WO2014073152A1 - 光源ユニット、光源装置、及び画像表示装置 - Google Patents
光源ユニット、光源装置、及び画像表示装置 Download PDFInfo
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- WO2014073152A1 WO2014073152A1 PCT/JP2013/005868 JP2013005868W WO2014073152A1 WO 2014073152 A1 WO2014073152 A1 WO 2014073152A1 JP 2013005868 W JP2013005868 W JP 2013005868W WO 2014073152 A1 WO2014073152 A1 WO 2014073152A1
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- Prior art keywords
- light
- light source
- axis direction
- optical axis
- solid
- Prior art date
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2013—Plural light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/61—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using light guides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/142—Adjusting of projection optics
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2066—Reflectors in illumination beam
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
Definitions
- the present technology relates to a light source unit, a light source device, and an image display device using these.
- a fixed light source such as an LED has a long life and does not require replacement of a conventional lamp, and has an advantage that it is turned on immediately after the power is turned on.
- a solid light source is directly used as a light source.
- a light emitter such as a phosphor that emits light when excited by excitation light is used as a light source.
- the solid light source is used as an excitation light source that emits excitation light.
- the blue light emitted from the first and second solid-state light source groups is condensed by the condensing optical system and irradiated to the fluorescence generation unit.
- the fluorescence generation unit generates fluorescence including red light and green light using blue light as excitation light.
- white light including blue light, red light, and green light is emitted from the fluorescence generation unit (see, for example, FIGS. 1 and 2 of Patent Document 1).
- the first and second solid-state light source groups are arranged so that the optical axis directions are different from each other.
- the blue light emitted from each solid-state light source group is incident on the condensing optical system with the light traveling directions aligned by the first and second reflecting portions. Blue light is irradiated from the condensing optical system to the fluorescence generation unit along the incident direction, and white light is emitted from the fluorescence generation unit.
- the optical system described in Patent Document 1 has a complicated structure. For this reason, it is difficult to cool the solid light source and handle blue light.
- an object of the present technology is to provide a light source unit, a light source device, and an image display device that facilitate cooling of a light source and handling of light.
- a light source unit includes one or more solid light sources and a condensing optical system.
- the one or more solid-state light sources include a light emitter that emits visible light having a longer wavelength range than light in the predetermined wavelength range when excited by light in a predetermined wavelength range with a predetermined direction as an optical axis direction.
- light including visible light from the illuminant are arranged on the rear side of the emitting part capable of emitting light along the optical axis direction, and light in the predetermined wavelength region is aligned along the same direction as the optical axis direction.
- the condensing optical system condenses the light in the predetermined wavelength range emitted from the one or more solid light sources on the light emitter from the rear side of the emitting portion.
- one or more solid light sources are arranged on the rear side of the emitting part capable of emitting light including light in a predetermined wavelength range and visible light from the light emitter. And the light of a predetermined wavelength range is radiate
- the light is condensed on the light emitting body of the emitting portion by a condensing optical system. Thereby, the space for cooling one or more solid light sources can be ensured easily.
- the optical axis direction of the emitting portion and the optical axis direction of the one or more solid light sources are the same, it becomes easy to handle light in a predetermined wavelength region.
- the condensing optical system may include an aspheric reflecting surface that reflects and collects light from the one or more solid-state light sources.
- an aspheric reflecting surface for condensing light to the light emitter, the light source device can be made compact.
- the size of the condensing optical system can be suppressed even when the number of solid-state light sources is increased to increase the luminance. As a result, it is possible to achieve high brightness while suppressing an increase in size of the apparatus. Further, by using an aspherical reflecting surface, it becomes possible to easily realize a structure corresponding to necessary luminance and shape.
- the condensing optical system may include a reflecting member that reflects light from the one or more solid-state light sources reflected by the aspheric reflecting surface to the light emitter.
- a reflecting member that reflects light from the one or more solid-state light sources reflected by the aspheric reflecting surface to the light emitter.
- the reflection member may have any one of a plane reflection surface, a concave reflection surface, and a convex reflection surface as a reflection surface that reflects light from the one or more solid light sources.
- the condensing optical system may include a condensing lens that condenses light from the one or more solid-state light sources.
- the light from one or more solid light sources may be condensed by the condenser lens.
- the condensing optical system may include a light guiding optical system including one or more plane reflecting surfaces that guide light from the one or more solid light sources to the condensing lens.
- a light guide optical system By using such a light guide optical system, the optical axis direction of the emitting portion and the optical axis direction of one or more solid light sources may be set in the same direction.
- the light source unit may further include an arrangement surface that is a surface perpendicular to the optical axis direction and on which the one or more solid light sources are disposed. Thereby, the space on the rear side of the arrangement surface can be easily secured as a space for cooling one or more solid light sources. By disposing a cooling member or the like in this space, one or more solid light sources can be cooled from the rear side.
- the arrangement surface may have a polygonal shape when viewed from the optical axis direction.
- a light source unit can be constructed according to the required brightness and shape.
- the arrangement surface may have a triangular shape when viewed from the optical axis direction.
- a light source unit can be constructed according to the required brightness and shape.
- the light source unit may further include a support unit that supports the one or more solid light sources and the condensing optical system as one unit. Since it is supported as a single unit by the support portion, it is easy to arrange a plurality of light source units. In addition, light source units having various configurations can be appropriately combined and arranged.
- a light source device includes an emission unit and one or more light source units.
- the emitting portion includes a light emitter that emits visible light having a longer wavelength range than the light having the predetermined wavelength range by being excited by light having a predetermined wavelength range with the predetermined direction as an optical axis direction. Light including visible light from the light emitter can be emitted along the optical axis direction.
- the one or more light source units include one or more solid light sources and a condensing optical system.
- the one or more solid-state light sources are arranged on the rear side of the emitting unit and emit light in the predetermined wavelength region along the same direction as the optical axis direction.
- the condensing optical system condenses the light in the predetermined wavelength range emitted from the one or more solid light sources on the light emitter from the rear side of the emitting portion.
- the one or more light source units may be a plurality of light source units arranged symmetrically with respect to the optical axis of the light emitted from the emission unit. As a result, high luminance can be achieved.
- An image display device includes a light source device, an image generation system, and a projection system.
- the light source device includes an emitting unit and one or more light source units.
- the emitting portion includes a light emitter that emits visible light having a longer wavelength range than the light having the predetermined wavelength range by being excited by light having a predetermined wavelength range with the predetermined direction as an optical axis direction. Light including visible light from the light emitter can be emitted along the optical axis direction.
- the one or more light source units include one or more solid light sources and a condensing optical system. The one or more solid-state light sources are arranged on the rear side of the emitting unit and emit light in the predetermined wavelength region along the same direction as the optical axis direction.
- the condensing optical system condenses the light in the predetermined wavelength range emitted from the one or more solid light sources on the light emitter from the rear side of the emitting portion.
- the image generation system includes an image generation element and an illumination optical system.
- the image generation element generates an image based on the irradiated light.
- the illumination optical system irradiates the image generating element with light emitted from the light source device.
- the projection system projects an image generated by the image generating element.
- FIG. 1 It is a figure which shows the structural example of a plane reflection part. It is a figure which shows the shaft support hole formed in the lower support part of a support frame. It is a perspective view which shows the axial part inserted in a shaft support hole. It is a figure which shows the state by which the insertion part of the axial part was inserted in the through-hole of the axial support hole. It is sectional drawing which shows the state by which the insertion part was inserted. It is a figure which shows the structure of the condensing unit mentioned as a specific Example. It is a figure which shows the structure of the condensing unit in the Example. It is a figure which shows the number and arrangement position of the several laser light source in the Example.
- FIG. 1 It is a figure which shows the structural example at the time of arranging two condensing units shown in FIG. It is a figure showing the composition of the condensing unit concerning a 5th embodiment of this art. It is a figure showing the composition of the condensing unit concerning a 6th embodiment of this art. It is a schematic diagram which shows the other structural example by which multiple condensing units are arrange
- FIG. 1 is a perspective view illustrating a configuration example of a light source device 100 according to the first embodiment of the present technology.
- the light source device 100 is for a projector of a type that emits white light by combining light in a blue wavelength region and light in a red wavelength region that is generated from a fluorescent material excited by the laser light and in a green wavelength region. It is a light source device.
- the light source device 100 has a base 1 provided at the bottom and a side wall 2 fixed to the base 1.
- the light source device 100 also includes a front surface portion 3 and an upper surface portion 4 connected to the side wall portion 2, and a lid portion 5 connected to the upper surface portion 4.
- the side wall portion 2, the front surface portion 3, the upper surface portion 4 and the lid portion 5 constitute a housing portion 10 of the light source device 100.
- the base 1 has an elongated shape extending in one direction.
- the long and elongated longitudinal direction of the base 1 is the left and right direction of the light source device 100
- the short direction perpendicular to the longitudinal direction is the front and rear direction. Accordingly, one of the two long portions facing each other in the short direction is the front side 6 and the other is the rear side 7. Further, the direction perpendicular to both the longitudinal direction and the short direction is the height direction of the light source device 100.
- the x-axis, y-axis, and z-axis directions are the left-right direction, the front-rear direction, and the height direction, respectively.
- FIG. 1B is a diagram in which illustration of the front surface portion 3, the upper surface portion 4, and the lid portion 5 is omitted, and is a diagram illustrating an internal configuration example of the light source device 100.
- the side wall 2 has a notch 9 formed in the center of the front side 6 and an opening 11 formed in the rear side 7.
- a phosphor unit 20 is disposed in a notch 9 on the front side 6 of the side wall 2.
- the phosphor unit 20 is fixed to the base 1 through the notch 9 so that the emission surface 21 faces the front side. Therefore, the optical axis A of the light emitted from the phosphor unit 20 extends along the y-axis direction through the approximate center of the base 1. That is, in this embodiment, the y-axis direction corresponds to a predetermined direction, and the direction is set to the optical axis direction.
- each condensing unit 30 has a plurality of laser light sources 31 capable of emitting blue laser light B1.
- two light source portions 32 having a plurality of laser light sources 31 are arranged in the longitudinal direction in the opening 11 on the rear side 7 of the side wall portion 2.
- a plurality of laser light sources 31 are arranged such that the blue laser light B1 is emitted along the same direction as the optical axis direction of the optical axis A.
- Each condensing unit 30 condenses the blue laser light B ⁇ b> 1 from the plurality of laser light sources 31 toward the phosphor unit 20.
- the upper surface portion 4 is disposed above the two light collecting units 30.
- the upper surface part 4 is connected to the side wall part 2 and the two light collecting units 30.
- the front surface portion 3 is disposed above the phosphor unit 20 and connected to the phosphor unit 20, the upper surface portion 4, and the base 1.
- the lid 5 is disposed so as to cover an intermediate portion between the two light collecting units 30 and is connected to the upper surface 4.
- the method for fixing and connecting the members is not limited.
- the members are engaged with each other through a predetermined engaging portion, and the members are fixed and connected by screwing or the like.
- FIG. 2 is a plan view of the light source device 100 shown in FIG. 2, illustration of the support part 33 which supports the condensing unit 30 as one unit is abbreviate
- FIG. 3 is a schematic configuration diagram for explaining light emission by the light source device 100.
- the condensing unit 30 includes a light source unit 32 including a plurality of laser light sources 31, a condensing optical system that condenses the blue laser light B ⁇ b> 1 that is emitted from the plurality of laser light sources 31 at a predetermined point 8, and a light source unit 32 (one or more solid-state light sources) and a support portion 33 that supports the condensing optical system 34 as one unit.
- the plurality of laser light sources 31 are, for example, blue laser light sources capable of oscillating blue laser light B1 having a peak wavelength of emission intensity within a wavelength range of 400 nm to 500 nm.
- the plurality of laser light sources 31 are disposed on the rear side of the phosphor unit 20 and correspond to one or more solid light sources that emit light in a predetermined wavelength region along the same direction as the optical axis direction. Other light sources such as LEDs may be used as the solid light source. Further, the light in the predetermined wavelength region is not limited to the blue laser light B1.
- the condensing optical system 34 condenses the blue laser light B1 emitted from the plurality of laser light sources 31 on the phosphor 22 from the rear side of the phosphor unit 20.
- the condensing optical system 34 of the present embodiment includes an aspheric reflecting surface 35 and a planar reflecting portion 36.
- the aspheric reflecting surface 35 reflects and collects the light emitted from the plurality of laser light sources 31.
- the plane reflecting section 36 reflects the light from the plurality of laser light sources 31 reflected by the aspheric reflecting surface 35 to the phosphor 22.
- the flat reflecting portion 36 has a flat reflecting surface 37 as a reflecting surface for reflecting light from the plurality of laser light sources 31, and reflects light to the phosphor 22 using the flat reflecting surface 37.
- the blue laser light B1 from the plurality of laser light sources 31 is collected at a predetermined point 8 on the phosphor 22 included in the phosphor unit 20.
- the above-described support part 33 supports the light source part 32, the aspherical reflection surface 35, and the planar reflection part 36 as one unit.
- the condensing unit 30 corresponds to a light source unit in the present embodiment. The condensing unit 30 will be described in detail later.
- the phosphor wheel 23 shown in FIG. 3 is provided inside the phosphor unit 20.
- the phosphor wheel 23 includes a disk-shaped substrate 24 that transmits the blue laser light B ⁇ b> 1, and a phosphor layer 22 provided on the arrangement surface 28 of the substrate 24.
- a motor 25 for driving the phosphor wheel 23 is connected to the center of the substrate 24, and the phosphor wheel 23 has a rotation axis 26 at a normal line passing through the center of the substrate 24, and can rotate around the rotation axis 26. Is provided.
- the rotating shaft 26 of the phosphor wheel 23 is provided so that the extending direction thereof is the same direction as the optical axis A passing through the approximate center of the phosphor unit 20. Further, the rotation axis 26 is arranged at a position different from the optical axis A so that the predetermined point 8 of the phosphor layer 22 is located substantially at the center (on the optical axis A) of the phosphor unit 20. As shown in FIG. 2, the condensing unit 30 condenses the blue laser light B ⁇ b> 1 at a predetermined point 8 disposed substantially at the center of the phosphor unit 20.
- the phosphor wheel 23 is arranged so that the main surface 27 of the two main surfaces of the substrate 24 on which the phosphor layer 22 is not provided faces the light collecting unit 30 side. ing. Further, the phosphor wheel 23 is arranged so that the focal position of the blue laser light B ⁇ b> 1 condensed by the condensing unit 30 coincides with a predetermined point on the phosphor layer 22.
- the phosphor layer 22 corresponds to a light emitter that is excited by light from a plurality of laser light sources 31 and emits visible light having a wavelength longer than the wavelength of the light.
- the phosphor layer 22 includes a fluorescent material that emits fluorescence when excited by the blue laser light B1 having a center wavelength of about 445 nm.
- the phosphor layer 22 converts a part of the blue laser light B1 emitted from the plurality of laser light sources 31 into light in a wavelength region including the red wavelength region to the green wavelength region (that is, yellow light) and emits it.
- the phosphor contained in the phosphor layer 22 for example, a YAG (yttrium, aluminum, garnet) phosphor is used.
- the kind of fluorescent substance, the wavelength range of the excited light, and the wavelength range of the visible light generated by excitation are not limited.
- the phosphor layer 22 can also emit blue laser light B1 emitted from a plurality of laser light sources 31 by absorbing part of the excitation light and transmitting part of the excitation light. Thereby, the light emitted from the phosphor layer 22 becomes white light due to the color mixture of the blue excitation light and the yellow fluorescence.
- the phosphor layer 22 may include filler particles that are, for example, a particulate material having optical transparency.
- the laser light source 31 irradiates the phosphor layer 22 with excitation light while relatively moving the irradiation position on the phosphor layer 22.
- the phosphor unit 20 emits blue laser light B2 that has passed through the phosphor layer 22 and light including green light G2 and red light R2 that are visible light from the phosphor layer 22 as emitted light.
- the phosphor unit 20 corresponds to an emission part in the present embodiment.
- the configuration of the phosphor unit 20 is not limited.
- the phosphor wheel 23 may not be used.
- the phosphor layer 22 may be held by another holding unit, and the blue laser light from the light collecting unit 30 may be collected there.
- FIG. 4 and 5 are perspective views showing a configuration example of the light collecting unit 30.
- FIG. 6 is a plan view of the light collecting unit 30 shown in FIG. 5 as viewed from above.
- the light collecting unit 30 includes the light source unit 32, the aspherical reflection surface 35, the plane reflection unit 36, and the support unit 33 that supports these as one unit. If these can be integrally supported as a single unit, the shape and size of the support portion 33 are not limited. Typically, a support portion 33 having a housing shape is used so that the blue laser light B1 does not leak outside. Thereby, the utilization efficiency of the blue laser beam B1 is improved.
- a laser light source array having 28 laser light sources 31 is used as the light source unit 32.
- the light source unit 32 includes a plate-like frame 39 in which an opening 38 is formed, and a mounting substrate 41 on which a plurality of laser light sources 31 are mounted is disposed on the rear surface 40 (surface on the rear side 7) of the frame 39. .
- the plurality of laser light sources 31 emit blue laser light B ⁇ b> 1 along the same direction as the optical axis direction of the optical axis A toward the front side 6 through the opening 38 of the frame 39.
- Four laser light sources 31 are arranged in the left-right direction (x-axis direction) of the light source device 100 and seven in the height direction (z-axis direction).
- collimator lenses 43 are arranged on the front surface 42 (front surface 6 surface) of the frame 39 in accordance with the positions of the plurality of laser light sources 31.
- the collimator lens 43 is a rotationally symmetric aspherical lens, and makes the blue laser light B1 emitted from each laser light source 31 into a substantially parallel light beam.
- a lens unit 44 in which four collimator lenses 43 arranged in a straight line are integrally formed is used. Seven lens units 44 are arranged along the height direction. The lens unit 44 is held by a fixing member 45 fixed to the frame 39.
- the collimator lens 43 may be described as the laser light source 31 in some cases.
- the configuration of the light source unit 32 is not limited, and the frame 39 may not be used, for example.
- the number and arrangement of the laser light sources 31 and the configuration of the collimator lens 43 are not limited.
- the lens unit 44 may not be used, and a collimator lens may be disposed for each laser light source 31.
- the light beams from the plurality of laser light sources 31 may be combined into a substantially parallel light beam by a single collimator lens. In the drawing, a part of the light beam of the blue laser light B1 emitted from the plurality of laser light sources 31 (collimator lenses 43) is shown.
- a reflecting member 48 having an aspheric reflecting surface 35 is disposed on the front side 6 of the plurality of laser light sources 31.
- the reflecting member 48 is disposed so that the aspheric reflecting surface 35 faces the plurality of laser light sources 31.
- the aspherical reflecting surface 35 is a surface perpendicular to the optical axis direction and is disposed obliquely with respect to the planar direction (xz surface direction) of the disposition surface 42 on which the plurality of laser light sources 31 are disposed.
- the blue laser beam B1 is reflected toward the planar reflecting portion 36.
- the reflecting member 48 for example, a reflecting mirror is used.
- the aspherical reflecting surface 35 is typically a mirror-like concave reflecting surface, and the shape is designed so that the blue laser light B1 from the plurality of laser light sources 31 can be reflected and condensed.
- the material of the reflecting member 48 is not limited, and for example, a metal material or glass is used.
- FIG. 7 and 8 are schematic views showing an example of the reflecting member 48.
- the aspherical reflecting surface 35 included in the reflecting member 48 may be a rotationally symmetric aspherical surface, or may be a free curved surface that does not have a rotationally symmetric axis.
- the shape of the aspherical reflecting surface 35 is determined based on the positions of the plurality of laser light sources 31, the light reflecting direction and the condensing position, the size and incident angle of the laser beam B1 incident on the aspherical reflecting surface 35, and the like. Is appropriately set.
- FIG. 8 is a view of the reflecting member 48 as viewed from the back surface 50 side opposite to the aspheric reflecting surface 35.
- FIG. 8 is a cross-sectional view of the reflecting members 48 in a direction substantially orthogonal to each other.
- the reflecting member 48 has a substantially rectangular outer shape when viewed from the back surface 50 side (hereinafter, the outer shape viewed from the back surface 50 side is simply referred to as an outer shape).
- the reflecting member 48 has a cross-sectional shape along the shape of the aspheric reflecting surface 35.
- the outer shape of the reflecting member 48 can be changed as appropriate in accordance with the size of the irradiation region of the blue laser light B1 that is made into a substantially parallel light beam by the collimator lens 43.
- a substantially rectangular reflecting member 48 as shown in FIG. 8 may be used, or a triangular or other polygonal reflecting member 48 may be used.
- the outer shape of the reflecting member 48 can be appropriately adjusted and reduced as compared with the case where a condensing lens is used to condense light from the plurality of laser light sources 31.
- the blue laser beam B1 is irradiated over the entire aspherical reflecting surface 35 of the reflecting member 48 shown in FIG.
- a lens having a size that includes at least the outer shape of the reflecting member 48 is required.
- the thickness of the reflecting member 48 can also be made smaller than when a condensing lens is used.
- the condensing optical system 34 can be made compact, and the enlargement of the light source device 100 can be suppressed. It is also clear from the optical system of the telescope that a reflecting surface having a parabolic shape is generally suitable for a small condensing optical system rather than a refractive system using a lens.
- the reflecting member 48 is supported by a supporting member 49.
- the support member 49 is fixed to the support portion 33 by screwing. Thereby, the reflecting member 48 is supported by the support portion 33.
- FIG. 9 is an enlarged view of the planar reflection portion 36 supported by the support portion 33.
- FIG. 10 is a diagram illustrating a configuration example of the planar reflection unit 36.
- the planar reflecting portion 36 includes a planar reflecting member 52 having a planar reflecting surface 37.
- the plane reflecting surface 37 reflects the blue laser light B 1 reflected by the aspheric reflecting surface 35 to a predetermined point 8 on the phosphor layer 22.
- the planar reflecting surface 37 is typically a mirror surface.
- a reflecting mirror is used as the planar reflecting member 52.
- the material of the planar reflecting member 52 is not limited, and for example, a metal material or glass is used.
- the planar reflecting portion 36 also has a member holding portion 54 that holds the planar reflecting member 52, a support frame 55 that supports the lower portion of the member holding portion 54 so as to be rotatable and tiltable, and a member holding portion on the upper side of the member holding portion 54. And a connecting portion 56 that connects the portion 54 and the support frame 55.
- the member holding portion 54, the support frame 55, and the connecting portion 56 constitute an adjustment mechanism 57 that adjusts the position and angle of the planar reflecting surface 37.
- the member holding portion 54 is plate-shaped, and a recess 58 is formed in almost the entire area of one surface.
- a plate-like planar reflecting member 52 is fitted into the recess 58.
- the member holding part 54 is erected along the height direction (z-axis direction).
- the normal direction of the surface on which the concave portion 58 is formed, that is, the normal direction of the plane reflecting surface 37 is a direction orthogonal to the z-axis.
- the shaft portion 60 extending in the z-axis direction is formed at the end of the member holding portion 54.
- the shaft portion 60 is formed integrally with the member holding portion 54.
- the member holding portion 54 also rotates. Accordingly, the planar reflecting member 52 held by the member holding portion 54 also moves integrally with the shaft portion 60. That is, the member holding part 54 holds the flat reflecting surface 37 integrally with the shaft part 60.
- the shaft portion 60 is formed so as to be arranged linearly above and below the member holding portion 54.
- a mounting portion 61 described later is formed above and below the member holding portion 54, and a shaft portion 60 is formed on the mounting portion 61.
- the attachment parts 61 and the shaft parts 60 that are formed vertically have the same shape.
- One of the two shaft portions 60 is inserted into a shaft support hole 63 formed in the support frame 55.
- the other shaft portion 60 is used as an operation portion 64 that is operated when adjusting the angle of the plane reflecting surface 37.
- the connecting portion 56 is attached to the attaching portion 61 on the operation portion 64 side.
- the shaft portion 60 to be inserted into the shaft support hole 63 is appropriately selected based on the arrangement position of the planar reflecting surface 37, the design of the light collecting unit 30, and the like.
- the shaft part 60 having the same shape is formed on the upper and lower parts thereof. That is, the shaft portion 60 and the operation portion 64 may be formed in the same shape without distinction, and the manufacturing cost of the member holding portion 54 can be reduced. In addition, since the shaft portion 60 inserted into the shaft support hole 63 can be selected, the degree of freedom regarding the attachment of the member holding portion 54 can be improved.
- the support frame 55 includes a lower support portion 65, an upper support portion 66, and a connection frame 67 that connects them.
- the lower support portion 65 and the upper support portion 66 are disposed so as to face each other at positions substantially equal to the lower portion and the upper portion of the member holding portion 54 in the z-axis direction.
- the connection frame 67 extends along the z-axis direction and connects the lower support portion 65 and the upper support portion 66.
- a shaft support hole 63 for supporting the shaft portion 60 of the member holding portion 54 is formed in the lower support portion 65. By inserting the shaft portion 60 into the shaft support hole 63, the member holding portion 54 is supported to be rotatable and tiltable.
- the shapes of the shaft support hole 63 and the shaft portion 60 will be described in detail.
- FIG. 11 is a view showing the shaft support hole 63 formed in the lower support portion 65 of the support frame 55.
- 11A is a perspective view of the lower support portion 65
- FIG. 11B is a plan view of the shaft support hole 63 as viewed from above.
- the shaft support hole 63 is formed at the end of the lower support portion 65 in the x-axis direction.
- the shaft support hole 63 includes a recess 68 (ball seat) formed in a substantially spherical shape and an oval through hole 69 formed in the bottom of the recess 68.
- the recess 68 is formed in a substantially hemispherical shape.
- the oval through-hole 69 is formed so that its long axis l coincides with the y-axis direction that is the front-rear direction of the light source device 100.
- the short axis s coincides with the x-axis direction that is the left-right direction of the light source device 100.
- FIG. 12 is a perspective view showing the shaft portion 60 inserted into the shaft support hole 63.
- the shaft portion 60 includes an insertion portion 70 having a circular cross-sectional shape and a spherical portion 71 formed on the upper portion of the insertion portion 70.
- the diameter of the cross section of the insertion portion 70 is substantially equal to the size of the short axis s of the through hole 69 of the shaft support hole 63.
- the spherical portion 71 has a substantially hemispherical shape corresponding to the concave portion 68 of the shaft support hole 63.
- the insertion portion 70 is rotatably inserted into the through hole 69. At that time, the spherical portion 71 is movably supported by the recess 68 of the shaft support hole 63.
- FIG. 13 is a diagram showing a state where the insertion portion 70 of the shaft portion 60 is inserted into the through hole 69 of the shaft support hole 63.
- FIG. 13 is a view of this state as seen from below the lower support portion 65.
- FIG. 14 is a cross-sectional view showing a state where the insertion portion 70 is inserted.
- 14A is a cross-sectional view taken along the line AA in FIG. 13, and
- FIG. 14B is a cross-sectional view taken along the line BB.
- the circular portion in the through hole 69 is the insertion portion 70.
- the portion visible in the gap between the insertion portion 70 and the through hole 69 is a spherical portion 71 of the shaft portion 60 placed in the recess 68. That is, the gap 72 in FIG. 13 corresponds to the gap 72 in FIG.
- the shaft support hole 63 having the spherical recess 68 and the oval through hole 69 is formed in the lower support portion 65.
- An insertion portion 70 to be inserted into the through hole 69 and a spherical portion 71 supported by the recess 68 are formed in the shaft portion 60. Accordingly, the lower support portion 65 can support the shaft portion 60 so as to be rotatable and tiltable.
- a rotational drive system having the shaft portion 60 (axis B) as a rotational axis and a rotational drive system having a rotational axis as the axis C based on the shaft support hole 63 (tilting)
- a two-axis drive mechanism of the drive system is realized. This makes it possible to adjust the angle of the planar reflecting surface 37 in the rotation direction and tilting direction of the shaft portion 60.
- the tilt direction is the y-axis direction, which is the direction of the long axis l of the through hole 69, but the tilt direction along the connecting portion 56 described below is a rotation direction with the axis C as the rotation axis.
- a shaft support hole 63 is also formed at the other end of the lower support portion 65.
- a plurality of shaft support holes 63 may be formed, and the shaft support hole 63 into which the shaft portion 60 is inserted may be appropriately selected based on the arrangement position of the planar reflection surface 37 and the like. Thereby, the freedom degree of design of the condensing unit 30 can be improved.
- the length of the long axis 1 of the through hole 59 may be set according to the angle at which the shaft portion 60 is tilted. Increasing the length of the long axis l increases the tiltable angle. If the length of the long axis l is small, the tiltable angle becomes small.
- the long axis 1 is set to coincide with the y-axis direction. This makes it possible to tilt the shaft portion 60 in the y-axis direction.
- the tilting direction is the y-axis direction
- the direction of the long axis 1 may be set as appropriate. Thereby, the tiltable direction can be set as appropriate.
- the configuration for supporting the shaft portion 60 so as to be rotatable and tiltable is not limited to the above-described configuration, and any configuration may be adopted.
- the material of the support frame 55 having the lower support portion 65 and the member holding portion 54 having the shaft portion 60 is not limited, and for example, metal, plastic, or the like may be used as appropriate.
- the support frame 55 is supported by a frame support portion 74.
- the frame support portion 74 is included in the support portion 33 that supports the planar reflection portion 36 and the like as one unit.
- the support frame 55 is supported so as to be movable with respect to the frame support portion 74 in the front-rear direction (y-axis direction) of the light source device 100.
- the member holding portion 54 and the support frame 55 move integrally. Thereby, the position of the plane reflecting surface 37 is adjusted.
- the configuration of the moving mechanism for making the support frame 55 movable is not limited.
- guide portions or the like for guiding the support frame 55 are formed above and below the frame support portion 74.
- the moving mechanism may be configured by appropriately using a spring member or the like that exhibits an elastic force in the moving direction.
- any configuration may be adopted.
- a linear drive mechanism having the axis D as the drive axis is realized by the moving mechanism.
- the connecting portion 56 will be described with reference to FIGS. As described above, the connecting portion 56 is attached to the attaching portion 61 formed on the upper portion of the member holding portion 54.
- An operation portion 64 shaft portion 60
- a protrusion 75 is formed at a position adjacent to the operation portion 64.
- the connecting portion 56 is a member having an L shape in which one end of a rectangular plate member is bent by approximately 90 degrees.
- the connecting portion 56 has a flat surface portion 76 and a tip portion 77 bent about 90 degrees with respect to the flat surface portion 76.
- the connecting portion 56 is disposed such that the flat portion 76 is positioned on the attachment portion 61 and the upper support portion 66 of the support frame 55. Further, the connecting portion 56 is arranged so that the distal end portion 77 is located on the front surface 78 side of the mounting portion 61.
- An opening 80 is formed in the approximate center of the flat portion 76 along the longitudinal direction of the flat portion 76.
- a protrusion 75 formed on the attachment portion 61 is inserted into the opening 80 so as to be movable in the opening 80.
- An opening 81 is also formed along the longitudinal direction at the end of the flat surface 76 opposite to the tip 77.
- a screw 83 is attached to the opening 81 via a washer 82.
- the connecting portion 56 and the upper support portion 66 of the support frame 55 are connected via the screw 83.
- the adjustment of the position and angle of the plane reflecting surface 37 is performed with the screw 83 temporarily fixed.
- the angle of the plane reflecting surface 37 with the shaft unit 60 as the center is adjusted.
- the position of the condensing point 8 in the left-right direction can be adjusted.
- the tilt of the planar reflecting surface 37 can be adjusted by moving the operation portion 64 in the front-rear direction and tilting the shaft portion 60.
- the position of the condensing point 8 in the height direction can be adjusted.
- the focus position of the condensing point 8 can be adjusted by adjusting the position of the support frame 55 in the front-rear direction.
- the connecting part 56 moves with these adjustments. For example, the relative position of the protrusion 75 with respect to the opening 80 formed in the flat portion 76 changes. Further, the relative position of the screw 83 with respect to the opening 81 changes (see the movement of the connecting portion 56 in FIG. 9). Further, the connecting portion 56 also moves in the rotational direction around the screw 83. The amount of movement varies depending on the adjustment method.
- a fixing member 84 is provided so as to sandwich the distal end portion 77 of the connecting portion 56 and the back surface of the attachment portion 61.
- the member holding part 54 is fixed at a predetermined position and angle.
- the plane reflecting surface 37 is fixed at a predetermined position and angle.
- the method for fixing the member holding portion 54 is not limited.
- FIG. 15 and 16 are diagrams showing a configuration of the light collecting unit 130 according to the present embodiment.
- FIG. 16 is a view of the condensing unit 130 viewed obliquely from the back side of the plurality of laser light sources 131.
- the light beams from the plurality of laser light sources 131 are made into substantially parallel light beams by the collimator lens 143 provided in each laser light source 131.
- the blue laser beam B1 that has been converted into a substantially parallel light beam travels along the same direction as the optical axis direction of the optical axis A, and is reflected and collected by the aspherical reflecting surface 135 of the reflecting member 148.
- the blue laser light B 1 reflected by the aspherical reflecting surface 135 is reflected by the planar reflecting surface 137 and is collected at a predetermined condensing point 108 on the phosphor layer 122.
- FIG. 17 is a diagram showing the number and arrangement positions of a plurality of laser light sources 131.
- the xyz coordinates shown in FIG. 17 are coordinates corresponding to the xyz coordinates shown in FIG.
- the plurality of laser light sources 131 a total of 28 laser light source arrays arranged in a row along the x-axis direction and 7 along the y-axis direction are used.
- the number of laser light sources 131 is not limited.
- the distance between the laser light sources 131 in the x-axis direction and the y-axis direction is 11 mm.
- the diameter of the laser beam B1 of the substantially parallel light beam emitted from the collimator lens 143 is 6 mm. Accordingly, the blue laser light B1 having a substantially parallel light beam is irradiated toward the aspherical reflecting surface 135 within a range of 39 mm in the x-axis direction and 72 mm in the y-axis direction.
- FIG. 18 and FIG. 19 are tables showing each data related to the condensing unit 130.
- the first optical system in the table is an optical system that makes the light beams of the blue laser light B1 emitted from the plurality of laser light sources 131 substantially parallel (reference numeral 111 in FIG. 15). Therefore, an optical system including a plurality of collimator lenses 143 corresponds to the first optical system 111.
- the second optical system is an optical system for condensing the blue laser light B1 from the plurality of laser light sources 131 made into a substantially parallel light beam by the first optical system 111 at a predetermined point 108 (FIG. 15). 112). Accordingly, the optical system including the aspherical reflecting surface 135 and the planar reflecting surface 137 corresponds to the second optical system 112.
- the object side NA in the table is the numerical aperture of the collimator lens 143 for the blue laser light B1 from each laser light source 131.
- the focal length f1 of the first optical system 111 is the focal length of the collimator lens 143 (unit: mm).
- the focal length f2 of the second optical system 112 is the focal length of the optical system including the aspherical reflecting surface 135 and the planar reflecting surface 137 (unit: mm). However, since the focal length of the planar reflecting surface 137 is infinite, the focal length f2 is the focal length of the aspheric reflecting surface 135.
- the first optical surface of the first optical system 111 corresponds to the array start surface, and corresponds to the emission surfaces of the 28 laser light sources 131.
- the surface S1 is a light source side surface of the cover glass 105 that covers the laser light source 131 (see FIG. 15).
- the surface S2 is the surface on the opposite side of the cover glass 105, that is, the surface on the side from which the laser beam B1 is emitted.
- the surface S3 is a plane of the collimator lens 143 on the laser light source 131 side.
- the surface S4 is an aspheric surface of the collimator lens 143, and this surface is the final array surface.
- the surfaces up to the surface S4 are surfaces included in the first optical system 111.
- the surface S5 is the aspheric reflecting surface 135 of the reflecting member 148.
- the surface S6 is the planar reflection surface 137 of the planar reflection member 152.
- the surface S6 is set as an eccentric surface that is eccentric with respect to the xy plane formed by the x-axis and the y-axis in FIG.
- the surface S7 is a surface 127 opposite to the arrangement surface 128 on which the phosphor layer 122 is disposed.
- the second light source surface of the second optical system 112 is the surface of the phosphor layer 122 on the side on which the blue laser light B1 is incident.
- the radius of curvature (mm) of each surface, the distance (mm) between the surfaces, and the refractive index n for blue laser light having a wavelength of 445 nm are described.
- the radius of curvature and the interval are described with positive and negative signs with reference to the z axis shown in FIG. Note that the curvature radius being infinite means that the surface is a plane.
- the refractive index n is described for a substrate having a cover glass 105, a collimator lens 143, and an arrangement surface 128.
- FIG. 19 shows aspherical data of the surfaces S4 and S5 and eccentricity setting data of the surfaces S6 and S7.
- an aspheric surface is represented by the following expression.
- c is a curvature
- K is a conic constant
- Ai is a correction coefficient.
- the surface S4 which is an aspherical surface of the collimator lens 143 is represented by substituting the conic constant K and the correction coefficient Ai shown in FIG. Further, the curvature c is obtained from the curvature radius of FIG. S5 which is an aspherical reflecting surface is a paraboloid having a conic constant K of -1.
- the surface S6 which is an eccentric surface is eccentric by 40 ° in the clockwise direction about the y axis with respect to the xy plane shown in FIG.
- the surface S7 is not rotated and is arranged in parallel with the xy plane, and is shifted by 14.97 mm in the x-axis direction.
- the condensing unit 130 is realized by supporting the plurality of laser light sources 131, the aspherical reflecting surface 135, and the planar reflecting surface 137 shown in this embodiment as one unit by the support unit. Can do. It should be noted that the specific shapes and numerical values of the respective parts exemplified in this embodiment are merely examples of the implementation performed when the present technology is implemented, and the technical scope of the present technology is limited by these. is not.
- FIG. 20 is a diagram illustrating a configuration example when two light collecting units 130 illustrated in FIG. 15 are arranged. This corresponds to the configuration shown in FIG.
- the two light collecting units 130 are respectively arranged at two positions where the axis A passing through the phosphor layer 122 is symmetric.
- the axis A corresponds to the optical axis of the light emitted from the phosphor unit 120.
- the number of laser light sources 131 is doubled to 56, and the brightness of white light emitted from the phosphor layer 122 can be increased.
- each condensing point 108 may be set at a different position on the phosphor layer 122. Thereby, deterioration of the phosphor layer 122 can be suppressed.
- two condensing points 108 are set at positions where the distances from the rotation axis of the phosphor wheel are different from each other. Thereby, when the phosphor wheel rotates, the blue laser light B1 is condensed on two circumferences around the rotation axis. Thereby, it is possible to prevent phosphor saturation and combustion. This idea can also be applied when the number of light collecting units is increased.
- the phosphor unit 120 shown in FIG. 20 has an emission optical system 180 that can change the luminous flux of the white light W emitted from the phosphor layer 122 into a substantially parallel luminous flux and has a variable focal length.
- the emission optical system 180 is an optical system for taking the luminous flux emitted from the phosphor layer 122 into the illumination system 1500 (see FIG. 29). As shown in FIG. 20, the axis A passing through the phosphor layer 122 becomes the optical axis of the light collecting unit 130. Light is emitted from the phosphor layer 122 with approximately Lambertian, and the emitted light beam is converted into a substantially parallel beam by the output optical system 180 and then emitted to the illumination system 1500.
- the focal length of the output optical system 180 is variable.
- a focus mechanism that moves the emission optical system 180 in the optical axis direction is provided.
- the luminous flux emitted from the light source can be efficiently taken into the illumination system 1500 without deterioration.
- the two optical lenses 181 and 182 constitute an emission optical system 180.
- the configurations of the emission optical system 180 and the focus mechanism are not limited.
- the plurality of laser light sources 31 are arranged on the rear side of the phosphor unit 20 capable of emitting light including the blue laser light B1 and visible light from the phosphor 22. Then, the blue laser light B ⁇ b> 1 is emitted from the plurality of laser light sources 31 in the same direction as the optical axis direction of the phosphor unit 20. The emitted blue laser light B ⁇ b> 1 is condensed on the phosphor 22 of the phosphor unit 20 by the condensing optical system 34. Thereby, a space for cooling the plurality of laser light sources 31 can be easily secured.
- the space 90 on the rear side of the two light source sections 32 that is, the space 90 on the rear side of the arrangement surface 42 on which the plurality of laser light sources 31 are arranged, is easily secured as a space for cooling. It becomes possible to do.
- a cooling member 95 such as a heat sink or a cooling fan in the space 90, the plurality of laser light sources 31 can be cooled from the rear side 7.
- the space 90 on the rear side 7 is opposite to the position of the illumination system 1500 that receives the white light W from the phosphor unit 20. Therefore, the cooling member 95 having an appropriate structure for sufficiently cooling the light source unit 32 can be disposed without being restricted by the structure and arrangement of the illumination system 1500. As a result, the light source unit 32 can be efficiently cooled. Further, since the arrangement surfaces 42 of the two light source units 32 are arranged side by side in the left-right direction, it is possible to easily cool the two light source units 32 together using one cooling member 95. Of course, a plurality of cooling members may be used.
- the blue laser light B1 can be easily handled. For example, when assembling the light source device 100 or adjusting each member, it is easy to grasp the traveling direction of the blue laser light B1. Therefore, it is possible to easily implement safety measures such as preventing unexpected laser light irradiation. Further, by combining the emission direction of the white light W and the emission direction of the blue laser light B1, it becomes easy to take a light shielding measure against light leakage.
- the aspherical reflecting surface 35 is used for condensing the phosphor 22.
- the light source device 100 can be made compact.
- the size of the condensing optical system 34 can be suppressed even when the number of laser light sources 31 is increased to increase the luminance.
- the aspherical reflecting surface 35 it is possible to easily realize a structure corresponding to necessary luminance and shape.
- the planar reflecting member 52 that reflects the blue laser light B1 reflected by the aspheric reflecting surface 35 toward the phosphor 22 is used.
- the degree of freedom regarding the design of the condensing optical system 34 can be increased.
- the light source device 100 can be miniaturized and a desired shape can be realized. Therefore, a configuration in which the optical axis direction of the white light W and the emission direction of the blue laser light B1 from the plurality of laser light sources 31 are the same can be easily realized.
- the support unit 33 supports the plurality of laser light sources 31 and the condensing optical system 34 as one unit. Therefore, it becomes easy to arrange a plurality of unitized light collecting units 30. That is, it becomes possible to deal with multi-units. Since the shape and the like of the light collecting unit 30 can be flexibly changed, it is possible to appropriately combine the light collecting units 30 having various configurations to meet various specifications.
- FIG. 22 is a diagram illustrating a configuration of the light collecting unit 230 according to the present embodiment.
- a total of eight laser light source arrays in which three are arranged in the x-axis and y-axis directions and the centers are vacant are used as the plurality of laser light sources 231.
- a reflecting member 248 having an aspheric reflecting surface 235 is disposed at a position where the plurality of laser light sources 231 face each other.
- the reflecting member 248 is disposed at a position relatively close to the plurality of laser light sources 231 so as to cover the plurality of laser light sources 231.
- a reflecting member 252 having a concave reflecting surface 237 is disposed at a vacant position at the approximate center of the eight laser light sources 231.
- the reflecting member 252 is disposed so that the concave reflecting surface 237 faces the aspheric reflecting surface 235.
- An opening (not shown) is formed substantially at the center of the aspheric reflecting surface 235, and a predetermined condensing point 208 on the phosphor layer 222 is set on the other side of the opening (opposite side of the aspheric reflecting surface 235). Has been.
- Blue laser light B1 having a substantially parallel luminous flux is emitted along the normal direction (z-axis direction) of the surface on which the plurality of laser light sources 231 are arranged, that is, in the same direction as the optical axis direction of the optical axis A of the phosphor unit. .
- the blue laser beam B1 is reflected toward the reflecting member 252 by the aspheric reflecting surface 235. Then, the blue laser beam B1 is reflected by the concave reflecting surface 237, and is condensed at the condensing point 208 through the opening.
- the reflecting member 252 having the concave reflecting surface 237 may be used as a reflecting surface that reflects the blue laser light B1 reflected by the aspheric reflecting surface 235 toward the phosphor 222.
- a reflecting surface having a desired shape it is possible to reduce the size of the light source device, realize a desired shape, or the like.
- FIG. 23 is a diagram illustrating a configuration of the light collecting unit 330 according to the third embodiment of the present technology.
- the light collecting unit 330 according to the present embodiment has substantially the same configuration as the light collecting unit 230 of the second embodiment.
- the main difference from the condensing unit 230 is the number of the plurality of laser light sources 331 and the position of the reflecting member 352.
- the plurality of laser light sources 331 a total of twelve laser light source arrays arranged in the x-axis direction and three in the y-axis direction are used.
- the reflecting member 352 is disposed at a position substantially at the center of the twelve laser light sources 331 and closer to the aspheric reflecting surface 335 than the plurality of laser light sources 331.
- Blue laser light B1 having a substantially parallel luminous flux is emitted along the normal direction (z-axis direction) of the surface on which the plurality of laser light sources 331 are arranged, that is, in the same direction as the optical axis direction of the optical axis A of the phosphor unit. .
- the blue laser beam B1 is reflected toward the reflecting member 352 by the aspheric reflecting surface 335. Then, the blue laser beam B1 is reflected by the concave reflecting surface 337 and is condensed at the condensing point 308 through an opening (not shown).
- Such a configuration may be adopted.
- FIG. 24 is a diagram illustrating a configuration of a light collecting unit 430 according to the fourth embodiment of the present technology. Also in the light collecting unit 430 according to the present embodiment, the reflecting member 452 having the concave reflecting surface 437 is used. As shown in FIG. 24, in this embodiment, a condensing point 408 on the phosphor layer 422 is set at a position relatively distant from the positions of the plurality of laser light sources 431 and the aspherical reflecting surface 435 in the x-axis direction. Yes. In order to collect the blue laser beam B1 at the condensing point 408, the reflecting member 452 is also arranged at a position away from the aspheric reflecting surface 435 and the like. As the plurality of laser light sources 431, 28 laser light source arrays are used. Such a configuration may be adopted.
- FIG. 25 is a diagram showing a configuration example in the case of using two condensing units 430 shown in FIG. As shown in FIG. 25, the condensing unit 430 is arranged with the optical axis A of the light emitted from the phosphor unit 420 symmetrical. As a result, the number of laser light sources 431 can be increased, and the brightness of the emitted white light can be increased.
- an optimal configuration for arranging the plurality of condensing optical systems 434 can be realized by appropriately setting the position of the reflecting member 452 and the like.
- the two concave reflecting surfaces 437A and 437B shown in FIG. 25 are both spherical.
- the concave reflecting surface 426 made of one spherical surface may be used in place of the two concave reflecting surfaces 437A and 437B.
- each condensing optical system 434 can be easily performed.
- an adjustment mechanism capable of appropriately adjusting the position, the arrangement angle, and the like of each of the plurality of concave reflection surfaces 437 may be used. Thereby, a plurality of condensing optical systems can be easily arranged.
- the configuration of the adjustment mechanism is not limited.
- a holding mechanism that holds the reflecting member, a guide mechanism that rotates or moves the holding mechanism, and the like may be used as appropriate.
- the reflecting member may be adjusted and fixed to an appropriate position by the adjusting mechanism.
- movement of a light source device using an actuator etc. may be employ
- FIG. 26 is a diagram illustrating a configuration of a light collecting unit 530 according to the fifth embodiment of the present technology.
- a total of 10 laser light source arrays are used as the plurality of laser light sources 531, which are arranged in the x-axis direction, arranged in the y-axis direction, and vacant in the center.
- a reflecting member 548 having an aspheric reflecting surface 535 is disposed at a position where the plurality of laser light sources 531 are opposed to each other.
- the reflection member 548 is disposed at a position relatively close to the plurality of laser light sources 531 so as to cover the plurality of laser light sources 531.
- a reflecting member 552 having a convex reflecting surface 537 is disposed at a vacant position at the approximate center of the ten laser light sources 531.
- the reflection member 552 is disposed at a position closer to the aspheric reflection surface 535 than the plurality of laser light sources 531.
- the reflection member 552 is disposed such that the convex reflection surface 537 faces the aspheric reflection surface 535.
- An opening (not shown) is formed substantially at the center of the aspheric reflecting surface 535, and a predetermined condensing point 508 on the phosphor layer 522 is set on the other side of the opening (opposite side of the aspheric reflecting surface 535). Has been.
- Blue laser light B1 having a substantially parallel luminous flux is emitted along the normal direction (z-axis direction) of the surface on which the plurality of laser light sources 531 are arranged, that is, in the same direction as the optical axis direction of the optical axis A of the phosphor unit. .
- the blue laser beam B1 is reflected toward the reflecting member 552 by the aspheric reflecting surface 535. Then, the blue laser beam B1 is reflected by the convex reflecting surface 537, and is condensed at the condensing point 508 through the opening.
- the reflection member 552 having the convex reflection surface 537 may be used as a reflection surface for reflecting the blue laser light B1 reflected by the aspheric reflection surface 535 toward the phosphor 522.
- a reflecting surface having a desired shape it is possible to reduce the size of the light source device, realize a desired shape, or the like.
- FIG. 27 is a diagram illustrating a configuration of a light collecting unit 630 according to the sixth embodiment of the present technology.
- the light collecting unit 630 according to the present embodiment has substantially the same configuration as the light collecting unit 530 according to the fifth embodiment.
- the main difference from the condensing unit 530 is the number of the plurality of laser light sources 631.
- the plurality of laser light sources 631 a total of eight laser light source arrays in which three are arranged in the x-axis and y-axis directions and the centers are vacant are used. As shown in FIG. 27, the reflecting member 652 is disposed at a substantially central position of the eight laser light sources 631.
- Blue laser light B1 having a substantially parallel luminous flux is emitted along the normal direction (z-axis direction) of the surface on which the plurality of laser light sources 631 are arranged, that is, in the same direction as the optical axis direction of the optical axis A of the phosphor unit. .
- the blue laser beam B1 is reflected toward the reflecting member 652 by the aspheric reflecting surface 635. Then, the blue laser beam B1 is reflected by the convex reflecting surface 637 and is condensed at the condensing point 608 through the opening.
- Such a configuration may be adopted.
- FIG. 28 is a schematic diagram showing another configuration example in which a plurality of light collecting units are arranged.
- four light collecting units 730 (830) may be arranged with the optical axis A symmetrical.
- each condensing unit 730 (830) adjustment is appropriately performed so that the light is condensed at the condensing point on the optical axis A.
- the number of the light collecting units to be arranged is not limited, and more light collecting units may be arranged.
- the planar shape of the arrangement surface is a planar shape viewed from the emission direction of the emitted light from the plurality of laser light sources.
- the planar shape of the plate-like frame 39 corresponds to the planar shape of the arrangement surface.
- the outer shape of the light collecting unit 730 viewed from the emission direction is also formed in a rectangular shape in accordance with the shape of the arrangement surface.
- the outer shape of the light collecting unit 830 can also be formed in a triangular shape. Since an aspheric reflecting surface is used as the condensing optical system, the number of light sources and the degree of freedom of arrangement are high. This is because the shape, size, etc. of the aspherical reflecting surface can be appropriately designed according to the light flux from the light source. As a result, a light source in which a plurality of light sources are arranged on a triangular arrangement surface as shown in FIG. 28B can be used. And the condensing unit whose external shape seen from the optical axis direction is triangular shape is realizable.
- the shape of the light collecting unit can be set freely in this way, it is easy to make the shape of the light collecting unit suitable for a multi-unit, and a plurality of light collecting units are arranged in a limited space. Is also possible. As a result, the light source device can be reduced in size.
- the planar shape of the arrangement surface is not limited to a rectangle or a triangle, but may be a polygon or a circle. What is necessary is just to set the shape of an arrangement
- positioning surface suitably according to the shape of a required condensing unit.
- FIG. 29 is a schematic diagram showing a configuration example of the projector.
- the projector 2000 includes a light source device 1000 according to the present technology (for example, the light source device described in the above embodiments), an illumination system 1500, and a projection system 1700.
- the illumination system 1500 includes an image generation element 1510 that generates an image based on the irradiated light, and an illumination optical system 1520 that irradiates the image generation element 1510 with light emitted from the light source device 1000.
- the projection system 1700 projects the image generated by the image generation element 1510.
- the illumination system 1500 includes an integrator element 1530, a polarization conversion element 1540, and a condenser lens 1550.
- Integrator element 1530 has a first fly-eye lens 1531 having a plurality of microlenses arranged two-dimensionally, and a second having a plurality of microlenses arranged to correspond to each of the microlenses.
- the fly eye lens 1532 is included.
- the parallel light incident on the integrator element 1530 from the light source device 1000 is divided into a plurality of light beams by the microlens of the first fly-eye lens 1531 and imaged on the corresponding microlens in the second fly-eye lens 1532.
- Each of the micro lenses of the second fly-eye lens 1532 functions as a secondary light source, and irradiates the polarization conversion element 1540 with incident light as a plurality of parallel lights with uniform brightness.
- the integrator element 1530 as a whole has a function of adjusting incident light irradiated from the light source device 1000 to the polarization conversion element 1540 into a uniform luminance distribution.
- the polarization conversion element 1540 has a function of aligning the polarization state of incident light incident through the integrator element 1530 and the like.
- the polarization conversion element 1540 emits outgoing light including blue laser light B3, green light G3, and red light R3 via, for example, a condenser lens 1550 disposed on the outgoing side of the light source device 1000.
- the illumination optical system 1520 includes dichroic mirrors 1560 and 1570, mirrors 1580, 1590 and 1600, relay lenses 1610 and 1620, field lenses 1630R, 1630G and 1630B, liquid crystal light valves 1510R, 1510G and 1510B as image generation elements, and a dichroic prism 1640. Is included.
- the dichroic mirrors 1560 and 1570 have a property of selectively reflecting color light in a predetermined wavelength range and transmitting light in other wavelength ranges. Referring to FIG. 29, for example, dichroic mirror 1560 selectively reflects red light R3. The dichroic mirror 1570 selectively reflects the green light G3 out of the green light G3 and the blue light B3 transmitted through the dichroic mirror 1560. The remaining blue light B3 passes through the dichroic mirror 1570. Thereby, the light emitted from the light source device 1000 is separated into a plurality of color lights of different colors.
- the separated red light R3 is reflected by the mirror 1580, collimated by passing through the field lens 1630R, and then enters the liquid crystal light valve 1510R for modulating red light.
- the green light G3 is collimated by passing through the field lens 1630G, and then enters the liquid crystal light valve 1510G for green light modulation.
- the blue light B3 passes through the relay lens 1610 and is reflected by the mirror 1590, and further passes through the relay lens 1620 and is reflected by the mirror 1600.
- the blue light B3 reflected by the mirror 1600 is collimated by passing through the field lens 1630B, and then enters the liquid crystal light valve 1510B for modulating blue light.
- the liquid crystal light valves 1510R, 1510G, and 1510B are electrically connected to a signal source (not shown) (such as a PC) that supplies an image signal including image information.
- the liquid crystal light valves 1510R, 1510G, and 1510B modulate incident light for each pixel based on the supplied image signals of each color, and generate a red image, a green image, and a blue image, respectively.
- the modulated light of each color (formed image) enters the dichroic prism 1640 and is synthesized.
- the dichroic prism 1640 superimposes and synthesizes light of each color incident from three directions and emits the light toward the projection system 1700.
- Projection system 1700 has a plurality of lenses 1710 and the like, and irradiates a screen (not shown) with light synthesized by dichroic prism 1640. Thereby, a full-color image is displayed.
- the projector 2000 can be reduced in size by including the light source device 1000 according to the present technology.
- the shape and the like of the light source device 1000 it is possible to improve the design of the outer shape of the projector 2000 and the like.
- a condensing optical system 934 having a condensing lens 950 that condenses light B1 from a plurality of laser light sources 931 may be used.
- a light guide optical system 965 including one or more plane reflecting surfaces 960 that guides the light B1 from the plurality of laser light sources 931 to the condenser lens 950 may be used. If the optical axis direction of the optical axis A of the phosphor unit and the optical axis direction of the plurality of laser light sources 931 are set in the same direction, a configuration using the condenser lens 950 and the like as described above can also be adopted. is there. Further, as long as both emission directions are set in the same direction, the type of the condenser lens 950 and the configuration of the light guide optical system 965 are not limited.
- an illumination system 1500 configured using a transmissive liquid crystal panel is described.
- a digital micromirror device (DMD) or the like may be used as the image generation element.
- DMD digital micromirror device
- a polarization beam splitter (PBS) instead of the dichroic prism 1640, a polarization beam splitter (PBS), a color synthesis prism that synthesizes RGB video signals, a TIR (Total Internal Reflection) prism, or the like may be used.
- PBS polarization beam splitter
- TIR Total Internal Reflection
- an apparatus other than the projector may be configured as the image display apparatus according to the present technology.
- the light source device according to the present technology may be used for a device that is not an image display device.
- this technique can also take the following structures.
- a light emitter that emits visible light in a longer wavelength region than the light in the predetermined wavelength region by being excited by light in the predetermined wavelength region with the predetermined direction as the optical axis direction, and the light in the predetermined wavelength region and the light emission 1 or more that is arranged on the rear side of the emitting part capable of emitting light including visible light from the body along the optical axis direction, and emits light in the predetermined wavelength region along the same direction as the optical axis direction
- a solid state light source A light source unit comprising: a condensing optical system that condenses the light in the predetermined wavelength range emitted from the one or more solid-state light sources on the light emitter from the rear side of the emission unit.
- the condensing optical system has a non-spherical reflecting surface that reflects and collects light from the one or more solid-state light sources.
- the light source unit according to (2), The said condensing optical system has a reflection member which reflects the light from the said 1 or more solid light source reflected by the said aspherical reflective surface to the said light-emitting body.
- the reflection member has any one of a plane reflection surface, a concave reflection surface, and a convex reflection surface as a reflection surface that reflects light from the one or more solid-state light sources.
- the light source unit according to (1), The said condensing optical system has a condensing lens which condenses the light from the said 1 or more solid light source.
- the condensing optical system includes a light guiding optical system including one or more plane reflecting surfaces that guide light from the one or more solid light sources to the condensing lens.
- the light source unit according to (7), The arrangement surface is a light source unit having a polygonal planar shape when viewed from the optical axis direction.
- the light source unit according to (7) or (8), The arrangement surface is a light source unit in which a planar shape viewed from the optical axis direction is a triangular shape.
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Abstract
Description
前記1以上の固体光源は、所定の方向を光軸方向として所定波長域の光により励起されて前記所定波長域の光よりも長波長域の可視光を発する発光体を有し前記所定波長域の光と前記発光体からの可視光とを含む光を前記光軸方向に沿って出射可能な出射部の後方側に配置され、前記所定波長域の光を前記光軸方向と同じ方向に沿って出射する。
前記集光光学系は、前記1以上の固体光源から出射された前記所定波長域の光を前記出射部の後方側から前記発光体上に集光する。
発光体への集光に非球面反射面が用いられることで、光源装置のコンパクト化を図ることができる。例えば高輝度化のために固体光源の数が増加する場合でも、集光光学系の大きさを抑えることができる。この結果、装置の大型化を抑えつつ高輝度化を達成することが可能となる。また非球面反射面が用いられることで、必要な輝度や形状に応じた構造を容易に実現することも可能となる。
このような反射部材を設けることで、集光光学系の設計に関する自由度を増加させることができる。この結果、光源装置の小型化や所望の形状の実現等を図ることができる。
所望の形状の反射面を適宜選択することで、光源装置の小型化や所望の形状の実現等を図ることができる。
このように1以上の固体光源からの光が集光レンズにより集光されてもよい。
このような導光光学系を用いることで、出射部の光軸方向と1以上の固体光源の光軸方向とが同じ方向に設定されてもよい。
これにより配置面の後方側のスペースを、1以上の固体光源を冷却するためのスペースとして容易に確保することができる。このスペースに冷却部材等を配置することで、後方側から1以上の固体光源を冷却することができる。
これにより必要な輝度や形状に応じて光源ユニットを構築することができる。
これにより必要な輝度や形状に応じて光源ユニットを構築することができる。
支持部により1つのユニットとして支持されるので、その光源ユニットを複数配置することが容易となる。また種々の構成を有する光源ユニットを適宜組み合わせて配置することも可能となる。
前記出射部は、所定の方向を光軸方向として所定波長域の光により励起されて前記所定波長域の光よりも長波長域の可視光を発する発光体を有し前記所定波長域の光と前記発光体からの可視光とを含む光を前記光軸方向に沿って出射可能である。
前記1以上の光源ユニットは、1以上の固体光源と、集光光学系とを有する。
前記1以上の固体光源は、前記出射部の後方側に配置され前記所定波長域の光を前記光軸方向と同じ方向に沿って出射する。
前記集光光学系は、前記1以上の固体光源から出射された前記所定波長域の光を前記出射部の後方側から前記発光体上に集光する。
これにより高輝度化を図ることができる。
前記光源装置は、出射部と、1以上の光源ユニットとを有する。
前記出射部は、所定の方向を光軸方向として所定波長域の光により励起されて前記所定波長域の光よりも長波長域の可視光を発する発光体を有し前記所定波長域の光と前記発光体からの可視光とを含む光を前記光軸方向に沿って出射可能である。
前記1以上の光源ユニットは、1以上の固体光源と、集光光学系とを有する。
前記1以上の固体光源は、前記出射部の後方側に配置され前記所定波長域の光を前記光軸方向と同じ方向に沿って出射する。
前記集光光学系は、前記1以上の固体光源から出射された前記所定波長域の光を前記出射部の後方側から前記発光体上に集光する。
前記画像生成システムは、画像生成素子と、照明光学系とを有する。
前記画像生成素子は、照射された光をもとに画像を生成する。
前記照明光学系は、前記画像生成素子に前記光源装置からの出射光を照射する
前記投射システムは、前記画像生成素子により生成された画像を投射する。
<第1の実施形態>
図1は、本技術の第1の実施形態に係る光源装置100の構成例を示す斜視図である。この光源装置100は、青色波長域のレーザ光、及び、そのレーザ光によって励起される蛍光物質から生じる赤色波長域から緑色波長域の光を合成して白色光を出射するタイプの、プロジェクタ用の光源装置である。
本技術に係る第2の実施形態の光源装置について説明する。これ以降の説明では、上記の実施形態で説明した光源装置100における構成及び作用と同様な部分については、その説明を省略又は簡略化する。
図23は、本技術に係る第3の実施形態の集光ユニット330の構成を示す図である。本実施形態に係る集光ユニット330は、第2の実施形態の集光ユニット230と略同様の構成となっている。集光ユニット230との主な差異は、複数のレーザ光源331の数、及び反射部材352の位置である。
図24は、本技術に係る第4の実施形態の集光ユニット430の構成を示す図である。本実施形態に係る集光ユニット430でも、凹面反射面437を有する反射部材452が用いられる。図24に示すように、本実施形態では、複数のレーザ光源431及び非球面反射面435の位置からx軸方向で比較的遠い位置に、蛍光体層422上の集光ポイント408が設定されている。この集光ポイント408に青色レーザ光B1を集光させるために、反射部材452も非球面反射面435等から離れた位置に配置されている。なお複数のレーザ光源431としては、28個のレーザ光源アレイが用いられている。このような構成が採用されてもよい。
図26は、本技術に係る第5の実施形態の集光ユニット530の構成を示す図である。本実施形態では、複数のレーザ光源531として、x軸方向に4つ並び、y軸方向に3つ並び、中心の2つ分が空いている合計10個のレーザ光源アレイが用いられる。図26に示すように、この複数のレーザ光源531の対向する位置に非球面反射面535を有する反射部材548が配置される。反射部材548は、複数のレーザ光源531に比較的近い位置に、複数のレーザ光源531を覆うようにして配置される。
図27は、本技術に係る第6の実施形態の集光ユニット630の構成を示す図である。本実施形態に係る集光ユニット630は、第5の実施形態の集光ユニット530と略同様の構成となっている。集光ユニット530との主な差異は、複数のレーザ光源631の数である。
本実施形態に係る画像表示装置について説明する。ここでは、上記の実施形態で説明した光源装置を搭載可能なプロジェクタを例に挙げて説明する。図29は、そのプロジェクタの構成例を示す模式的な図である。
本技術は、以上説明した実施形態に限定されず、他の種々の実施形態を実現することができる。
(1)所定の方向を光軸方向として所定波長域の光により励起されて前記所定波長域の光よりも長波長域の可視光を発する発光体を有し前記所定波長域の光と前記発光体からの可視光とを含む光を前記光軸方向に沿って出射可能な出射部の後方側に配置され、前記所定波長域の光を前記光軸方向と同じ方向に沿って出射する1以上の固体光源と、
前記1以上の固体光源から出射された前記所定波長域の光を前記出射部の後方側から前記発光体上に集光する集光光学系と
を具備する光源ユニット。
(2)(1)に記載の光源ユニットであって、
前記集光光学系は、前記1以上の固体光源からの光を反射して集光する非球面反射面を有する
光源ユニット。
(3)(2)に記載の光源ユニットであって、
前記集光光学系は、前記非球面反射面により反射された前記1以上の固体光源からの光を前記発光体へ反射する反射部材を有する
光源ユニット。
(4)(3)に記載の光源ユニットであって、
前記反射部材は、前記1以上の固体光源からの光を反射する反射面として、平面反射面、凹面反射面、及び凸面反射面のうちいずれか1つを有する
光学ユニット。
(5)(1)に記載の光源ユニットであって、
前記集光光学系は、前記1以上の固体光源からの光を集光する集光レンズを有する
光源ユニット。
(6)(5)に記載の光源ユニットであって、
前記集光光学系は、前記1以上の固体光源からの光を前記集光レンズへ導く、1以上の平面反射面を含む導光光学系を有する
光源ユニット。
(7)(1)から(6)のうちいずれか1つに記載の光源ユニットであって、さらに、
前記光軸方向に垂直な面であり前記1以上の固体光源が配置される配置面を
具備する光源ユニット。
(8)(7)に記載の光源ユニットであって、
前記配置面は、前記光軸方向から見た平面形状が多角形状である
光源ユニット。
(9)(7)又は(8)に記載の光源ユニットであって、
前記配置面は、前記光軸方向から見た平面形状が三角形状である
光源ユニット。
(10)(1)から(9)のうちいずれか1つに記載の光源ユニットであって、さらに、
前記1以上の固体光源、及び前記集光光学系を1つのユニットとして支持する支持部を
具備する光源ユニット。
B1…青色レーザ光
G2…緑色光
R2…赤色光
W…白色光
20、120…蛍光体ユニット
22、122、222、422、522…蛍光体層
30、130、230、330、430、530、630、730、830…集光ユニット
31、131、231、331、431、531、631、931…レーザ光源
33…支持部
34、434、934…集光光学系
35、135、235、335、435、535、635…非球面反射面
37、137…平面反射面
42…配置面
52、152…平面反射部材
100、1000…光源装置
237、337、437…凹面反射面
252、352、452、552、652…反射部材
537、637…凸面反射面
950…集光レンズ
960…平面反射面
965…導光光学系
1500…照明システム
1510…画像生成素子
1520…照明光学系
1700…投射システム
2000…プロジェクタ
Claims (13)
- 所定の方向を光軸方向として所定波長域の光により励起されて前記所定波長域の光よりも長波長域の可視光を発する発光体を有し前記所定波長域の光と前記発光体からの可視光とを含む光を前記光軸方向に沿って出射可能な出射部の後方側に配置され、前記所定波長域の光を前記光軸方向と同じ方向に沿って出射する1以上の固体光源と、
前記1以上の固体光源から出射された前記所定波長域の光を前記出射部の後方側から前記発光体上に集光する集光光学系と
を具備する光源ユニット。 - 請求項1に記載の光源ユニットであって、
前記集光光学系は、前記1以上の固体光源からの光を反射して集光する非球面反射面を有する
光源ユニット。 - 請求項2に記載の光源ユニットであって、
前記集光光学系は、前記非球面反射面により反射された前記1以上の固体光源からの光を前記発光体へ反射する反射部材を有する
光源ユニット。 - 請求項3に記載の光源ユニットであって、
前記反射部材は、前記1以上の固体光源からの光を反射する反射面として、平面反射面、凹面反射面、及び凸面反射面のうちいずれか1つを有する
光学ユニット。 - 請求項1に記載の光源ユニットであって、
前記集光光学系は、前記1以上の固体光源からの光を集光する集光レンズを有する
光源ユニット。 - 請求項5に記載の光源ユニットであって、
前記集光光学系は、前記1以上の固体光源からの光を前記集光レンズへ導く、1以上の平面反射面を含む導光光学系を有する
光源ユニット。 - 請求項1に記載の光源ユニットであって、さらに、
前記光軸方向に垂直な面であり前記1以上の固体光源が配置される配置面を
具備する光源ユニット。 - 請求項7に記載の光源ユニットであって、
前記配置面は、前記光軸方向から見た平面形状が多角形状である
光源ユニット。 - 請求項7に記載の光源ユニットであって、
前記配置面は、前記光軸方向から見た平面形状が三角形状である
光源ユニット。 - 請求項1に記載の光源ユニットであって、さらに、
前記1以上の固体光源、及び前記集光光学系を1つのユニットとして支持する支持部を
具備する光源ユニット。 - 所定の方向を光軸方向として所定波長域の光により励起されて前記所定波長域の光よりも長波長域の可視光を発する発光体を有し前記所定波長域の光と前記発光体からの可視光とを含む光を前記光軸方向に沿って出射可能な出射部と、
前記出射部の後方側に配置され前記所定波長域の光を前記光軸方向と同じ方向に沿って出射する1以上の固体光源と、
前記1以上の固体光源から出射された前記所定波長域の光を前記出射部の後方側から前記発光体上に集光する集光光学系と
を有する1以上の光源ユニットと
を具備する光源装置。 - 請求項11に記載の光源装置であって、
前記1以上の光源ユニットは、前記出射部から出射される光の光軸を対称にして配置される複数の光源ユニットである
光源装置。 - (a)所定の方向を光軸方向として所定波長域の光により励起されて前記所定波長域の光よりも長波長域の可視光を発する発光体を有し前記所定波長域の光と前記発光体からの可視光とを含む光を前記光軸方向に沿って出射可能な出射部と、
前記出射部の後方側に配置され前記所定波長域の光を前記光軸方向と同じ方向に沿って出射する1以上の固体光源と、
前記1以上の固体光源から出射された前記所定波長域の光を前記出射部の後方側から前記発光体上に集光する集光光学系と
を有する1以上の光源ユニットと
を有する光源装置と、
(b)照射された光をもとに画像を生成する画像生成素子と、前記画像生成素子に前記光源装置からの出射光を照射する照明光学系とを有する画像生成システムと、
(c)前記画像生成素子により生成された画像を投射する投射システムと
を具備する画像表示装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/429,485 US9625800B2 (en) | 2012-11-06 | 2013-10-02 | Light source, light source apparatus, and image display apparatus to facilitate cooling and handling of the light source |
JP2014545553A JP6295960B2 (ja) | 2012-11-06 | 2013-10-02 | 光源ユニット、光源装置、及び画像表示装置 |
EP13852837.7A EP2919068B1 (en) | 2012-11-06 | 2013-10-02 | Light source unit, light source device, and image display device |
CN201380056294.3A CN104756008B (zh) | 2012-11-06 | 2013-10-02 | 光源单元、光源装置和图像显示装置 |
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EP (1) | EP2919068B1 (ja) |
JP (1) | JP6295960B2 (ja) |
CN (1) | CN104756008B (ja) |
WO (1) | WO2014073152A1 (ja) |
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JP2016218303A (ja) * | 2015-05-22 | 2016-12-22 | セイコーエプソン株式会社 | 照明装置およびプロジェクター |
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JPWO2015190032A1 (ja) * | 2014-06-11 | 2017-04-20 | ソニー株式会社 | 画像表示装置、及び画像生成方法 |
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Also Published As
Publication number | Publication date |
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CN104756008A (zh) | 2015-07-01 |
EP2919068A1 (en) | 2015-09-16 |
JPWO2014073152A1 (ja) | 2016-09-08 |
US9625800B2 (en) | 2017-04-18 |
US20150234265A1 (en) | 2015-08-20 |
CN104756008B (zh) | 2017-06-20 |
EP2919068B1 (en) | 2019-01-09 |
EP2919068A4 (en) | 2016-07-06 |
JP6295960B2 (ja) | 2018-03-20 |
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