならず、検出対象物体の奥行き方向の形状や動きを検出することができる。かかる物体検出装置では、レーザ光源やＬＥＤ（Light Emitting Diode）から、予め決められた波長帯域の光が目標領域に投射され、その反射光がＣＭＯＳイメージセンサ等の受光素子により受光される。距離画像センサとして、種々のタイプのものが知られている。 Conventionally, an object detection device using light has been developed in various fields. An object detection apparatus using a so-called distance image sensor can detect not only a planar image on a two-dimensional plane but also the shape and movement of the detection target object in the depth direction. In such an object detection device, light in a predetermined wavelength band is projected from a laser light source or LED (Light-Emitting-Diode) onto a target area, and the reflected light is received by a light-receiving element such as a CMOS image sensor. Various types of distance image sensors are known.
　所定のドットパターンを持つレーザ光を目標領域に照射するタイプの距離画像センサでは、ドットパターンを持つレーザ光の目標領域からの反射光が受光素子によって受光される。そして、ドットの受光素子上の受光位置に基づいて、三角測量法を用いて、検出対象物体の各部（検出対象物体上の各ドットの照射位置）までの距離が検出される（たとえば、非特許文献１）。 In a distance image sensor of a type that irradiates a target region with laser light having a predetermined dot pattern, reflected light from the target region of laser light having a dot pattern is received by a light receiving element. Based on the light receiving position of the dot on the light receiving element, the distance to each part of the detection target object (irradiation position of each dot on the detection target object) is detected using triangulation (for example, non-patent) Reference 1).
　上記物体検出装置では、ドットパターンを持つレーザ光を生成するために、コリメータレンズと回折光学素子が用いられ得る。 In the object detection apparatus, a collimator lens and a diffractive optical element can be used to generate laser light having a dot pattern.
　この場合、コリメータレンズがレーザ光源の光軸上において所期の位置から前後にずれると、コリメータレンズを透過した後のレーザ光の広がり角が変化する。このため、レーザ光が所望の広がり角で回折光学素子に入射しなくなり、ドットパターンのドットの大きさが所期の大きさにならなくなる。また、コリメータレンズの光軸がレーザ光源の光軸からずれると、コリメータレンズを透過した後のレーザ光の進行方向が変化する。このため、レーザ光が、斜め方向から回折光学素子に入射するようになり、ドットパターンのレーザ光の照射領域が適正位置からずれてしまう。 In this case, when the collimator lens is shifted back and forth from the expected position on the optical axis of the laser light source, the spread angle of the laser light after passing through the collimator lens changes. For this reason, the laser beam does not enter the diffractive optical element at a desired spread angle, and the dot size of the dot pattern does not become the expected size. Further, when the optical axis of the collimator lens is shifted from the optical axis of the laser light source, the traveling direction of the laser light after passing through the collimator lens changes. For this reason, the laser light enters the diffractive optical element from an oblique direction, and the irradiation area of the laser light of the dot pattern is shifted from the appropriate position.
　このように、コリメータレンズとレーザ光源の相対位置が適正位置からずれると、所望の照射状態でドットパターンが照射されなくなり、測定精度に悪影響を及ぼす可能性がある。 As described above, if the relative position of the collimator lens and the laser light source deviates from an appropriate position, the dot pattern is not irradiated in a desired irradiation state, which may adversely affect the measurement accuracy.
　本発明は、このような問題を解消するためになされたものであり、レーザ光源とコリメータレンズとの間の位置調整を精度よく、且つ、容易に行える発光装置、情報取得装置およびこれを搭載する物体検出装置を提供することを目的とする。 The present invention has been made to solve such a problem, and includes a light emitting device, an information acquisition device, and a device capable of easily and accurately adjusting the position between a laser light source and a collimator lens. An object of the present invention is to provide an object detection device.
　本発明の第１の態様は、発光装置に関する。本態様に係る発光装置は、レーザ光源と、前記レーザ光源から出射されたレーザ光を平行光に変換するコリメータレンズと、前記平行光に変換されたレーザ光が入射する回折光学素子と、前記レーザ光源、前記コリメータレンズおよび前記回折光学素子を収容するハウジングと、前記レーザ光源の出射光軸に垂直な面内方向において前記レーザ光源の位置を調整するための第１の位置調整部と、前記コリメータレンズの光軸に平行な方向において前記コリメータレンズの位置を調整するための第２の位置調整部と、を有する。 The first aspect of the present invention relates to a light emitting device. The light-emitting device according to this aspect includes a laser light source, a collimator lens that converts laser light emitted from the laser light source into parallel light, a diffractive optical element on which the laser light converted into parallel light is incident, and the laser A housing for housing the light source, the collimator lens and the diffractive optical element; a first position adjusting unit for adjusting the position of the laser light source in an in-plane direction perpendicular to the emission optical axis of the laser light source; and the collimator A second position adjusting unit for adjusting the position of the collimator lens in a direction parallel to the optical axis of the lens.
　本発明の第２の態様は、光を用いて目標領域の情報取得する情報取得装置に関する。本態様にかかる情報取得装置は、上記第１の態様に係る発光装置と、前記目標領域から反射された反射光を受光する受光装置と、を備える。 A second aspect of the present invention relates to an information acquisition apparatus that acquires information on a target area using light. An information acquisition device according to this aspect includes the light-emitting device according to the first aspect and a light-receiving device that receives reflected light reflected from the target region.
　本発明の第３の態様は、物体検出装置に関する。本態様に係る物体検出装置は、上記第２の態様に係る情報取得装置を備える。 The third aspect of the present invention relates to an object detection apparatus. The object detection apparatus according to this aspect includes the information acquisition apparatus according to the second aspect.
　以上のとおり、本発明によれば、レーザ光源とコリメータレンズとの間の位置調整を精度よく、且つ、容易に行える発光装置、情報取得装置およびこれを搭載する物体検出装置を提供することができる。 As described above, according to the present invention, it is possible to provide a light-emitting device, an information acquisition device, and an object detection device equipped with the light-emitting device that can easily and accurately adjust the position between the laser light source and the collimator lens. .
　本発明の効果ないし意義は、以下に示す実施の形態の説明により更に明らかとなろう。ただし、以下に示す実施の形態は、あくまでも、本発明を実施化する際の一つの例示であって、本発明は、以下の実施の形態により何ら制限されるものではない。 The effect or significance of the present invention will become more apparent from the following description of embodiments. However, the embodiment described below is merely an example when the present invention is implemented, and the present invention is not limited to the following embodiment.
実施の形態に係る物体検出装置の構成を示す図である。It is a figure which shows the structure of the object detection apparatus which concerns on embodiment. 実施の形態に係る情報取得装置と情報処理装置の構成を示す図である。It is a figure which shows the structure of the information acquisition apparatus and information processing apparatus which concern on embodiment. 実施の形態に係る目標領域に対するレーザ光の照射状態とイメージセンサ上のレーザ光の受光状態を示す図である。It is a figure which shows the irradiation state of the laser beam with respect to the target area | region which concerns on embodiment, and the light reception state of the laser beam on an image sensor. 実施の形態に係る発光装置の分解斜視図を示す図である。It is a figure which shows the disassembled perspective view of the light-emitting device which concerns on embodiment. 実施の形態に係る発光装置の構成を示す図である。It is a figure which shows the structure of the light-emitting device which concerns on embodiment. 実施の形態に係る情報取得装置の組立過程を示す図である。It is a figure which shows the assembly process of the information acquisition apparatus which concerns on embodiment. 実施の形態に係る情報取得装置の組立過程を示す図である。It is a figure which shows the assembly process of the information acquisition apparatus which concerns on embodiment. 実施の形態に係る情報取得装置の組立過程を示す図である。It is a figure which shows the assembly process of the information acquisition apparatus which concerns on embodiment. 実施の形態に係る発光装置の断面を示す図である。It is a figure which shows the cross section of the light-emitting device which concerns on embodiment. 実施の形態に係る発光装置の断面を示す図である。It is a figure which shows the cross section of the light-emitting device which concerns on embodiment. 実施の形態に係る発光装置のレンズの位置調整を示す図である。It is a figure which shows the position adjustment of the lens of the light-emitting device which concerns on embodiment. 実施の形態に係る発光装置のレーザ光源の位置調整を示す図である。It is a figure which shows position adjustment of the laser light source of the light-emitting device which concerns on embodiment.
　以下、本発明の実施の形態につき図面を参照して説明する。本実施の形態には、所定のドットパターンを持つレーザ光を目標領域に照射するタイプの情報取得装置が例示されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, an information acquisition device of a type that irradiates a target area with laser light having a predetermined dot pattern is exemplified.
　まず、図１に本実施の形態に係る物体検出装置の概略構成を示す。図示の如く、物体検出装置は、情報取得装置１と、情報処理装置２とを備えている。テレビ３は、情報処理装置２からの信号によって制御される。 First, FIG. 1 shows a schematic configuration of the object detection apparatus according to the present embodiment. As illustrated, the object detection device includes an information acquisition device 1 and an information processing device 2. The television 3 is controlled by a signal from the information processing device 2.
　情報取得装置１は、目標領域全体に赤外光を投射し、その反射光をＣＭＯＳイメージセンサにて受光することにより、目標領域にある物体各部の距離（以下、「３次元距離情報」という）を取得する。取得された３次元距離情報は、ケーブル４を介して情報処理装置２に送られる。 The information acquisition device 1 projects infrared light over the entire target area and receives the reflected light with a CMOS image sensor, whereby the distance between each part of the object in the target area (hereinafter referred to as “three-dimensional distance information”). To get. The acquired three-dimensional distance information is sent to the information processing apparatus 2 via the cable 4.
　情報処理装置２は、たとえば、テレビ制御用のコントローラやゲーム機、パーソナルコンピュータ等である。情報処理装置２は、情報取得装置１から受信した３次元距離情報に基づき、目標領域における物体を検出し、検出結果に基づきテレビ３を制御する。 The information processing apparatus 2 is, for example, a controller for TV control, a game machine, a personal computer, or the like. The information processing device 2 detects an object in the target area based on the three-dimensional distance information received from the information acquisition device 1, and controls the television 3 based on the detection result.
　たとえば、情報処理装置２は、受信した３次元距離情報に基づき人を検出するとともに、３次元距離情報の変化から、その人の動きを検出する。たとえば、情報処理装置２がテレビ制御用のコントローラである場合、情報処理装置２には、受信した３次元距離情報からその人のジャスチャを検出するとともに、ジェスチャに応じてテレビ３に制御信号を出力するアプリケーションプログラムがインストールされている。この場合、ユーザは、テレビ３を見ながら所定のジェスチャをすることにより、チャンネル切り替えやボリュームのＵｐ／Ｄｏｗｎ等、所定の機能をテレビ３に実行させることができる。 For example, the information processing apparatus 2 detects a person based on the received three-dimensional distance information and detects the movement of the person from the change in the three-dimensional distance information. For example, when the information processing device 2 is a television control controller, the information processing device 2 detects the person's gesture from the received three-dimensional distance information and outputs a control signal to the television 3 in accordance with the gesture. The application program to be installed is installed. In this case, the user can cause the television 3 to execute a predetermined function such as channel switching or volume up / down by making a predetermined gesture while watching the television 3.
　また、たとえば、情報処理装置２がゲーム機である場合、情報処理装置２には、受信した３次元距離情報からその人の動きを検出するとともに、検出した動きに応じてテレビ画面上のキャラクタを動作させ、ゲームの対戦状況を変化させるアプリケーションプログラムがインストールされている。この場合、ユーザは、テレビ３を見ながら所定の動きをすることにより、自身がテレビ画面上のキャラクタとしてゲームの対戦を行う臨場感を味わうことができる。 Further, for example, when the information processing device 2 is a game machine, the information processing device 2 detects the person's movement from the received three-dimensional distance information, and displays a character on the television screen according to the detected movement. An application program that operates and changes the game battle situation is installed. In this case, the user can experience a sense of realism in which he / she plays a game as a character on the television screen by making a predetermined movement while watching the television 3.
　図２は、情報取得装置１と情報処理装置２の構成を示す図である。図２には、便宜上、投射光学系１００と受光光学系２００に関する方向を示すために、互いに直交するＸ－Ｙ－Ｚ軸が付されている。 FIG. 2 is a diagram showing the configuration of the information acquisition device 1 and the information processing device 2. In FIG. 2, for convenience, XYZ axes orthogonal to each other are attached to indicate directions related to the projection optical system 100 and the light receiving optical system 200.
　情報取得装置１は、光学部の構成として、投射光学系１００と受光光学系２００とを備えている。投射光学系１００と受光光学系２００は、Ｚ軸方向に並ぶように、情報取得装置１に配置される。 The information acquisition apparatus 1 includes a projection optical system 100 and a light receiving optical system 200 as a configuration of an optical unit. The projection optical system 100 and the light receiving optical system 200 are arranged in the information acquisition apparatus 1 so as to be aligned in the Z-axis direction.
　投射光学系１００は、レーザ光源１１０と、コリメータレンズ１２０と、立ち上げミラー１３０と、回折光学素子（ＤＯＥ：Diffractive Optical Element）１４０とを備えている。また、受光光学系２００は、フィルタ２１０と、アパーチャ２２０と、撮像レンズ２３０と、ＣＭＯＳイメージセンサ２４０とを備えている。この他、情報取得装置１は、回路部の構成として、ＣＰＵ（Central Processing Unit）２１と、レーザ駆動回路２２と、撮像信号処理回路２３と、入出力回路２４と、メモリ２５を備えている。 The projection optical system 100 includes a laser light source 110, a collimator lens 120, a rising mirror 130, and a diffractive optical element (DOE: Diffractive Optical Element) 140. The light receiving optical system 200 includes a filter 210, an aperture 220, an imaging lens 230, and a CMOS image sensor 240. In addition, the information acquisition device 1 includes a CPU (Central Processing Unit) 21, a laser driving circuit 22, an imaging signal processing circuit 23, an input / output circuit 24, and a memory 25 as a circuit unit.
　レーザ光源１１０は、受光光学系２００から離れる方向（Ｚ軸正方向）に波長８３０ｎｍ程度の狭波長帯域のレーザ光を出力する。コリメータレンズ１２０は、レーザ光源１１０から出射されたレーザ光を平行光から僅かに広がった光（以下、単に「平行光」という）に変換する。立ち上げミラー１３０は、コリメータレンズ１２０側から入射されたレーザ光をＤＯＥ１４０に向かう方向（Ｙ軸正方向）に反射する。 The laser light source 110 outputs laser light in a narrow wavelength band with a wavelength of about 830 nm in a direction away from the light receiving optical system 200 (Z-axis positive direction). The collimator lens 120 converts the laser light emitted from the laser light source 110 into light slightly spread from parallel light (hereinafter simply referred to as “parallel light”). The raising mirror 130 reflects the laser beam incident from the collimator lens 120 side in the direction toward the DOE 140 (Y-axis positive direction).
　ＤＯＥ１４０は、入射面に回折パターンを有する。この回折パターンによる回折作用により、ＤＯＥ１４０に入射したレーザ光は、ドットパターンのレーザ光に変換されて、目標領域に照射される。回折パターンは、たとえば、ステップ型の回折ホログラムが所定のパターンで形成された構造とされる。回折ホログラムは、コリメータレンズ１２０により平行光とされたレーザ光をドットパターンのレーザ光に変換するよう、パターンとピッチが調整されている。 The DOE 140 has a diffraction pattern on the incident surface. Due to the diffraction effect of the diffraction pattern, the laser light incident on the DOE 140 is converted into a dot pattern laser light and irradiated onto the target region. The diffraction pattern has, for example, a structure in which a step type diffraction hologram is formed in a predetermined pattern. The diffraction hologram is adjusted in pattern and pitch so as to convert the laser light converted into parallel light by the collimator lens 120 into laser light of a dot pattern.
　ＤＯＥ１４０は、立ち上げミラー１３０から入射されたレーザ光を、放射状に広がるドットパターンのレーザ光として、目標領域に照射する。ドットパターンの各ドットの大きさは、ＤＯＥ１４０に入射する際のレーザ光のビームサイズに応じたものとなる。ＤＯＥ１４０にて回折されないレーザ光（０次光）は、ＤＯＥ１４０を透過してそのまま直進する。 The DOE 140 irradiates the target region with the laser beam incident from the rising mirror 130 as a laser beam having a dot pattern that spreads radially. The size of each dot in the dot pattern depends on the beam size of the laser light when entering the DOE 140. Laser light (0th order light) that is not diffracted by the DOE 140 passes through the DOE 140 and travels straight.
　なお、投射光学系１００の詳細な構成は、追って図４ないし図１２を参照して、説明する。 The detailed configuration of the projection optical system 100 will be described later with reference to FIGS.
　目標領域から反射されたレーザ光は、フィルタ２１０とアパーチャ２２０を介して撮像レンズ２３０に入射する。 The laser light reflected from the target area enters the imaging lens 230 via the filter 210 and the aperture 220.
　フィルタ２１０は、レーザ光源１１０の出射波長（８３０ｎｍ程度）を含む波長帯域の光を透過し、可視光の波長帯域をカットするバンドパスフィルタである。アパーチャ２２０は、撮像レンズ２３０のＦナンバーに合うように、外部からの光に絞りを掛ける。撮像レンズ２３０は、アパーチャ２２０を介して入射された光をＣＭＯＳイメージセンサ２４０上に集光する。 The filter 210 is a band-pass filter that transmits light in a wavelength band including the emission wavelength (about 830 nm) of the laser light source 110 and cuts the wavelength band of visible light. The aperture 220 stops the light from the outside so as to match the F number of the imaging lens 230. The imaging lens 230 condenses the light incident through the aperture 220 on the CMOS image sensor 240.
　ＣＭＯＳイメージセンサ２４０は、撮像レンズ２３０にて集光された光を受光して、画素毎に、受光光量に応じた信号（電荷）を撮像信号処理回路２３に出力する。ここで、ＣＭＯＳイメージセンサ２４０は、各画素における受光から高レスポンスでその画素の信号（電荷）を撮像信号処理回路２３に出力できるよう、信号の出力速度が高速化されている。 The CMOS image sensor 240 receives the light collected by the imaging lens 230 and outputs a signal (charge) corresponding to the amount of received light to the imaging signal processing circuit 23 for each pixel. Here, in the CMOS image sensor 240, the output speed of the signal is increased so that the signal (charge) of the pixel can be output to the imaging signal processing circuit 23 with high response from the light reception in each pixel.
　ＣＰＵ２１は、メモリ２５に格納された制御プログラムに従って各部を制御する。かかる制御プログラムによって、ＣＰＵ２１には、レーザ光源１１０を制御するためのレーザ制御部２１ａと、３次元距離情報を生成するための距離演算部２１ｂの機能が付与される。 The CPU 21 controls each unit according to a control program stored in the memory 25. With this control program, the CPU 21 is provided with the functions of a laser control unit 21a for controlling the laser light source 110 and a distance calculation unit 21b for generating three-dimensional distance information.
　レーザ駆動回路２２は、ＣＰＵ２１からの制御信号に応じてレーザ光源１１０を駆動する。撮像信号処理回路２３は、ＣＭＯＳイメージセンサ２４０を制御して、ＣＭＯＳイメージセンサ２４０で生成された各画素の信号（電荷）をライン毎に順次取り込む。そして、取り込んだ信号を順次ＣＰＵ２１に出力する。ＣＰＵ２１は、撮像信号処理回路２３から供給される信号（撮像信号）をもとに、情報取得装置１から検出対象物の各部までの距離を、距離演算部２１ｂによる処理によって算出する。入出力回路２４は、情報処理装置２とのデータ通信を制御する。 The laser drive circuit 22 drives the laser light source 110 according to a control signal from the CPU 21. The imaging signal processing circuit 23 controls the CMOS image sensor 240 and sequentially takes in the signal (charge) of each pixel generated by the CMOS image sensor 240 for each line. Then, the captured signals are sequentially output to the CPU 21. Based on the signal (imaging signal) supplied from the imaging signal processing circuit 23, the CPU 21 calculates the distance from the information acquisition device 1 to each part of the detection target by processing by the distance calculation unit 21b. The input / output circuit 24 controls data communication with the information processing apparatus 2.
　情報処理装置２は、ＣＰＵ３１と、入出力回路３２と、メモリ３３を備えている。なお、情報処理装置２には、同図に示す構成の他、テレビ３との通信を行うための構成や、ＣＤ－ＲＯＭ等の外部メモリに格納された情報を読み取ってメモリ３３にインストールするためのドライブ装置等が配されるが、便宜上、これら周辺回路の構成は図示省略されている。 The information processing apparatus 2 includes a CPU 31, an input / output circuit 32, and a memory 33. In addition to the configuration shown in the figure, the information processing apparatus 2 has a configuration for performing communication with the television 3 and for reading information stored in an external memory such as a CD-ROM and installing it in the memory 33. However, the configuration of these peripheral circuits is not shown for the sake of convenience.
　ＣＰＵ３１は、メモリ３３に格納された制御プログラム（アプリケーションプログラム）に従って各部を制御する。かかる制御プログラムによって、ＣＰＵ３１には、画像中の物体を検出するための物体検出部３１ａの機能が付与される。かかる制御プログラムは、たとえば、図示しないドライブ装置によってＣＤ－ＲＯＭから読み取られ、メモリ３３にインストールされる。 The CPU 31 controls each unit according to a control program (application program) stored in the memory 33. With such a control program, the CPU 31 is provided with the function of the object detection unit 31a for detecting an object in the image. Such a control program is read from a CD-ROM by a drive device (not shown) and installed in the memory 33, for example.
　たとえば、制御プログラムがゲームプログラムである場合、物体検出部３１ａは、情報取得装置１から供給される３次元距離情報から画像中の人およびその動きを検出する。そして、検出された動きに応じてテレビ画面上のキャラクタを動作させるための処理が制御プログラムにより実行される。 For example, when the control program is a game program, the object detection unit 31a detects a person in the image and its movement from the three-dimensional distance information supplied from the information acquisition device 1. Then, a process for operating the character on the television screen according to the detected movement is executed by the control program.
　また、制御プログラムがテレビ３の機能を制御するためのプログラムである場合、物体検出部３１ａは、情報取得装置１から供給される３次元距離情報から画像中の人およびその動き（ジェスチャ）を検出する。そして、検出された動き（ジェスチャ）に応じて、テレビ３の機能（チャンネル切り替えやボリューム調整、等）を制御するための処理が制御プログラムにより実行される。 When the control program is a program for controlling the function of the television 3, the object detection unit 31 a detects a person in the image and its movement (gesture) from the three-dimensional distance information supplied from the information acquisition device 1. To do. Then, processing for controlling functions (channel switching, volume adjustment, etc.) of the television 3 is executed by the control program in accordance with the detected movement (gesture).
　入出力回路３２は、情報取得装置１とのデータ通信を制御する。 The input / output circuit 32 controls data communication with the information acquisition device 1.
　図３（ａ）は、目標領域に対するレーザ光の照射状態を模式的に示す図、図３（ｂ）は、ＣＭＯＳイメージセンサ２４０におけるレーザ光の受光状態を模式的に示す図である。なお、同図（ｂ）には、便宜上、目標領域に平坦な面（スクリーン）が存在するときの受光状態が示されている。 FIG. 3A is a diagram schematically showing the irradiation state of the laser light on the target region, and FIG. 3B is a diagram schematically showing the light receiving state of the laser light in the CMOS image sensor 240. FIG. For the sake of convenience, FIG. 6B shows a light receiving state when a flat surface (screen) exists in the target area.
　投射光学系１００からは、ドットパターンを持ったレーザ光（以下、このパターンを持つレーザ光の全体を「ＤＰ光」という）が、目標領域に照射される。同図（ａ）には、ＤＰ光の光束領域が実線の枠によって示されている。ＤＰ光の光束中には、ＤＯＥ１４０による回折作用によってレーザ光の強度が高められたドット領域（以下、単に「ドット」という）が、ＤＯＥ１４０による回折作用によるドットパターンに従って点在している。 From the projection optical system 100, laser light having a dot pattern (hereinafter, the entire laser light having this pattern is referred to as “DP light”) is irradiated onto the target area. In FIG. 5A, the light flux region of DP light is indicated by a solid line frame. In the light flux of DP light, dot regions (hereinafter simply referred to as “dots”) in which the intensity of the laser light is increased by the diffraction action by the DOE 140 are scattered according to the dot pattern by the diffraction action by the DOE 140.
　なお、図３（ａ）では、便宜上、ＤＰ光の光束が、マトリックス状に並ぶ複数のセグメント領域に区分されている。各セグメント領域には、ドットが固有のパターンで点在している。一つのセグメント領域におけるドットの点在パターンは、他の全てのセグメント領域におけるドットの点在パターンと相違する。これにより、各セグメント領域は、ドットの点在パターンをもって、他の全てのセグメント領域から区別可能となっている。 In FIG. 3A, for convenience, the light beam of DP light is divided into a plurality of segment regions arranged in a matrix. In each segment area, dots are scattered in a unique pattern. The dot dot pattern in one segment area is different from the dot dot pattern in all other segment areas. As a result, each segment area can be distinguished from all other segment areas with a dot dot pattern.
　目標領域に平坦な面（スクリーン）が存在すると、これにより反射されたＤＰ光の各セグメント領域は、同図（ｂ）のように、ＣＭＯＳイメージセンサ２４０上においてマトリックス状に分布する。たとえば、同図（ａ）に示す目標領域上におけるセグメント領域Ｓ０の光は、ＣＭＯＳイメージセンサ２４０上では、同図（ｂ）に示すセグメント領域Ｓｐに入射する。なお、図３（ｂ）においても、ＤＰ光の光束領域が実線の枠によって示され、便宜上、ＤＰ光の光束が、マトリックス状に並ぶ複数のセグメント領域に区分されている。 When there is a flat surface (screen) in the target area, the segment areas of DP light reflected thereby are distributed in a matrix on the CMOS image sensor 240 as shown in FIG. For example, the light in the segment area S0 on the target area shown in FIG. 11A is incident on the segment area Sp shown in FIG. In FIG. 3B as well, the light flux region of DP light is indicated by a solid frame, and for convenience, the light beam of DP light is divided into a plurality of segment regions arranged in a matrix.
　上記距離演算部２１ｂでは、ＣＭＯＳイメージセンサ２４０上における各セグメント領域の位置が検出され、検出された各セグメント領域の位置から、三角測量法に基づいて、検出対象物体の各セグメント領域に対応する位置までの距離が検出される。かかる検出手法の詳細は、たとえば、上記非特許文献１（第１９回日本ロボット学会学術講演会（２００１年９月１８－２０日）予稿集、Ｐ１２７９－１２８０）に示されている。 In the distance calculation unit 21b, the position of each segment area on the CMOS image sensor 240 is detected, and the position corresponding to each segment area of the detection target object is determined based on the triangulation method from the detected position of each segment area. The distance to is detected. Details of such a detection technique are described in, for example, Non-Patent Document 1 (The 19th Annual Conference of the Robotics Society of Japan (September 18-20, 2001), Proceedings, P1279-1280).
　ところで、本実施の形態において、レーザ光源１１０とコリメータレンズ１２０は、両者の光軸が一致するように配置される。また、光軸方向におけるレーザ光源１１０とコリメータレンズ１２０の配置は、レーザ光源１１０の発光点がコリメータレンズ１２０の焦点位置から僅かにコリメータレンズ１２０側に変位するように調整される。さらに、ＤＯＥ１４０は、入射面（回折パターンが形成された面）が、図２のＹ軸に垂直となるように配置される。これにより、レーザ光は、平行光から僅かに広がり、且つ、光軸がＤＯＥ１４０の入射面に垂直となるように、ＤＯＥ１４０に入射する。こうして、所望のドットパターンのＤＰ光が、目標領域の所望の範囲に照射される。 Incidentally, in the present embodiment, the laser light source 110 and the collimator lens 120 are arranged so that the optical axes of both coincide. The arrangement of the laser light source 110 and the collimator lens 120 in the optical axis direction is adjusted so that the light emission point of the laser light source 110 is slightly displaced from the focal position of the collimator lens 120 to the collimator lens 120 side. Further, the DOE 140 is arranged such that the incident surface (the surface on which the diffraction pattern is formed) is perpendicular to the Y axis in FIG. As a result, the laser light is incident on the DOE 140 such that the light beam slightly spreads from the parallel light and the optical axis is perpendicular to the incident surface of the DOE 140. In this way, DP light having a desired dot pattern is irradiated onto a desired range of the target area.
　しかしながら、レーザ光源１１０とコリメータレンズ１２０の設置位置にずれが生じると、レーザ光源１１０とコリメータレンズ１２０の光軸にずれが生じ、または、レーザ光源１１０の発光点が所期の位置からずれてしまい、これに応じて、目標領域におけるＤＰ光の照射状態が変化する。 However, if the installation positions of the laser light source 110 and the collimator lens 120 are shifted, the optical axes of the laser light source 110 and the collimator lens 120 are shifted, or the light emission point of the laser light source 110 is shifted from the intended position. Accordingly, the irradiation state of the DP light in the target region changes.
　たとえば、コリメータレンズ１２０の位置が、レーザ光源１１０の光軸上において所期の位置からずれると、コリメータレンズ１２０を透過した後のレーザ光の広がり角が変化する。このため、レーザ光が所望の広がり角でＤＯＥ１４０に入射しなくなり、目標領域におけるＤＰ光のドットの大きさが所期の大きさにならなくなる。このようにドットが変化すると、セグメント領域の位置検出のためのドットパターンの照合が適正に行われなくなる。 For example, when the position of the collimator lens 120 deviates from an expected position on the optical axis of the laser light source 110, the spread angle of the laser light after passing through the collimator lens 120 changes. For this reason, the laser beam does not enter the DOE 140 at a desired spread angle, and the size of the DP light dot in the target region does not become the expected size. When the dot changes in this way, the dot pattern for the position detection of the segment area is not properly verified.
　また、コリメータレンズ１２０の光軸がレーザ光源１１０の光軸からずれると、コリメータレンズ１２０を透過した後のレーザ光の進行方向が、コリメータレンズ１２０の光軸に対して傾く。このため、レーザ光が、斜め方向からＤＯＥ１４０に入射するようになり、目標領域におけるＤＰ光の照射範囲が受光光学系２００の撮像範囲からずれてしまう。
これにより、物体検出を適正に行えなくなる惧れがある。 Further, when the optical axis of the collimator lens 120 is deviated from the optical axis of the laser light source 110, the traveling direction of the laser light after passing through the collimator lens 120 is inclined with respect to the optical axis of the collimator lens 120. For this reason, the laser light enters the DOE 140 from an oblique direction, and the irradiation range of the DP light in the target area is shifted from the imaging range of the light receiving optical system 200.
As a result, object detection may not be performed properly.
　このような問題を解消するために、本実施の形態では、製造時において、レーザ光源１１０とコリメータレンズ１２０の相対位置をＸ軸、Ｙ軸、Ｚ軸方向に沿って容易に調整するための構成が、以下に示す発光装置１０に配備されている。 In order to solve such a problem, in the present embodiment, a configuration for easily adjusting the relative positions of the laser light source 110 and the collimator lens 120 along the X-axis, Y-axis, and Z-axis directions during manufacturing. Is provided in the light emitting device 10 shown below.
　図４は、本実施の形態に係る発光装置１０の構成例を示す分解斜視図である。発光装置１０は、図２中の投射光学系１００が他の部品とともにユニット化された装置である。なお、図４（ａ）には、図２で示したＸ－Ｙ－Ｚ軸とともに、前後左右上下の方向が示されている。上下方向はＹ軸方向に平行、左右方向はＸ軸方向に平行、前後方向はＺ軸方向に平行である。 FIG. 4 is an exploded perspective view showing a configuration example of the light emitting device 10 according to the present embodiment. The light emitting device 10 is a device in which the projection optical system 100 in FIG. 2 is unitized together with other components. FIG. 4A shows the front, rear, left, right, and up and down directions along with the XYZ axes shown in FIG. The vertical direction is parallel to the Y-axis direction, the horizontal direction is parallel to the X-axis direction, and the front-back direction is parallel to the Z-axis direction.
　図４（ａ）を参照して、発光装置１０は、上述のレーザ光源１１０と、コリメータレンズ１２０と、立ち上げミラー１３０と、ＤＯＥ１４０の他に、レーザホルダ１１１と、レンズホルダ１２１と、ＤＯＥホルダ１４１と、ハウジング１５０と、押さえバネ１６０を備えている。 Referring to FIG. 4A, the light emitting device 10 includes a laser holder 111, a lens holder 121, and a DOE holder in addition to the laser light source 110, the collimator lens 120, the rising mirror 130, and the DOE 140 described above. 141, a housing 150, and a pressing spring 160 are provided.
　図示の如く、レーザ光源１１０は、ベース１１０ａとＣＡＮ１１０ｂとを有する。ベース１１０ａは、正面視において、外周が一部切り欠かれた円形の輪郭を有する。また、コリメータレンズ１２０は、円柱状の外周面を有する大径部１２０ａと、大径部よりも径が小さい小径部１２０ｂを有する。 As shown, the laser light source 110 has a base 110a and a CAN 110b. The base 110a has a circular outline with a part of the outer periphery cut out when viewed from the front. The collimator lens 120 has a large diameter portion 120a having a cylindrical outer peripheral surface and a small diameter portion 120b having a diameter smaller than that of the large diameter portion.
　レーザホルダ１１１は、正面視において正方形の輪郭を有し、中央に円形の開口１１１ａが形成された枠部材からなっている。開口１１１ａは、レーザホルダ１１１を前後方向に貫通しており、径が異なる円柱状の２つの穴が同軸上に並んだ構成となっている。開口１１１ａの前方の穴の径は後方の穴の径よりも大きくなっており、径が変化する境界には、リング状の段差が形成されている。開口１１１ａの前方の穴の径は、レーザ光源１１０のベース１１０ａの径よりも僅かに大きい。レーザ光源１１０のベース１１０ａの後面が開口１１１ａ内の段差に当接するまで、前側からベース１１０ａを開口１１１ａに嵌め込むことにより、レーザ光源１１０がレーザホルダ１１１に対して位置決めされる。この状態で、ベース１１０ａ外周の切り欠きに接着材が注入され、レーザ光源１１０がレーザホルダ１１１に接着固定される。レーザホルダ１１１は、亜鉛等の熱伝導性の高い物質からなり、一般的なダイカスト鋳造によって製造される。 The laser holder 111 is a frame member having a square outline in a front view and having a circular opening 111a formed at the center. The opening 111a penetrates the laser holder 111 in the front-rear direction, and has a configuration in which two cylindrical holes having different diameters are arranged on the same axis. The diameter of the hole in front of the opening 111a is larger than the diameter of the hole in the rear, and a ring-shaped step is formed at the boundary where the diameter changes. The diameter of the hole in front of the opening 111a is slightly larger than the diameter of the base 110a of the laser light source 110. The laser light source 110 is positioned with respect to the laser holder 111 by fitting the base 110a into the opening 111a from the front side until the rear surface of the base 110a of the laser light source 110 contacts the step in the opening 111a. In this state, an adhesive is injected into the cutout on the outer periphery of the base 110 a, and the laser light source 110 is bonded and fixed to the laser holder 111. The laser holder 111 is made of a material having high thermal conductivity such as zinc, and is manufactured by general die casting.
　図４（ｂ）に示すように、レーザホルダ１１１の背面の外周部には、他の部分より１段高くなっている４つの段部１１１ｂが形成されている。４つの段部１１１ｂは、同じ高さ、同じ形状である。４つの段部１１１ｂの高さ方向の端面は、何れも、Ｘ－Ｙ平面に平行である。後述するように、段部１１１ｂをハウジング１５０の外側面に当接させた状態で、レーザホルダ１１１をＸ－Ｙ平面の面内方向に変位させることにより、レーザ光源１１０の位置が調整される。このとき、段部１１１ｂとハウジング１５０の外側面との間の接触面積が小さいため、レーザホルダ１１１の変位がスムーズに行われ得る。 As shown in FIG. 4B, four step portions 111 b that are one step higher than the other portions are formed on the outer peripheral portion of the back surface of the laser holder 111. The four step portions 111b have the same height and the same shape. The end faces in the height direction of the four step portions 111b are all parallel to the XY plane. As will be described later, the position of the laser light source 110 is adjusted by displacing the laser holder 111 in the in-plane direction of the XY plane while the stepped portion 111b is in contact with the outer surface of the housing 150. At this time, since the contact area between the step portion 111b and the outer surface of the housing 150 is small, the laser holder 111 can be displaced smoothly.
　なお、このように４つの段部１１１ｂを設けることにより、レーザホルダ１１１用の金型を容易に調整できるとの効果も奏され得る。すなわち、金型調整時には、Ｚ軸に垂直な基準面に対して４つの段部１１１ｂの位置ずれを計測し、修正対象の段部１１１ｂに対応する金型部分を調整すればよい。 In addition, the effect that the metal mold | die for laser holder 111 can be adjusted easily by providing the four step parts 111b in this way can also be show | played. That is, at the time of mold adjustment, the positional deviation of the four step portions 111b with respect to the reference plane perpendicular to the Z axis may be measured to adjust the mold portion corresponding to the step portion 111b to be corrected.
　図４（ａ）に戻り、レンズホルダ１２１は、正面視において略円形の輪郭を有し、中央に開口１２１ａが形成された枠部材からなっている。開口１２１ａは、レンズホルダ１２１を前後方向に貫通しており、径が異なる円柱状の２つの穴が同軸上に並んだ構成となっている。開口１２１ａの前方の穴の径は後方の穴の径よりも大きくなっており、径が変化する境界には、リング状の段差が形成されている。開口１２１ａの前方の穴の径は、コリメータレンズ１２０の大径部１２０ａの径よりも僅かに大きい。コリメータレンズ１２０の大径部１２０ａの後面が開口１２１ａ内の段差に当接するまで、前側から大径部１２０ａを開口１２１ａに嵌め込むことにより、コリメータレンズ１２０がレンズホルダ１２１に対して位置決めされる。この状態で、コリメータレンズ１２０がレンズホルダ１２１に接着固定される。 Returning to FIG. 4A, the lens holder 121 is formed of a frame member having a substantially circular outline in a front view and having an opening 121a formed at the center. The opening 121a penetrates the lens holder 121 in the front-rear direction, and has a configuration in which two cylindrical holes having different diameters are arranged on the same axis. The diameter of the hole in front of the opening 121a is larger than the diameter of the hole in the rear, and a ring-shaped step is formed at the boundary where the diameter changes. The diameter of the hole in front of the opening 121a is slightly larger than the diameter of the large diameter portion 120a of the collimator lens 120. The collimator lens 120 is positioned with respect to the lens holder 121 by fitting the large diameter portion 120a into the opening 121a from the front side until the rear surface of the large diameter portion 120a of the collimator lens 120 contacts the step in the opening 121a. In this state, the collimator lens 120 is bonded and fixed to the lens holder 121.
　レンズホルダ１２１の上面には、前後に延びる凹部１２１ｃが形成されている。凹部１２１ｃには、前後に延びる凸部１２１ｄが形成されている。レンズホルダ１２１の側面には、それぞれ、コリメータレンズ１２０とレンズホルダ１２１を接着固定する際に接着剤を流入させるための２つの溝１２１ｂが形成されている。 On the upper surface of the lens holder 121, a recess 121c extending in the front-rear direction is formed. A convex part 121d extending in the front-rear direction is formed in the concave part 121c. On the side surfaces of the lens holder 121, two grooves 121 b are formed for allowing an adhesive to flow in when the collimator lens 120 and the lens holder 121 are bonded and fixed.
　レンズホルダ１２１の下側面には、左右方向（Ｘ軸方向）に直線状に延びる矩形状の溝１２１ｅが形成されている（図５（ｂ）参照）。この溝１２１ｅは、後述のように、レンズホルダ１２１の位置を前後方向（Ｚ軸方向）に調整する際に用いられる。なお、レンズホルダ１２１の周方向における凸部１２１ｄの中心と溝１２１ｅの中心は、互いに１８０度ずれた状態にある。したがって、凸部１２１ｄが真上を向くと、溝１２１ｅは真下を向く。 A rectangular groove 121e extending linearly in the left-right direction (X-axis direction) is formed on the lower surface of the lens holder 121 (see FIG. 5B). As will be described later, the groove 121e is used when the position of the lens holder 121 is adjusted in the front-rear direction (Z-axis direction). In addition, the center of the convex part 121d and the center of the groove 121e in the circumferential direction of the lens holder 121 are in a state shifted from each other by 180 degrees. Therefore, when the convex portion 121d faces right above, the groove 121e turns right below.
　ＤＯＥホルダ１４１は、下面に、ＤＯＥ１４０を装着するための段部（図示せず）が形成されている。また、ＤＯＥホルダ１４１の中央には、レーザ光を目標領域に導くための開口１４１ａが形成されている。ＤＯＥ１４０は、ＤＯＥホルダ１４１の下方向から、ＤＯＥホルダ１４１に嵌め込まれ、接着固定される。また、ＤＯＥホルダ１４１の左右の端部には、ＤＯＥホルダ１４１をハウジング１５０に固定するための段部１４１ｂが形成されている。 The DOE holder 141 has a step (not shown) for mounting the DOE 140 on the lower surface. In addition, an opening 141 a for guiding the laser beam to the target area is formed in the center of the DOE holder 141. The DOE 140 is fitted into the DOE holder 141 from below the DOE holder 141, and is fixed by adhesion. Further, step portions 141 b for fixing the DOE holder 141 to the housing 150 are formed at the left and right ends of the DOE holder 141.
　ハウジング１５０は、上面視において長方形の輪郭の、有底の枠部材からなっている。ハウジング１５０は、ネジ孔１５０ｉの形状を除いて、Ｙ－Ｚ平面に平行な面に対して左右対称な形状となっている。ハウジング１５０は、アルミ等の熱伝導性の高い物質からなり、一般的なダイカスト鋳造によって製造される。 The housing 150 is formed of a bottomed frame member having a rectangular outline in a top view. The housing 150 has a symmetrical shape with respect to a plane parallel to the YZ plane, except for the shape of the screw hole 150i. The housing 150 is made of a material having high thermal conductivity such as aluminum, and is manufactured by general die casting.
　ハウジング１５０の内部後側には、図示のごとく、ＹＺ平面の面内方向に４５°の傾いたミラー装着部１５０ａが形成されている。立ち上げミラー１３０は、ミラー装着部１５０ａに装着され、接着固定される。また、ハウジング１５０の前方の側面には、Ｕ字型の開口１５０ｂが形成されている。開口１５０ｂの左右方向の幅は、レーザ光源１１０のＣＡＮ１１０ｂの径よりも大きい。なお、本実施の形態では、ハウジング１５０は、ダイカスト鋳造にて製造されるため、１５０ｂは、円形の開口とするよりもＵ字型の開口としたほうが、金型からハウジング１５０を外すための可動駒が不要となり、製造コストを低減することができる。 As shown in the drawing, a mirror mounting portion 150a inclined by 45 ° in the in-plane direction of the YZ plane is formed on the inner rear side of the housing 150. The rising mirror 130 is mounted on the mirror mounting portion 150a and fixed by adhesion. Further, a U-shaped opening 150 b is formed on the front side surface of the housing 150. The width of the opening 150b in the left-right direction is larger than the diameter of the CAN 110b of the laser light source 110. In the present embodiment, since the housing 150 is manufactured by die casting, 150b is movable to remove the housing 150 from the mold when it is U-shaped rather than circular. A piece is not required, and the manufacturing cost can be reduced.
　ハウジング１５０の底面には、後述するＺ軸調整用治具６０１をレンズホルダ１２１の溝１２１ｅに案内するための孔１５０ｃが形成されている（図５（ｂ）参照）。孔１５０ｃの径は、レンズホルダ１２１の溝１２１ｅのＺ軸方向の幅よりも大きくなっている。ハウジング１５０の左右方向にならぶ２つの側面には、それぞれ、ハウジング１５０の内部にＵＶ接着剤を流入させるための２つの孔１５０ｅが形成されている。 On the bottom surface of the housing 150, a hole 150c for guiding a Z-axis adjusting jig 601 described later to the groove 121e of the lens holder 121 is formed (see FIG. 5B). The diameter of the hole 150c is larger than the width of the groove 121e of the lens holder 121 in the Z-axis direction. Two holes 150e for allowing the UV adhesive to flow into the interior of the housing 150 are formed in the two side surfaces of the housing 150 in the left-right direction.
　また、ハウジング１５０の左右方向にならぶ２つの内側面の下端には、互いに向き合う一対の傾斜面１５０ｄが形成されている。２つの傾斜面１５０ｄは、それぞれ、Ｘ－Ｚ平面に平行な面に対して下方向に同じ角度だけ傾いている。２つの傾斜面１５０ｄにレンズホルダ１２１を載せると、レンズホルダ１２１は、Ｘ軸方向（左右方向）において、変位が規制される。 Also, a pair of inclined surfaces 150d facing each other are formed at the lower ends of the two inner side surfaces of the housing 150 in the left-right direction. The two inclined surfaces 150d are inclined at the same angle in the downward direction with respect to the plane parallel to the XZ plane. When the lens holder 121 is placed on the two inclined surfaces 150d, the displacement of the lens holder 121 is restricted in the X-axis direction (left-right direction).
　ハウジング１５０の上面には、ＤＯＥホルダ１４１を装着するための段部１５０ｆと、４つのネジ穴１５０ｇが形成されている。Ｚ軸方向における段部１５０ｆの幅は、ＤＯＥホルダ１４１の左右の段部１４１ｂの幅よりも僅かに大きい。ハウジング１５０の左右方向にならぶ２つの外側面の下端には、ハウジング１５０の外側方向に突出した２つの鍔部１５０ｈが形成されている。２つの鍔部１５０ｈには、それぞれ、後述するベースプレート３００にハウジング１５０を固定するためのネジ孔１５０ｉが形成されている。 On the upper surface of the housing 150, a step 150f for mounting the DOE holder 141 and four screw holes 150g are formed. The width of the step portion 150f in the Z-axis direction is slightly larger than the width of the left and right step portions 141b of the DOE holder 141. Two flanges 150 h projecting in the outer direction of the housing 150 are formed at the lower ends of the two outer surfaces aligned in the left-right direction of the housing 150. Each of the two flanges 150h is formed with a screw hole 150i for fixing the housing 150 to the base plate 300 described later.
　押さえバネ１６０は、バネ性のある板ばねであり、中央に、一段低い段部１６０ａを有する。押さえバネ１６０は、左右対称な形状を有する。押さえバネ１６０には、押さえバネ１６０をハウジング１５０に上部から固定するための４つのネジ孔１６０ｂが形成されている。 The holding spring 160 is a leaf spring having a spring property, and has a step portion 160a that is one step lower in the center. The holding spring 160 has a symmetrical shape. The presser spring 160 is formed with four screw holes 160b for fixing the presser spring 160 to the housing 150 from above.
　発光装置１０の組立時には、まず、立ち上げミラー１３０が、ハウジング１５０内のミラー装着部１５０ａに装着される。これにより、立ち上げミラー１３０が、Ｘ－Ｚ平面に対してＹ－Ｚ平面の面内方向に４５度の傾きを持つように、ハウジング１５０内に設置される。 When assembling the light-emitting device 10, first, the rising mirror 130 is mounted on the mirror mounting portion 150 a in the housing 150. Accordingly, the rising mirror 130 is installed in the housing 150 so as to have an inclination of 45 degrees in the in-plane direction of the YZ plane with respect to the XZ plane.
　次に、コリメータレンズ１２０が装着されたレンズホルダ１２１が、溝１２１ｅと孔１５０ｃが合うように、一対の傾斜面１５０ｄ上に載せられ、ハウジング１５０の内部に収容される。このとき、凸部１２１ｄが真上を向くようにレンズホルダ１２１を傾斜面１５０ｄ上に載せることで、溝１２１ｅと孔１５０ｃとを整合させることができる。 Next, the lens holder 121 on which the collimator lens 120 is mounted is placed on the pair of inclined surfaces 150d so that the grooves 121e and the holes 150c are aligned, and is accommodated inside the housing 150. At this time, the groove 121e and the hole 150c can be aligned by placing the lens holder 121 on the inclined surface 150d so that the convex portion 121d faces right above.
　そして、押さえバネ１６０の４つのネジ孔１６０ｂがハウジング１５０の４つのネジ穴１５０ｇに合うように、押さえバネ１６０がハウジング１５０の上部に当てられる。この状態で、上方から、４つのネジ孔１６０ｂを介して、４つのネジ１６１が４つのネジ穴１５０ｇに螺着される。このとき、レンズホルダ１２１の凸部１２１ｄが、押さえバネ１６０の段部１６０ａによって、下方向に押し付けられる。これにより、レンズホルダ１２１は、押さえバネ１６０の付勢によって、ハウジング１５０の傾斜面１５０ｄに押し付けられ、Ｘ軸方向（左右方向）、Ｙ軸方向（上下方向）に動かないように仮固定される。 The pressing spring 160 is applied to the upper portion of the housing 150 so that the four screw holes 160b of the pressing spring 160 are aligned with the four screw holes 150g of the housing 150. In this state, four screws 161 are screwed into the four screw holes 150g from above through the four screw holes 160b. At this time, the convex portion 121 d of the lens holder 121 is pressed downward by the step portion 160 a of the pressing spring 160. Thereby, the lens holder 121 is pressed against the inclined surface 150d of the housing 150 by the urging force of the holding spring 160, and is temporarily fixed so as not to move in the X-axis direction (left-right direction) and the Y-axis direction (up-down direction). .
　なお、押さえバネ１６０がハウジング１５０に装着されると、凸部１２１ｄが段部１６０ａの真中に位置付けられ、押さえバネ１６０は段部１６０ａを中心として左右均等に撓む。このため、レンズホルダ１２１は、周方向に位置ずれを起こしにくくなる。また、凸部１２１ｄが段部１６０ａの真中からずれている場合は、凸部１２１ｄを目印として、凸部１２１ｄが段部１６０ａの真中に位置付けられるように、レンズホルダ１２１を周方向に回転させればよい。これにより、溝１２１ｅと孔１５０ｃとを整合させることができる（図５（ｂ）参照）。 When the holding spring 160 is mounted on the housing 150, the convex portion 121d is positioned in the middle of the stepped portion 160a, and the holding spring 160 bends evenly from side to side about the stepped portion 160a. For this reason, the lens holder 121 is less likely to be displaced in the circumferential direction. If the convex portion 121d is displaced from the middle of the step portion 160a, the lens holder 121 can be rotated in the circumferential direction so that the convex portion 121d is positioned in the middle of the step portion 160a with the convex portion 121d as a mark. That's fine. Thereby, the groove | channel 121e and the hole 150c can be aligned (refer FIG.5 (b)).
　こうしてレンズホルダ１２１がハウジング１５０に仮固定されると、レンズホルダ１２１と、ハウジング１５０の内側面の間には、レンズホルダ１２１がＺ軸方向（前後方向）に移動可能なように、所定の隙間が存在する。なお、レンズホルダ１２１とハウジング１５０との位置関係については、追って、図９、図１０を参照して説明する。 When the lens holder 121 is temporarily fixed to the housing 150 in this way, a predetermined gap is provided between the lens holder 121 and the inner surface of the housing 150 so that the lens holder 121 can move in the Z-axis direction (front-rear direction). Exists. The positional relationship between the lens holder 121 and the housing 150 will be described later with reference to FIGS. 9 and 10.
　次に、レーザ光源１１０のＣＡＮ１１０ｂがハウジング１５０のＵ字型の開口１５０ｂに挿入されるよう、レーザホルダ１１１の後面がハウジング１５０に外側面に当てられる。このとき、ハウジング１５０に当接するのは、同図（ｂ）に示すレーザホルダ１１１の段部１１１ｂのうち、上側の段部１１１ｂを除く３つの段部１１１ｂである。レーザ光源１１０のＣＡＮ１１０ｂとハウジング１５０の開口１５０ｂとの間には、レーザ光源１１０がＸＹ軸方向（上下左右方向）に移動可能なように、所定の隙間が存在する。なお、レーザホルダ１１１とハウジング１５０との位置関係については、追って、図９、図１０を参照して説明する。 Next, the rear surface of the laser holder 111 is brought into contact with the outer surface of the housing 150 so that the CAN 110b of the laser light source 110 is inserted into the U-shaped opening 150b of the housing 150. At this time, the three steps 111b excluding the upper step 111b among the steps 111b of the laser holder 111 shown in FIG. A predetermined gap exists between the CAN 110b of the laser light source 110 and the opening 150b of the housing 150 so that the laser light source 110 can move in the XY axis direction (up / down / left / right direction). The positional relationship between the laser holder 111 and the housing 150 will be described later with reference to FIGS.
　この状態で、ＸＹ軸調整用治具（図示せず）により、レーザホルダ１１１をハウジング１５０に押し付けつつ、レーザ光源１１０がＸＹ軸方向（上下左右方向）に変位され、ＸＹ軸方向（上下左右方向）の位置調整が行われる。これにより、レーザ光源１１０の光軸とコリメータレンズ１２０の光軸が整合する。また、ハウジング１５０の下部に形成された孔１５０ｃを介して、レンズホルダ１２１の溝１２１ｅにＺ軸調整用治具（図４には図示せず）が係合され、レンズホルダ１２１のＺ軸方向（前後方向）の位置調整が行われる。これにより、コリメータレンズ１２０の焦点位置がレーザ光源１１０の発光点に対して適正に位置付けられる。 In this state, while the laser holder 111 is pressed against the housing 150 by an XY axis adjusting jig (not shown), the laser light source 110 is displaced in the XY axis direction (up / down / left / right direction), and the XY axis direction (up / down / left / right direction). ) Is adjusted. As a result, the optical axis of the laser light source 110 and the optical axis of the collimator lens 120 are aligned. Further, a Z-axis adjusting jig (not shown in FIG. 4) is engaged with the groove 121e of the lens holder 121 through a hole 150c formed in the lower portion of the housing 150, so that the lens holder 121 has a Z-axis direction. Position adjustment in the (front-rear direction) is performed. Thereby, the focal position of the collimator lens 120 is appropriately positioned with respect to the light emitting point of the laser light source 110.
　以上の位置調整によって、目標領域において所望のドットパターンが得られるようになる。なお、ＸＹＺ軸方向の位置調整については、追って、図１１、図１２を参照して説明する。 By the above position adjustment, a desired dot pattern can be obtained in the target area. Note that the position adjustment in the XYZ axis directions will be described later with reference to FIGS.
　こうして位置調整がなされた後、レーザホルダ１１１の左右の２つの側面とハウジング１５０の側面との境界に、左右均等にＵＶ接着剤が添着される。ＵＶ接着剤が添着された後、再度、レーザ光の光軸のずれが確認され、問題なければ、ＵＶ接着剤に紫外線が照射されて、レーザホルダ１１１がハウジング１５０に接着固定される。なお、レーザ光の光軸のずれの確認において問題があった場合には、再度、レーザホルダ１１１が微調整された後に、ＵＶ接着剤に紫外線が照射され、レーザホルダ１１１がハウジング１５０に接着固定される。 After the position adjustment is made in this way, the UV adhesive is evenly attached to the boundary between the two left and right side surfaces of the laser holder 111 and the side surface of the housing 150. After the UV adhesive is attached, the deviation of the optical axis of the laser light is confirmed again. If there is no problem, the UV adhesive is irradiated with ultraviolet rays, and the laser holder 111 is bonded and fixed to the housing 150. If there is a problem in confirming the deviation of the optical axis of the laser beam, the laser holder 111 is finely adjusted again, and then the UV adhesive is irradiated with ultraviolet rays, and the laser holder 111 is bonded and fixed to the housing 150. Is done.
　さらに、ハウジング１５０の左右の側面に形成された孔１５０ｅを介して、レンズホルダ１２１とハウジング１５０内部の傾斜面１５０ｄとが互いに当接する位置に、左右均等にＵＶ接着剤が添着される。ＵＶ接着剤が添着された後、再度、レーザ光源１１０とコリメータレンズ１２０の位置関係が確認され、問題なければ、ＵＶ接着剤に紫外線が照射されて、レンズホルダ１２１がハウジング１５０に接着固定される。なお、レーザ光源１１０とコリメータレンズ１２０の位置関係の確認において問題があった場合には、再度、レンズホルダ１２１が微調整された後に、ＵＶ接着剤に紫外線が照射され、レンズホルダ１２１がハウジング１５０に接着固定される。このように、本実施の形態では、ハウジング１５０の側面に孔１５０ｅが形成されているため、ハウジング１５０内部に収容されたレンズホルダ１２１を容易にハウジング１５０に接着固定できる。 Further, the UV adhesive is evenly attached to the left and right at the positions where the lens holder 121 and the inclined surface 150d inside the housing 150 are in contact with each other through the holes 150e formed on the left and right side surfaces of the housing 150. After the UV adhesive is attached, the positional relationship between the laser light source 110 and the collimator lens 120 is confirmed again. If there is no problem, the UV adhesive is irradiated with ultraviolet rays, and the lens holder 121 is bonded and fixed to the housing 150. . If there is a problem in confirming the positional relationship between the laser light source 110 and the collimator lens 120, the lens holder 121 is finely adjusted again, and then the UV adhesive is irradiated with ultraviolet rays. Adhered and fixed to. Thus, in this embodiment, since the hole 150e is formed on the side surface of the housing 150, the lens holder 121 housed in the housing 150 can be easily bonded and fixed to the housing 150.
　こうして、ハウジング１５０に対するレーザ光源１１０とコリメータレンズ１２０の設置が完了した後、ＤＯＥ１４０が装着されたＤＯＥホルダ１４１の段部１４１ｂがハウジング１５０の段部１５０ｆが嵌め込まれ、ＤＯＥホルダ１４１がハウジング１５０に固着される。こうして、図５（ａ）に示すように、発光装置１０の組立が完了する。図５（ａ）は、発光装置１０を上方向から見た斜視図、図５（ｂ）は、発光装置１０を下方向から見た斜視図である。 Thus, after the installation of the laser light source 110 and the collimator lens 120 to the housing 150 is completed, the step portion 141b of the DOE holder 141 to which the DOE 140 is attached is fitted into the step portion 150f of the housing 150, and the DOE holder 141 is fixed to the housing 150. Is done. In this way, assembling of the light emitting device 10 is completed as shown in FIG. FIG. 5A is a perspective view of the light emitting device 10 viewed from above, and FIG. 5B is a perspective view of the light emitting device 10 viewed from below.
　図６ないし図８は、情報取得装置１の組立過程を示す斜視図である。なお、便宜上、受光装置２０の組立過程と受光装置２０のベースプレート３００への装着過程は図示を省略する。受光装置２０は、図２中の受光光学系２００が他の部品とともにユニット化された装置である。 6 to 8 are perspective views showing an assembling process of the information acquisition device 1. For convenience, the assembly process of the light receiving device 20 and the mounting process of the light receiving device 20 to the base plate 300 are not shown. The light receiving device 20 is a device in which the light receiving optical system 200 in FIG. 2 is unitized with other components.
　図６において、３００は、発光装置１０と受光装置２０を支持するベースプレートである。 In FIG. 6, reference numeral 300 denotes a base plate that supports the light emitting device 10 and the light receiving device 20.
　ベースプレート３００には、発光装置１０と受光装置２０が配置される。ベースプレート３００は、長方形の板状であり、ステンレス等の耐可撓性に優れ、熱伝導性の高い物質からなる。ベースプレート３００には、発光装置１０をベースプレート３００に固定するための２つのネジ穴３００ａが形成されている。また、ベースプレート３００には、発光装置１０の設置位置を決める段部３０１が形成されている。発光装置１０の設置位置は、あらかじめ、発光装置１０の発光中心と受光装置２０の受光中心が、互いにＺ軸方向に並ぶように設定される。 The light emitting device 10 and the light receiving device 20 are arranged on the base plate 300. The base plate 300 has a rectangular plate shape, and is made of a material having excellent flexibility resistance and high thermal conductivity such as stainless steel. Two screw holes 300 a for fixing the light emitting device 10 to the base plate 300 are formed in the base plate 300. Further, the base plate 300 is formed with a step portion 301 that determines the installation position of the light emitting device 10. The installation position of the light emitting device 10 is set in advance so that the light emitting center of the light emitting device 10 and the light receiving center of the light receiving device 20 are aligned in the Z-axis direction.
　また、発光装置１０と受光装置２０の設置間隔は、情報取得装置１と目標領域の基準面との距離に応じて、設定される。基準面は、どの程度離れた目標物を検出対象とするかによって、情報取得装置１との距離が変わる。検出対象の目標物までの距離が近くなるほど、発光装置１０と受光装置２０の設置間隔は狭くなる。逆に、検出対象の目標物までの距離が遠くなるほど、発光装置１０と受光装置２０の設置間隔は広くなる。 Also, the installation interval between the light emitting device 10 and the light receiving device 20 is set according to the distance between the information acquisition device 1 and the reference plane of the target area. The distance between the reference plane and the information acquisition apparatus 1 varies depending on how far away the target is to be detected. The closer the distance to the target to be detected is, the narrower the interval between the light emitting device 10 and the light receiving device 20 is. Conversely, as the distance to the target to be detected increases, the installation interval between the light emitting device 10 and the light receiving device 20 increases.
　ベースプレート３００の中央下部には、レーザ光源１１０の配線をベースプレート３００の背部に取り出すための孔３０２が形成されている。また、ベースプレート３００の受光装置２０の設置位置の下部には、受光装置２０のコネクタ２０２をベースプレート３００の背部に露出させるための開口３０３が形成されている。さらに、ベースプレート３００には、図示のごとく、鍔部３０４が形成されており、鍔部３０４には、後述するカバー４００をベースプレート３００に固定するためのネジ穴３０４ａが形成されている。 The hole 302 for taking out the wiring of the laser light source 110 to the back part of the base plate 300 is formed in the center lower part of the base plate 300. In addition, an opening 303 for exposing the connector 202 of the light receiving device 20 to the back portion of the base plate 300 is formed below the installation position of the light receiving device 20 on the base plate 300. Further, as shown in the figure, a flange 304 is formed in the base plate 300, and a screw hole 304 a for fixing a cover 400 described later to the base plate 300 is formed in the flange 304.
　受光装置２０は、図２で示したように、フィルタ２１０と、アパーチャ２２０と、撮像レンズ２３０と、ＣＭＯＳイメージセンサ２４０とを備えている。受光装置２０は、基板固定部２０１により、ベースプレート３００に固定されている。ベースプレート３００の背面には、ベースプレート３００に形成された開口３０３を介して、受光装置２０のコネクタ２０２が露出している。 The light receiving device 20 includes a filter 210, an aperture 220, an imaging lens 230, and a CMOS image sensor 240 as shown in FIG. The light receiving device 20 is fixed to the base plate 300 by the substrate fixing unit 201. The connector 202 of the light receiving device 20 is exposed on the back surface of the base plate 300 through an opening 303 formed in the base plate 300.
　発光装置１０は、ハウジング１５０の側面がベースプレート３００の段部３０１に当接するように、配置される。この状態で、２つのネジ穴３００ａと２つのネジ孔１５０ｉとが合わされ、２つのネジ３０５がそれぞれネジ孔１５０ｉとネジ穴３００ａに螺着される。これにより、発光装置１０が、ベースプレート３００に固着される。 The light emitting device 10 is arranged so that the side surface of the housing 150 abuts on the step portion 301 of the base plate 300. In this state, the two screw holes 300a and the two screw holes 150i are combined, and the two screws 305 are screwed into the screw holes 150i and the screw holes 300a, respectively. Thereby, the light emitting device 10 is fixed to the base plate 300.
　こうして、図７に示す構成体が組み立てられる。その後、この構成体にカバー４００が装着される（図８）。このとき、ベースプレート３００のネジ穴３０４ａと、カバー４００のネジ孔４００ａが合わされ、カバー４００がベースプレート３００にネジ止めされる。これにより、図８に示す構成体の組立が完了する。図８（ａ）は、この構成体を前面から見た斜視図であり、図８（ｂ）は、この構成体を背面から見た斜視図である。 Thus, the structure shown in FIG. 7 is assembled. Thereafter, the cover 400 is attached to the structure (FIG. 8). At this time, the screw hole 304 a of the base plate 300 and the screw hole 400 a of the cover 400 are combined, and the cover 400 is screwed to the base plate 300. Thereby, the assembly of the structure shown in FIG. 8 is completed. FIG. 8A is a perspective view of the structure viewed from the front, and FIG. 8B is a perspective view of the structure viewed from the back.
　カバー４００の前面には、発光装置１０から出射された光を目標物に導くための投射窓４０１と、目標物からの反射光を受光装置２０に導くための受光窓４０２が形成されている。ベースプレート３００の背面には、さらに、回路基板５００が設置される（図示せず）。この回路基板５００に対し、ベースプレート３００の背部に形成された孔３０２を介して、レーザ光源１１０が接続される。また、回路基板５００は、ベースプレート３００の背部に形成された開口３０３を介して、受光装置２０のコネクタ２０２と接続される。回路基板５００には、図２に示すＣＰＵ２１やレーザ駆動回路２２等の情報取得装置１の回路部が実装されている。 A projection window 401 for guiding the light emitted from the light emitting device 10 to the target and a light receiving window 402 for guiding the reflected light from the target to the light receiving device 20 are formed on the front surface of the cover 400. A circuit board 500 is further installed on the back surface of the base plate 300 (not shown). The laser light source 110 is connected to the circuit board 500 through a hole 302 formed in the back portion of the base plate 300. In addition, the circuit board 500 is connected to the connector 202 of the light receiving device 20 through an opening 303 formed in the back portion of the base plate 300. The circuit board 500 is mounted with a circuit unit of the information acquisition device 1 such as the CPU 21 and the laser driving circuit 22 shown in FIG.
　図９、図１０は、ハウジング１５０内部の各部材の位置関係を説明する図である。図９（ａ）は、発光装置１０の上面図、図９（ｂ）は、図９（ａ）のＡ－Ａ断面図である。図１０（ａ）は、発光装置１０の側面図、図１０（ｂ）は、図１０（ａ）のＢ－Ｂ断面図である。 FIG. 9 and FIG. 10 are diagrams for explaining the positional relationship of each member inside the housing 150. 9A is a top view of the light-emitting device 10, and FIG. 9B is a cross-sectional view taken along the line AA of FIG. 9A. 10A is a side view of the light-emitting device 10, and FIG. 10B is a cross-sectional view taken along the line BB of FIG. 10A.
　図９（ｂ）を参照して、レンズホルダ１２１は、Ｚ軸正方向において、ＤＯＥホルダ１４１およびミラー装着部１５０ａとの間に所定の隙間を有している（図中破線）。また、レンズホルダ１２１は、Ｚ軸負方向において、ハウジング１５０のレーザホルダ１１１と当接する内側面との間に所定の隙間を有している（図中破線）。さらに、押さえバネ１６０の段部１６０ａは、レンズホルダ１２１の凹部１２１ｃよりも小さい幅であり、段部１６０ａと、レンズホルダ１２１との間に所定の隙間が存在している（図中破線）。 Referring to FIG. 9B, the lens holder 121 has a predetermined gap between the DOE holder 141 and the mirror mounting portion 150a in the positive Z-axis direction (broken line in the figure). In addition, the lens holder 121 has a predetermined gap between the inner surface of the housing 150 that contacts the laser holder 111 in the negative Z-axis direction (broken line in the figure). Further, the step portion 160a of the holding spring 160 has a smaller width than the concave portion 121c of the lens holder 121, and a predetermined gap exists between the step portion 160a and the lens holder 121 (broken line in the figure).
　また、レンズホルダ１２１は、Ｙ軸負方向において、傾斜面１５０ｄに当接しており、Ｙ軸正方向から、押さえバネ１６０の段部１６０ａによって、押し付けられているため、Ｙ軸方向には移動しない。なお、レンズホルダ１２１は、ＸＹ平面における断面が略円形であるため、レンズホルダ１２１と傾斜面１５０ｄとの接触面積は小さく、レンズホルダ１２１と傾斜面１５０ｄとの間に発生する摩擦力は小さい。また、押さえバネ１６０は、レンズホルダ１２１上面の凸部１２１ｄに接触し、押さえバネ１６０と凸部１２１ｄとの接触面積は小さいため、押さえバネ１６０と凸部１２１ｄとの間に発生する摩擦力は小さい。 Further, since the lens holder 121 is in contact with the inclined surface 150d in the negative Y-axis direction and is pressed by the step portion 160a of the pressing spring 160 from the positive Y-axis direction, it does not move in the Y-axis direction. . Since the lens holder 121 has a substantially circular cross section in the XY plane, the contact area between the lens holder 121 and the inclined surface 150d is small, and the frictional force generated between the lens holder 121 and the inclined surface 150d is small. In addition, since the pressing spring 160 contacts the convex portion 121d on the upper surface of the lens holder 121 and the contact area between the pressing spring 160 and the convex portion 121d is small, the frictional force generated between the pressing spring 160 and the convex portion 121d is small.
　したがって、図１１で後述する方法によって、レンズホルダ１２１にＺ軸方向に力を加えると、押さえバネ１６０の付勢により、ハウジング１５０の傾斜面１５０ｄに押し付けられながら、Ｚ軸方向に滑らか、かつ安定的にレンズホルダ１２１を可動させることができる。 Accordingly, when a force is applied to the lens holder 121 in the Z-axis direction by a method described later with reference to FIG. 11, the pressing spring 160 is urged against the inclined surface 150 d of the housing 150 and is smooth and stable in the Z-axis direction. In particular, the lens holder 121 can be moved.
　また、レーザホルダ１１１の下側の段部１１１ｂがハウジング１５０のＵ字型の開口１５０ｂが形成された外側面と当接している。また、レーザホルダ１１１に装着されたレーザ光源１１０のＣＡＮ１１０ｂは、Ｙ軸負方向において、ハウジング１５０のＵ字型の開口１５０ｂの内側面との間に、所定の隙間を有している（図中破線）。 Also, the lower step portion 111b of the laser holder 111 is in contact with the outer surface of the housing 150 where the U-shaped opening 150b is formed. The CAN 110b of the laser light source 110 attached to the laser holder 111 has a predetermined gap between the inner surface of the U-shaped opening 150b of the housing 150 in the negative Y-axis direction (in the drawing). Dashed line).
　図１０（ｂ）を参照して、レーザホルダ１１１の左右の段部１１１ｂがハウジング１５０のＵ字型の開口１５０ｂが形成された外側面と当接している。また、レーザホルダ１１１に装着されたレーザ光源１１０のＣＡＮ１１０ｂは、Ｘ軸正方向とＸ軸負方向において、ハウジング１５０のＵ字型の開口１５０ｂの内側面との間に、所定の隙間を有している（図中破線）。 Referring to FIG. 10 (b), the left and right step portions 111b of the laser holder 111 are in contact with the outer surface of the housing 150 where the U-shaped opening 150b is formed. The CAN 110b of the laser light source 110 attached to the laser holder 111 has a predetermined gap between the inner surface of the U-shaped opening 150b of the housing 150 in the X-axis positive direction and the X-axis negative direction. (Dashed line in the figure).
　したがって、図１２で後述する方法によって、レーザホルダ１１１の３つの段部１１１ｂをハウジング１５０の外側面に押し付けながら、Ｘ軸方向、Ｙ軸方向に力を加えると、これらの隙間においてレーザホルダ１１１をＸ軸方向、およびＹ軸方向に移動させることができる。 Accordingly, when a force is applied in the X-axis direction and the Y-axis direction while pressing the three step portions 111b of the laser holder 111 against the outer surface of the housing 150 by the method described later in FIG. It can be moved in the X-axis direction and the Y-axis direction.
　図１１は、レンズホルダ１２１をＺ軸方向に調整する方法を説明する模式図である。同図（ａ）は、ハウジング１５０を背面からみた斜視図、同図（ｂ）は、偏心ピン６０１ａの回転とレンズホルダ１２１への力の関係を示す図、同図（ｃ）は、図９（ａ）におけるＡ－Ａ断面図である。便宜上、同図（ｃ）にはハッチが省略されている。 FIG. 11 is a schematic diagram for explaining a method of adjusting the lens holder 121 in the Z-axis direction. FIG. 10A is a perspective view of the housing 150 as viewed from the back, FIG. 10B is a diagram showing the relationship between the rotation of the eccentric pin 601a and the force applied to the lens holder 121, and FIG. It is AA sectional drawing in (a). For convenience, hatching is omitted in FIG.
　図１１（ａ）には、レンズホルダ１２１をＺ軸方向に調整するためのＺ軸調整用治具６０１が示されている。Ｚ軸調整用治具６０１は、ハウジング１５０の孔１５０ｃよりも径が小さい円筒状の形状をしており、先端面において、Ｚ軸調整用治具６０１の回転の中心から偏った位置に偏心ピン６０１ａが突設されている。偏心ピン６０１ａは、溝１２１ｅのＺ軸方向の幅よりも小さい径の円筒状である。 FIG. 11A shows a Z-axis adjustment jig 601 for adjusting the lens holder 121 in the Z-axis direction. The Z-axis adjustment jig 601 has a cylindrical shape whose diameter is smaller than that of the hole 150c of the housing 150, and an eccentric pin at a position deviated from the center of rotation of the Z-axis adjustment jig 601 on the front end surface. 601a protrudes. The eccentric pin 601a has a cylindrical shape with a diameter smaller than the width of the groove 121e in the Z-axis direction.
　調整時には、まず、Ｚ軸調整用治具６０１は、ハウジング１５０の背部に形成された孔１５０ｃを介して、レンズホルダ１２１の溝１２１ｅに、Ｚ軸調整用治具６０１の偏心ピン６０１ａを差し込むようにして嵌合させる。 At the time of adjustment, first, the Z-axis adjustment jig 601 inserts the eccentric pin 601a of the Z-axis adjustment jig 601 into the groove 121e of the lens holder 121 through the hole 150c formed in the back portion of the housing 150. And fit.
　この状態で、Ｚ軸調整用治具６０１を点線矢印の方向に回転させると、同図（ｂ）に示すように、偏心ピン６０１ａは、Ｚ軸調整用治具６０１の回転軸を中心として、回動する（図中点線）。偏心ピン６０１ａの回動に伴い、偏心ピン６０１ａが溝１２１ｅをＺ軸負方向に押し、レンズホルダ１２１がＺ軸負方向に移動される。このとき、偏心ピン６０１ａは、円軌道で回動するため、Ｘ軸方向にも力が発生するが、前述のとおり、レンズホルダ１２１は、傾斜面１５０ｄに当接することによってＸ軸方向の移動が規制されているため、Ｘ軸方向には移動されない。偏心ピン６０１ａは、溝１２１ｅの幅よりも十分小さい径（半分程度）であるため、レンズホルダ１２１に対するＸ軸方向への力が大きく掛からず、円滑にＺ軸調整用治具６０１を回動させることができる。 When the Z-axis adjustment jig 601 is rotated in the direction of the dotted arrow in this state, the eccentric pin 601a is centered on the rotation axis of the Z-axis adjustment jig 601 as shown in FIG. It rotates (dotted line in the figure). As the eccentric pin 601a rotates, the eccentric pin 601a pushes the groove 121e in the Z-axis negative direction, and the lens holder 121 is moved in the Z-axis negative direction. At this time, since the eccentric pin 601a rotates in a circular orbit, a force is also generated in the X-axis direction. As described above, the lens holder 121 moves in the X-axis direction by contacting the inclined surface 150d. Since it is regulated, it is not moved in the X-axis direction. Since the eccentric pin 601a has a diameter (about half) sufficiently smaller than the width of the groove 121e, a force in the X-axis direction with respect to the lens holder 121 is not greatly applied, and the Z-axis adjustment jig 601 is smoothly rotated. be able to.
　なお、偏心ピン６０１ａにて、レンズホルダ１２１をＺ軸方向に円滑に移動させるためには、レンズホルダ１２１に形成された溝１２１ｅが孔１５０ｃの直径の位置にあり、且つ、溝１２１ｅが孔１５０ｃの直径の全長に亘って孔１５０ｃから外部に臨むのが望ましい。調整時に偏心ピン６０１ａを半周させる必要がある場合には、少なくとも、溝１２１ｅのＸ軸方向の長さが、偏心ピン６０１ａの円軌道（同図（ｂ）中点線）の直径よりも大きい必要がある。 In order to smoothly move the lens holder 121 in the Z-axis direction with the eccentric pin 601a, the groove 121e formed in the lens holder 121 is positioned at the diameter of the hole 150c, and the groove 121e is the hole 150c. It is desirable to face the outside from the hole 150c over the entire length of the diameter. When it is necessary to make the eccentric pin 601a half-round at the time of adjustment, at least the length of the groove 121e in the X-axis direction needs to be larger than the diameter of the circular orbit of the eccentric pin 601a (the middle dotted line in FIG. 5B). is there.
　図１１（ｃ）を参照して、Ｚ軸調整用治具６０１をレンズホルダ１２１の溝１２１ｅに嵌合させて、点線矢印の方向に回転させることで、レンズホルダ１２１の位置を、Ｚ軸正負の方向（図中矢印方向）に調整することができる。こうして、レーザ光源１１０とコリメータレンズ１２０との間の距離を、容易に調整することができる。 Referring to FIG. 11C, the Z-axis adjusting jig 601 is fitted in the groove 121e of the lens holder 121 and rotated in the direction of the dotted arrow, so that the position of the lens holder 121 is changed to the positive / negative of the Z-axis. It is possible to adjust in the direction (arrow direction in the figure). In this way, the distance between the laser light source 110 and the collimator lens 120 can be easily adjusted.
　図１２は、レーザホルダ１１１をＸ軸方向、Ｙ軸方向に調整する方法を説明する模式図である。同図（ａ）は、Ｙ軸方向の調整方法を説明する図、同図（ｂ）は、Ｘ軸方向の調整方法を説明する図である。図１２（ａ）は、図９（ａ）におけるＡ－Ａ断面図、図１２（ｂ）は、図１０（ａ）におけるＢ－Ｂ断面図である。便宜上、図１２（ａ）、（ｂ）にはハッチが省略されている。 FIG. 12 is a schematic diagram for explaining a method of adjusting the laser holder 111 in the X-axis direction and the Y-axis direction. FIG. 4A is a diagram for explaining an adjustment method in the Y-axis direction, and FIG. 4B is a diagram for explaining an adjustment method in the X-axis direction. 12A is a cross-sectional view taken along the line AA in FIG. 9A, and FIG. 12B is a cross-sectional view taken along the line BB in FIG. 10A. For convenience, hatches are omitted from FIGS. 12 (a) and 12 (b).
　図１２（ａ）、（ｂ）を参照して、前述のとおり、レーザ光源１１０のＣＡＮ１１０ｂとハウジング１５０の開口１５０ｂの内側面には、所定の隙間が存在する（図中破線）。また、レーザホルダ１１１の段部１１１ｂは、ハウジング１５０の開口１５０ｂが形成された外側面と当接している。 Referring to FIGS. 12A and 12B, as described above, there is a predetermined gap between the CAN 110b of the laser light source 110 and the inner surface of the opening 150b of the housing 150 (broken line in the figure). Further, the stepped portion 111b of the laser holder 111 is in contact with the outer surface of the housing 150 where the opening 150b is formed.
　この状態で、ＸＹ軸調整用治具（図示せず）を用いて、図中上方（Ｚ軸負方向）からレーザホルダ１１１を、ハウジング１５０の外側面に押しつけつつ、Ｙ軸方向（図１２（ａ）の矢印方向）およびＸ軸方向（図１２（ｂ）の矢印方向）に移動させる。これにより、容易に、レーザ光源１１０とコリメータレンズ１２０の光軸を合わせるよう調整することができる。 In this state, using an XY-axis adjustment jig (not shown), the laser holder 111 is pressed against the outer surface of the housing 150 from above (Z-axis negative direction) in the figure, while in the Y-axis direction (FIG. (a) arrow direction) and the X-axis direction (arrow direction in FIG. 12B). Thereby, it can adjust easily so that the optical axis of the laser light source 110 and the collimator lens 120 may be match | combined.
　なお、ＸＹ軸調整用治具には、ＸＹＺ軸にて駆動可能な精密ステージを用いたものや、ＸＹ軸に駆動可能な精密ステージとＺ軸方向にばね性をもつ機構とを組み合わせたものなどが用いられる。 Note that the XY axis adjustment jig uses a precision stage that can be driven by the XYZ axes, or a combination of a precision stage that can be driven by the XY axes and a mechanism that has a spring property in the Z axis direction. Is used.
　レーザ光源１１０とコリメータレンズ１２０の位置調整は、たとえば、ＤＯＥホルダ１４１をハウジング１５０に装着する前の状態において、レーザ光源１１０を駆動してレーザ光を出射させ、そのときにミラー１３０によって反射されたレーザ光のビームを測定することによって行われる。この場合、まず、レーザ光のビームプロファイルが最良となるように、レーザホルダ１１１のＸＹ軸方向の調整が行われる。次に、レーザ光のビームサイズが最良となるように、コリメータレンズ１２０のＺ軸方向の位置調整が行われる。かかる調整の後、ＤＯＥホルダ１４１がハウジング１５０に装着される。 The position adjustment of the laser light source 110 and the collimator lens 120 is performed, for example, by driving the laser light source 110 and emitting the laser light before the DOE holder 141 is mounted on the housing 150, and then reflected by the mirror 130. This is done by measuring the beam of laser light. In this case, first, the laser holder 111 is adjusted in the X and Y axis directions so that the beam profile of the laser beam is the best. Next, the position adjustment of the collimator lens 120 in the Z-axis direction is performed so that the beam size of the laser beam becomes the best. After such adjustment, the DOE holder 141 is attached to the housing 150.
　以上、本実施の形態によれば、レーザ光源１１０をＸ軸方向、Ｙ軸方向に容易に位置調整することができ、また、コリメータレンズ１２０をＺ軸方向に容易に位置調整することができる。これにより、コリメータレンズ１２０やレーザ光源１１０の設置位置がずれた場合においても、精度よく容易に位置調整を行うことができる。 As described above, according to the present embodiment, the position of the laser light source 110 can be easily adjusted in the X-axis direction and the Y-axis direction, and the collimator lens 120 can be easily adjusted in the Z-axis direction. Thereby, even when the installation positions of the collimator lens 120 and the laser light source 110 are shifted, the position can be adjusted easily with high accuracy.
　また、レンズホルダ１２１は、ＸＹ平面における断面が略円形であるため、レンズホルダ１２１と傾斜面１５０ｄとの接触面積は小さく、レンズホルダ１２１と傾斜面１５０ｄとの間に発生する摩擦力は小さい。また、凸部１２１ｄに押さえバネ１６０の段部１６０ａが押しつけられるため、凸部１２１ｄと段部１６０ａとの接触面積は小さく、レンズホルダ１２１と押さえバネ１６０との間に発生する摩擦力は小さい。よって、押さえバネ１６０の付勢により、ハウジング１５０の傾斜面１５０ｄにレンズホルダ１２１を押し付けられながら、Ｚ軸方向に滑らかに、かつ安定的に、レンズホルダ１２１を移動させることができる。 Further, since the lens holder 121 has a substantially circular cross section in the XY plane, the contact area between the lens holder 121 and the inclined surface 150d is small, and the frictional force generated between the lens holder 121 and the inclined surface 150d is small. Further, since the step portion 160a of the pressing spring 160 is pressed against the convex portion 121d, the contact area between the convex portion 121d and the step portion 160a is small, and the frictional force generated between the lens holder 121 and the pressing spring 160 is small. Therefore, the lens holder 121 can be moved smoothly and stably in the Z-axis direction while the lens holder 121 is pressed against the inclined surface 150d of the housing 150 by the urging of the holding spring 160.
　また、本実施の形態によれば、前後に延びる凸部１２１ｄが真上を向くようにレンズホルダ１２１をハウジング１５０に収容することで、図５（ｂ）のように、孔１５０ｃと溝１２１ｅとを整合させることができる。また、押さえバネ１６０をハウジング１５０に装着すると、凸部１２１ｄを頂点として押さえバネ１６０が左右均等に撓むため、周方向におけるレンズホルダ１２１のずれを抑制することができる。 In addition, according to the present embodiment, the lens holder 121 is accommodated in the housing 150 so that the convex part 121d extending in the front-rear direction faces upward, and as shown in FIG. 5B, the hole 150c and the groove 121e Can be matched. Further, when the pressing spring 160 is mounted on the housing 150, the pressing spring 160 bends evenly on the left and right with the convex portion 121d as the apex, so that the displacement of the lens holder 121 in the circumferential direction can be suppressed.
　また、本実施の形態によれば、レーザホルダ１１１の背面に段部１１１ｂが設けられているため、レーザホルダ１１１とハウジング１５０の外側面の当接範囲を制限でき、ＸＹ軸方向におけるレーザホルダ１１１の位置調整を円滑かつ安定的に行うことができる。 In addition, according to the present embodiment, since the step portion 111b is provided on the back surface of the laser holder 111, the contact range between the laser holder 111 and the outer surface of the housing 150 can be limited, and the laser holder 111 in the XY axis direction. Can be adjusted smoothly and stably.
　また、本実施の形態によれば、ハウジング１５０の開口１５０ｂがＵ字型に形成されているため、ダイカスト鋳造において、金型からハウジング１５０を容易に取り外すことができる。よって、製造コストを削減することができる。 Further, according to the present embodiment, since the opening 150b of the housing 150 is formed in a U-shape, the housing 150 can be easily detached from the mold in die casting. Therefore, manufacturing cost can be reduced.
　さらに、本実施の形態によれば、偏心ピン６０１ａを溝１２１ｅに係合させて回転させるといった簡易な作業により、コリメータレンズ１２０の位置調整を行うことができる。 Furthermore, according to the present embodiment, the position of the collimator lens 120 can be adjusted by a simple operation of engaging the eccentric pin 601a with the groove 121e and rotating it.
　以上、本発明の実施の形態について説明したが、本発明は、上記実施の形態に何ら制限されるものではなく、また、本発明の実施の形態も上記の他に種々の変更が可能である。 Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made to the embodiment of the present invention in addition to the above. .
　たとえば、上記実施の形態では、発光装置１０の光学系として、レーザ光源１１０から出射されたレーザ光の光路が立ち上げミラー１３０によって折り曲げられる構成が示されたが、レーザ光源１１０から出射されたレーザ光の光路が折り曲げられずに、そのままＤＯＥ１４０へと向かうように構成されても良い。この場合、立ち上げミラー１３０は不要となり、たとえば、立ち上げミラー１３０の位置に開口とＤＯＥが設置される。 For example, in the above embodiment, the optical system of the light emitting device 10 is configured such that the optical path of the laser light emitted from the laser light source 110 is bent by the rising mirror 130, but the laser emitted from the laser light source 110 is shown. The light path may be configured to be directed to the DOE 140 without being bent. In this case, the raising mirror 130 becomes unnecessary, and for example, an opening and a DOE are installed at the position of the raising mirror 130.
　また、上記実施の形態では、偏心ピン６０１ａは、溝１２１ｅの幅の半分程度の径とされたが、溝１２１ｅの幅と同程度の径であってもよい。また、溝１２１ｅは直線状であったが、円、楕円等の曲線状でもよい。 In the above embodiment, the eccentric pin 601a has a diameter that is about half the width of the groove 121e, but may have a diameter that is about the same as the width of the groove 121e. Moreover, although the groove | channel 121e was linear, curved shape, such as a circle | round | yen and an ellipse, may be sufficient.
　また、上記実施の形態では、レーザ光源１１０の光軸とコリメータレンズ１２０の光軸が互いに一致する位置が、ＸＹ軸方向におけるレーザ光源１１０の所期の設置位置とされたが、レーザ光源１１０の光軸がコリメータレンズ１２０の光軸から所定方向に所定距離だけずれた位置が、ＸＹ軸方向におけるレーザ光源１１０の所期の設置位置とされても良い。 Further, in the above embodiment, the position where the optical axis of the laser light source 110 and the optical axis of the collimator lens 120 coincide with each other is the desired installation position of the laser light source 110 in the XY axis direction. A position where the optical axis is shifted from the optical axis of the collimator lens 120 by a predetermined distance in a predetermined direction may be an intended installation position of the laser light source 110 in the XY axis direction.
　また、上記実施の形態では、段部１１１ｂが４つとされたが、少なくとも３つの段部１１１ｂがハウジング１５０の外側面（前面）に当接すればよく、段部１１１ｂが３つ、または５つ以上形成されても良い。あるいは、段部１１１ｂを形成せずに、レーザホルダ１１１の後面とハウジング１５０の前面を面接触させても良い。ただし、この場合は、レーザホルダ１１１の後面とハウジング１５０の前面の面精度をかなり高める必要がある。 In the above-described embodiment, the number of the step portions 111b is four. However, at least three step portions 111b may be in contact with the outer surface (front surface) of the housing 150, and the number of step portions 111b is three, or five or more. It may be formed. Alternatively, the rear surface of the laser holder 111 and the front surface of the housing 150 may be brought into surface contact without forming the stepped portion 111b. However, in this case, it is necessary to considerably improve the surface accuracy of the rear surface of the laser holder 111 and the front surface of the housing 150.
　また、上記実施の形態では、レンズホルダ１２１の外側面を、全周に亘って略円形にしたが、レンズホルダ１２１の底部のみを円形にする等、傾斜面１５０ｄに当接するレンズホルダの部分のみを円形にしても良い。また、傾斜面１５０ｄに当接するレンズホルダの部分は必ずしも円形でなくても良く、左右方向に対称な曲面形状であっても良い。 Further, in the above embodiment, the outer surface of the lens holder 121 is substantially circular over the entire circumference, but only the portion of the lens holder that contacts the inclined surface 150d, such as circular only the bottom of the lens holder 121, is used. May be circular. In addition, the portion of the lens holder that contacts the inclined surface 150d does not necessarily have to be circular, and may have a curved shape that is symmetrical in the left-right direction.
　また、上記実施の形態では、一対の傾斜面１５０ｄをハウジング１５０に形成したが、二対以上の傾斜面１５０ｄをハウジング１５０に形成してもよく、または、図４（ａ）において、左側の傾斜面の数と右側の傾斜面の数が異なっていても良い。さらに、左側の傾斜面１５０ｄの傾斜角度と右側の傾斜面１５０ｄの傾斜角度が異なっていても良い。傾斜面１５０ｄは、レンズホルダ１２１のＸ軸方向の移動が規制されるように、レンズホルダ１２１を支持できれば、他の構成であっても良い。 In the above embodiment, the pair of inclined surfaces 150d are formed in the housing 150. However, two or more pairs of inclined surfaces 150d may be formed in the housing 150. Alternatively, in FIG. The number of surfaces and the number of right inclined surfaces may be different. Furthermore, the inclination angle of the left inclined surface 150d may be different from the inclination angle of the right inclined surface 150d. The inclined surface 150d may have another configuration as long as it can support the lens holder 121 so that the movement of the lens holder 121 in the X-axis direction is restricted.
　また、上記実施の形態では、図５（ｂ）に示すように、溝１２１ｅがレンズホルダ１２１の真下（最底部）に形成され、孔１５０ｃがハウジング１５０の底部に形成されたが、溝１２１ｅと孔１５０ｃの位置は、これに限定されず、たとえば、ハウジング１５０の左右の側面に孔１５０ｃを形成し、この孔１５０ｃから溝１２１ｅが外部に臨むように、溝１２１ｅをレンズホルダ１２１の左右の側面に形成しても良い。 Further, in the above embodiment, as shown in FIG. 5B, the groove 121e is formed directly below (bottommost part) of the lens holder 121 and the hole 150c is formed at the bottom of the housing 150. The position of the hole 150c is not limited to this. For example, the hole 150c is formed on the left and right side surfaces of the housing 150, and the groove 121e is formed on the left and right side surfaces of the lens holder 121 so that the groove 121e faces the outside from the hole 150c. You may form in.
　また、上記実施の形態では、図５（ｂ）に示すように、孔１５０ｃが円形であったが、正方形や菱形等、孔１５０ｃを他の形状としても良い。孔１５０ｃを正方形とする場合、正方形の一辺は、Ｚ軸調整用治具６０１の径よりもやや大きく設定されると良い。なお、図５の場合も、孔１５０ｃの径は、Ｚ軸調整用治具６０１の径よりもやや大きく設定されると良い。こうすると、孔１５０ｃの内壁によってＺ軸調整用治具６０１の外周が規制されるため、Ｚ軸調整用治具６０１を回転させ易くなる。 In the above embodiment, the hole 150c is circular as shown in FIG. 5 (b), but the hole 150c may have other shapes such as a square or rhombus. When the hole 150c is a square, one side of the square is preferably set slightly larger than the diameter of the Z-axis adjusting jig 601. In the case of FIG. 5 as well, the diameter of the hole 150c is preferably set slightly larger than the diameter of the Z-axis adjusting jig 601. If it carries out like this, since the outer periphery of the Z-axis adjustment jig | tool 601 is controlled by the inner wall of the hole 150c, it will become easy to rotate the Z-axis adjustment jig | tool 601.
　また、上記実施の形態では、受光素子として、ＣＭＯＳイメージセンサ２４０を用いたが、これに替えて、ＣＣＤイメージセンサを用いることもできる。さらに、受光光学系２００の構成も、適宜変更可能である。また、情報取得装置１と情報処理装置２は一体化されても良いし、情報取得装置１と情報処理装置２がテレビやゲーム機、パーソナルコンピュータと一体化されても良い。 In the above embodiment, the CMOS image sensor 240 is used as the light receiving element, but a CCD image sensor can be used instead. Furthermore, the configuration of the light receiving optical system 200 can be changed as appropriate. The information acquisition device 1 and the information processing device 2 may be integrated, or the information acquisition device 1 and the information processing device 2 may be integrated with a television, a game machine, or a personal computer.
　本発明の実施の形態は、特許請求の範囲に示された技術的思想の範囲内において、適宜、種々の変更が可能である。 The embodiment of the present invention can be appropriately modified in various ways within the scope of the technical idea shown in the claims.
　　　　　１　…　情報取得装置
　　　　１０　…　発光装置
　　　１１０　…　レーザ光源
　　　１１１　…　レーザホルダ
　　１１１ｂ　…　段部（突部）
　　　１２０　…　コリメータレンズ
　　　１２１　…　レンズホルダ
　　１２１ｄ　…　凸部（突起）
　　１２１ｅ　…　溝
　　　１４０　…　ＤＯＥ（回折光学素子）
　　　１５０　…　ハウジング
　　１５０ｂ　…　開口
　　１５０ｃ　…　孔
　　１５０ｄ　…　傾斜面
　　　１６０　…　押さえバネ（板ばね） DESCRIPTION OF SYMBOLS 1 ... Information acquisition apparatus 10 ... Light-emitting device 110 ... Laser light source 111 ... Laser holder 111b ... Step part (projection part)
120 ... Collimator lens 121 ... Lens holder 121d ... Convex part (protrusion)
121e: groove 140: DOE (diffractive optical element)
150 ... Housing 150b ... Opening 150c ... Hole 150d ... Inclined surface 160 ... Holding spring (leaf spring)

Claims (9)

  1. 　レーザ光源と、
    　前記レーザ光源から出射されたレーザ光を平行光に変換するコリメータレンズと、
    　前記平行光に変換されたレーザ光が入射する回折光学素子と、
    　前記レーザ光源、前記コリメータレンズおよび前記回折光学素子を収容するハウジングと、
    　前記レーザ光源の出射光軸に垂直な面内方向において前記レーザ光源の位置を調整するための第１の位置調整部と、
    　前記コリメータレンズの光軸に平行な方向において前記コリメータレンズの位置を調整するための第２の位置調整部と、を有する、
    ことを特徴とする発光装置。     A laser light source;
    A collimator lens for converting laser light emitted from the laser light source into parallel light;
    A diffractive optical element on which the laser beam converted into the parallel light is incident;
    A housing for housing the laser light source, the collimator lens and the diffractive optical element;
    A first position adjusting unit for adjusting the position of the laser light source in an in-plane direction perpendicular to the emission optical axis of the laser light source;
    A second position adjustment unit for adjusting the position of the collimator lens in a direction parallel to the optical axis of the collimator lens,
    A light emitting device characterized by that.
  2. 　請求項１に記載の発光装置において、
    　前記第１の位置調整部は；
    　前記レーザ光源を保持するとともに前記出射光軸に垂直な一つの第１基準面を有するレーザホルダと、
    　前記ハウジングに設けられ、前記第１基準面と面接触する第２基準面と、
    　前記第１基準面と前記第２基準面とが接触し、且つ、前記レーザホルダが調整位置に位置付けられた状態で、前記レーザホルダと前記ハウジングとを接着固定する接着剤とを備える、
    ことを特徴とする発光装置。     The light-emitting device according to claim 1.
    The first position adjustment unit;
    A laser holder that holds the laser light source and has a first reference surface perpendicular to the emission optical axis;
    A second reference surface provided in the housing and in surface contact with the first reference surface;
    An adhesive for bonding and fixing the laser holder and the housing in a state where the first reference surface and the second reference surface are in contact with each other and the laser holder is positioned at an adjustment position;
    A light emitting device characterized by that.
  3. 　請求項２に記載の発光装置において、
    　前記第２基準面は、前記ハウジングの外側面に形成され、
    　前記第１基準面は、前記レーザホルダの側面に形成されるとともに前記ハウジングの前記外側面に接触する３つ以上の突部の上端面に形成され、
    　前記ハウジングには、前記第１基準面を前記第２基準面に接触させたときに前記レーザ光源から出射されたレーザ光を前記ハウジング内に導くための開口が形成されている、
    ことを特徴とする発光装置。     The light-emitting device according to claim 2.
    The second reference surface is formed on an outer surface of the housing;
    The first reference surface is formed on the upper surface of three or more protrusions that are formed on a side surface of the laser holder and are in contact with the outer surface of the housing.
    The housing is formed with an opening for guiding laser light emitted from the laser light source into the housing when the first reference surface is brought into contact with the second reference surface.
    A light emitting device characterized by that.
  4. 　請求項１ないし３の何れか一項に記載の発光装置において、
    　前記第２の位置調整部は；
    　前記コリメータレンズを保持するとともに、下面が前記コリメータレンズの光軸に垂直な左右方向に対称な曲面形状となっているレンズホルダと、
    　前記ハウジングに配され、前記レンズホルダの前記下面が挟まれるように前記レンズホルダが載置される複数の傾斜面と、
    　前記レンズホルダの上部に当接するとともに前記レンズホルダを前記傾斜面に向かう方向に弾性付勢する板ばねと、を有する、
    ことを特徴とする発光装置。     The light emitting device according to any one of claims 1 to 3,
    The second position adjustment unit;
    A lens holder that holds the collimator lens and whose lower surface has a curved shape symmetrical in the left-right direction perpendicular to the optical axis of the collimator lens;
    A plurality of inclined surfaces on which the lens holder is placed so that the lower surface of the lens holder is sandwiched between the housing and the lower surface of the lens holder;
    A leaf spring that abuts the upper portion of the lens holder and elastically biases the lens holder in a direction toward the inclined surface.
    A light emitting device characterized by that.
  5. 　請求項４に記載の発光装置において、
    　前記第２の位置調整部は、さらに；
    　前記レンズホルダの側面に形成され、前記コリメータレンズの光軸に垂直な方向に延びる溝と、
    　前記ハウジングに形成され、前記溝を外部に臨ませる孔と、を有する、
    ことを特徴とする発光装置。     The light-emitting device according to claim 4.
    The second position adjustment unit further includes:
    A groove formed on a side surface of the lens holder and extending in a direction perpendicular to the optical axis of the collimator lens;
    A hole formed in the housing and facing the groove to the outside,
    A light emitting device characterized by that.
  6. 　請求項４または５に記載の発光装置において、
    　前記レンズホルダの外側面に、前記コリメータレンズの光軸方向に延びる一定高さの突起が形成され、前記板ばねは前記突起に当接して前記レンズホルダを前記傾斜面に向かう方向に付勢する、
    ことを特徴とする発光装置。     The light-emitting device according to claim 4 or 5,
    A protrusion having a constant height extending in the optical axis direction of the collimator lens is formed on the outer surface of the lens holder, and the leaf spring abuts on the protrusion to urge the lens holder in a direction toward the inclined surface. ,
    A light emitting device characterized by that.
  7. 　請求項６に記載の発光装置において、
    　前記板ばねは、前記突起を頂点として長手方向に均等に撓むように、前記ハウジングに装着される、
    ことを特徴とする発光装置。     The light-emitting device according to claim 6.
    The leaf spring is attached to the housing so as to bend evenly in the longitudinal direction with the protrusion as a vertex.
    A light emitting device characterized by that.
  8. 　光を用いて目標領域の情報を取得する情報取得装置において、
    　請求項１ないし７の何れか一項に記載の発光装置と、
    　前記目標領域から反射された反射光を受光する受光装置と、
    を備えたことを特徴とする情報取得装置。     In an information acquisition device that acquires information on a target area using light,
    A light emitting device according to any one of claims 1 to 7,
    A light receiving device that receives reflected light reflected from the target area;
    An information acquisition device comprising:
  9. 　請求項８に記載の情報取得装置を有する物体検出装置。 An object detection apparatus having the information acquisition apparatus according to claim 8.
PCT/JP2011/075386 2011-03-16 2011-11-04 Light-emitting device, information acquisition device, and object detection device mounted therewith WO2012124208A1 (en)

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