CN209877943U - Light small-sized multifunctional pulse laser ranging optical system - Google Patents
Light small-sized multifunctional pulse laser ranging optical system Download PDFInfo
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Abstract
The utility model belongs to the technical field of laser, a light small-size multi-functional pulse laser rangefinder optical system is provided, solve the complicated system that makes of current laser rangefinder system structure bulky to and the problem that the range finding scope is little, the function is single. The system comprises a laser emission optical subsystem, a visual aiming optical subsystem, a laser receiving optical subsystem and a projection display optical subsystem; the visual aiming optical subsystem comprises an objective lens group, an image rotating beam splitter prism, a reticle and an eyepiece lens group which are arranged in sequence; the rotating image splitting prism is used for turning the image formed by the objective lens in a way of up-down and left-right reversal to form a positive image; the reticle and the eyepiece group are sequentially arranged in a transmission light path of the relay splitting prism, and the eyepiece group comprises a second cemented lens and a fourth lens which are sequentially coaxially arranged along the light path; the laser receiving optical subsystem and the visual aiming optical subsystem share an objective lens group and a transfer beam splitter prism; the projection display optical subsystem and the visual aiming optical subsystem share a reticle and an eyepiece set.
Description
Technical Field
The utility model belongs to the technical field of laser, concretely relates to multi-functional pulse laser rangefinder optical system.
Background
The laser ranging technology is widely applied to various fields such as engineering construction, safety monitoring, aerospace and the like, and an existing laser ranging optical system, such as the U.S. patent with the publication number of US3464770A, realizes receiving and aiming at a common light path by cutting a folding axis mirror into and out of a light path, but has the problem that ranging receiving and aiming cannot be carried out simultaneously, and moving parts are added in the system due to cutting in and out, so that the structure of the system is complex, and the stability of the system is reduced; meanwhile, the system cannot display the measured data in real time.
In addition, the existing light and small laser ranging system has the ranging range of about 1km, single function, incapability of meeting the requirements of complex occasions, complex structure and larger volume.
SUMMERY OF THE UTILITY MODEL
Make the system bulky in order to solve current laser rangefinder system structure complicacy to and the problem that the range finding scope is little, the function is single, the utility model provides a light small-size multi-functional pulse laser rangefinder optical system.
In order to achieve the above purpose, the utility model provides a technical scheme is:
the utility model provides a light small-size multi-functional pulse laser rangefinder optical system, includes laser emission optics subsystem, visual aiming optics subsystem and laser receiving optics subsystem, its special character lies in: the system also comprises a projection display optical subsystem; the visual aiming optical subsystem comprises an objective lens group, an image rotating beam splitter prism, a reticle and an eyepiece lens group which are sequentially arranged along the direction of a light path; the objective lens group comprises a first cemented lens and a third lens which are coaxially arranged along a light path in sequence; the rotating image splitting prism is used for turning the image formed by the objective lens, which is up, down, left and right reversed, so that the image is formed into a positive image; the reticle and the eyepiece group are sequentially arranged in a transmission light path of the image rotating beam splitter prism; the eyepiece group comprises a second cemented lens and a fourth lens which are coaxially arranged along a light path in sequence;
the laser receiving optical subsystem and the visual aiming optical subsystem share an objective lens group and a transfer beam splitter prism; the laser receiving optical subsystem comprises the objective lens group, an image rotating beam splitter prism, an optical filter and a detector; the optical filter and the detector are sequentially arranged in a reflection light path of the image-rotating beam splitter prism;
the projection display optical subsystem and the visual aiming optical subsystem share a reticle and an eyepiece group, and the projection display optical subsystem comprises an OLED display screen, a projection condenser and a projection reflector which are sequentially arranged along a light path; the optical path of the projection condenser is vertical to the optical path of the visual aiming subsystem, and the projection reflector is positioned between the reticle and the eyepiece group and outside the optical path of the reticle and the eyepiece group; the OLED display screen is used for displaying image information, and the image information comprises cross information and distance information; the projection condenser is used for zooming and imaging the information presented on the OLED display screen to the projection reflector; the projection reflector is used for reflecting the image of the projection information to the reticle.
Furthermore, the image-rotating beam splitting prism is a puro No. 2 prism, the puro No. 2 prism comprises a first right-angle prism, a second right-angle prism and a third right-angle prism, the hypotenuse of the first right-angle prism is glued with the second right-angle prism, and the right-angle side of the first right-angle prism is glued with the third right-angle prism; the light splitting film is plated on the glue partition surface of the first right-angle prism and the second right-angle prism, the reticle and the eyepiece group are sequentially located in a light splitting film transmission light path, and the third right-angle prism, the optical filter and the detector are sequentially located in a light splitting film reflection light path.
Further, the laser emission optical subsystem is a Galileo telescope structure, and the Galileo telescope structure comprises a first lens with negative focal power and a second lens with positive focal power which are sequentially arranged along the direction of the emergent light path.
Furthermore, the first lens and the second lens are both spherical lenses, and antireflection films are plated on the surfaces of the first lens and the second lens.
Further, the third lens is a biconvex lens with positive focal power; the fourth lens is a biconvex lens.
Further, the projection mirror is a positive biconvex lens with focal power.
Furthermore, the optical filter is a narrow-band optical filter, and the detector is a photodiode detector.
Furthermore, the projection condenser and the projection reflector are respectively positioned outside the light path where the reticle and the eyepiece group are positioned.
Further, the distance from the OLED display screen to the optical path of the projection mirror is 68.37 mm; the distance from the first cemented lens to the exit pupil surface of the eyepiece is 91.44 mm; the diameter of the first cemented mirror is 17 mm.
Further, all lenses are spherical lenses.
Compared with the prior art, the utility model has the advantages that:
1. the optical system of the utility model is provided with a projection display optical subsystem, which is used for zooming and imaging the information presented on the OLED display screen onto a reticle in the optical path of the visual aiming subsystem, so that an operator can observe the distance measurement information and the distant scenery simultaneously; laser receiving optics divides system and visual aiming optics divides system sharing objective lens group, image diversion beam splitter prism, projection display optics divides system and visual aiming optics divides system sharing graticule and eyepiece group, and visual aiming optics divides system can satisfy and observe 3km, and outside the field of vision about 350m for entire system realizes miniaturization and lightweight, can realize the range finding simultaneously, aims the observation, can show range finding data real-time, the utility model discloses an optical system has that the range finding is big, and is small, light in weight, environmental suitability is strong's characteristics.
2. The utility model discloses eyepiece group comprises a cemented lens and a biconvex mirror, and the multiplying power of visual aiming optics divides the system can reach 6 times, the outer natural target of distinguishable 3km, and the visual field is 6, can see the field of vision about 350m in 3km department.
3. The utility model discloses an optical filter is narrowband optical filter, has high transmissivity to 1064 nm's laser, can filter most stray light, improves the system signal to noise ratio.
4. The utility model discloses an optical system can use in civilian laser and military project target range field, is particularly suitable for the optical system as civilian laser range finder, military laser rangefinder and laser irradiator.
5. The utility model discloses all lenses all can be spherical lens, have reduced the processing degree of difficulty and cost.
Drawings
FIG. 1 is a light path diagram of a laser emission optical subsystem in a light-small multifunctional pulse laser ranging optical system of the present invention;
FIG. 2 is a light path diagram of a visual aiming optical subsystem in the light and small multifunctional pulse laser ranging optical system of the present invention;
FIG. 3 is a light path diagram of the laser receiving optical subsystem in the light and small multifunctional pulse laser ranging optical system of the present invention;
FIG. 4 is a light path diagram of a projection display optical subsystem in the light and small multifunctional pulse laser ranging optical system of the present invention;
FIG. 5 is an overall light path diagram of the light and small multifunctional pulse laser ranging optical system of the present invention;
fig. 6 is a schematic view of a relay splitting prism.
Wherein the reference numbers are as follows:
1-a first lens, 2-a second lens, 3-a first cemented lens, 4-a third lens, 5-a rotating image splitting prism, 51-a first right-angle prism, 52-a second right-angle prism, 53-a third right-angle prism, 6-a reticle, 7-a second cemented lens, 8-a fourth lens, 9-a light filter, 10-a detector, 11-an OLED display screen, 12-a projection condenser, 13-a projection reflector and 14-a laser.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments.
As shown in fig. 5, this embodiment provides a laser ranging optical system with a ranging range of 1-3km, which has a laser irradiation indication function, a visual aiming function, and a projection display function while achieving ranging, and displays ranging information in real time by using an optical projection technique.
The utility model provides a light small-size multi-functional pulse laser rangefinder optical system comprises laser emission optical subsystem, visual aiming optical subsystem, laser receiving optical subsystem and projection display optical subsystem, and laser emission optical subsystem is independent, and laser receiving optical subsystem, visual aiming optical subsystem, projection display optical subsystem share part light path for whole system structure is simplified, and the overall arrangement is compact, small, light in weight.
The laser emission optical division system is of a Galileo telescope structure, the beam expansion rate is 9 times, and the laser emission optical division system is used for compressing the divergence angle of laser beams emitted by the laser 14 to 0.25 mrad. The Galilean telescope structure is realized by two lenses which are sequentially arranged along the emitting light path direction of a laser 14, is used for expanding the diameter of a laser beam irradiating a target and compressing a laser divergence angle and is respectively a first lens 1 and a second lens 2, wherein the first lens 1 is a negative lens, the second lens 2 is a positive lens and is a spherical lens, the surfaces of the lenses are all coated with an antireflection film, a light path diagram is shown in figure 1, the wave aberration of a designed emitting system is very small, and therefore a large allowance is left for tolerance. The first lens 1 and the second lens 2 are respectively coated with a plurality of antireflection films, the transmittance of each surface is 0.98, and the total transmittance of the emission optical subsystem is 0.984＝0.92。
The optical sub-system for visual aiming is a telescope system, and the light path diagram is shown in fig. 2, and comprises an objective lens group, an image rotating beam splitter prism 5, a reticle 6 and an eyepiece lens group which are coaxially arranged along the light path direction in sequence. The objective lens group comprises a first cemented lens 3 and a third lens 4 which are coaxially arranged along a light path in sequence, when the objective lens is directly imaged on a reticle 6, the objective lens is an image which is opposite in upper, lower, left and right, therefore, an image rotating beam splitter prism 5 is added in the visual aiming optical subsystem, and the image rotating beam splitter prism 5 is used for turning over the inverted image formed by the objective lens group to enable the inverted image to be imaged; the image-rotating beam splitting prism 5 is a Prolo No. 2 prism, the Prolo No. 2 prism comprises a first right-angle prism 51, a second right-angle prism 52 and a third right-angle prism 53, the hypotenuse of the first right-angle prism 51 is glued with the second right-angle prism 52, and the right-angle side of the first right-angle prism 51 is glued with the third right-angle prism 53; the glue separation surfaces of the first right-angle prism 51 and the second right-angle prism 52 are plated with light splitting films, visible light is transmitted through the light splitting films and then passes through the second right-angle prism 52 to be observed to an observation eyepiece for visual aiming, received laser signals are reflected to the third right-angle prism 53 through the light splitting films and then pass through a narrow-band optical filter to be imaged to a receiving device for receiving laser echoes; the reticle 6 and the eyepiece group are sequentially arranged in a transmission light path of the light splitting film, and the Prolo No. 2 prism has the function of image rotation. The eyepiece group comprises a second cemented lens 7 and a fourth lens 8 which are coaxially arranged along a light path in sequence, and the fourth lens 8 is a convex lens. The distant object is imaged into a reverse image through the objective lens group, the image is imaged into a positive image after being rotated through the Prussian No. 2 prism, and the human eyes can clearly observe through the eyepiece group. The multiplying power of the visual aiming optical subsystem is 6 times, natural targets beyond 3km can be identified, the visual field is 6 degrees, and the visual field of about 350m can be seen at the position of 3 km. The diameter of the pupil of a human eye is 2mm in the daytime and is enlarged to more than 4mm at dusk or night. The telescope is dithered during viewing, and to accommodate these changes, the exit pupil diameter of the telescope is 4.2 mm.
The laser receiving optical sub-system is used for receiving laser echo, and the light path diagram is shown in fig. 3 and consists of an objective lens group of the visual aiming optical sub-system, a relay image splitting prism 5, an optical filter 9 and a detector 10; the laser receiving optical subsystem and the visual aiming optical subsystem share an objective lens group and a transfer beam splitter prism 5,
the transmitting system transmits laser, diffuse reflection occurs after the laser reaches a target, the returned laser beam enters the receiving mirror group, passes through the Prolo No. 2 prism, the glue separation surfaces of two right-angle prisms of the Prolo No. 2 prism are plated with light splitting films, the light splitting films transmit visible light to an observation eyepiece for visual aiming, and the received laser signal is reflected to a third prism, passes through a narrow-band light filter, is imaged to a receiving device and is used for receiving laser echo; the reticle 6 and the eyepiece group are sequentially arranged in a transmission light path of the light splitting film, the light splitting film reflects the received laser signal to the narrow band filter 9, and the laser signal is converged on a photodiode detector 10(APD) of the receiving system through the narrow band filter 9 (stray light is eliminated by the narrow band filter 9 and only infrared laser with the wavelength of 1064nm is transmitted through the narrow band filter 9) for receiving laser echo.
The projection display optical subsystem is used for displaying the measurement data and related information in an optical path, and an operator can observe a target and the measurement data clearly without interference behind an ocular. The projection display optical subsystem comprises an OLED display screen 11 (the light-emitting wavelength is 500-600nm and is driven by a single-chip microcomputer CPU to control and display information), a projection condenser 12 and a projection reflector 13 which are sequentially arranged along an optical path, and the optical path diagram is shown in FIG. 4. After the distance measurement is finished, the main circuit board finishes the distance measurement data processing and displays the result on the OLED display screen 11, then the result is imaged on the reticle 6 of the visual aiming subsystem through the projection system, an operator can clearly see the measurement data behind an eyepiece and observe an object at the same time; the projection reflector 13 is positioned above the reticle 6 and the ocular group; the OLED display screen 11 is used for giving cross information and distance information and controlling information display by the single chip microcomputer.
This embodiment entire system is by laser emission, sight, laser reception and projection display optics divide the system to constitute, and wherein laser emission system is independent, and laser reception optics divides the system and the objective lens group of sight optics divide the system to unite two into one, and projection display optics divides the system and the sight optics divides the shared eyepiece group of sight visually for entire system has more functions than laser range finder in the past in miniaturization and lightweight: the distance measuring device can measure distance, can aim at observation, can display distance measuring data in real time, can irradiate indication, and can adjust the optical axis. The laser range finder is particularly suitable for being used as an optical system of a civil laser range finder or a military laser range finder and a laser irradiator and applied to the fields of civil laser application and military target fields.
The laser emission system is independent and comprises a pulse laser 14, a first lens 1 and a second lens 2, the pulse laser 14 emits laser with the wavelength of 1064nm, the first lens 1 and the second lens 2 are both spherical lenses, and anti-reflection films with the wavelength of 1064nm are plated on the surfaces of the lenses, so that the laser emission system is simple in structure and easy to machine, install and adjust. The optical subsystem for visual aiming is composed of an objective lens group (comprising a first cemented lens 3 and a third lens 4), a No. 2 Prussian prism, a reticle 6 and an eyepiece lens group, wherein the lenses are spherical lenses, and the optical subsystem for visual aiming can meet the requirement of observing the visual field of about 350m beyond 3 km. The laser receiving optical subsystem and the visual aiming optical subsystem share part of optical elements and comprise an objective lens group, a Prolo No. 2 prism, a narrow-band filter 9 and a laser receiving detector 10. The narrow-band filter 9 has high transmittance to 1064nm laser, and can filter most stray light, thereby improving the signal-to-noise ratio of the system. The projection display optical subsystem is composed of an OLED display screen 11, a projection condensing lens 12 and a projection reflecting mirror 13, wherein the light-emitting wavelength of the OLED display screen 11 is 500-550nm, and the display information is controlled by a single chip microcomputer CPU. The projection condensing lens 12 is a spherical positive lens, the projection reflector 13 is a planar lens, and is located between the reticle 6 and the eyepiece group and outside the light path of the reticle 6 and the eyepiece group, as shown in fig. 4, the projection reflector 13 is installed at the upper right of the reticle 6, and the projection condensing lens 12 and the OLED display screen 11 are installed at the lower right of the reticle 6.
In the optical system of this embodiment, as shown in fig. 6, the puro No. 2 prism is a key element, and plays a role of both transferring images in the visual aiming optical subsystem and splitting light, so the coating requirements for the puro No. 2 prism are: a second right-angle prism 52 is glued at the bevel edge of a first right-angle prism 51 of a Proro No. 2 prism, and the glue separation surfaces of the two prisms are plated with a light splitting film which transmits visible light (450nm-850nm) and reflects a laser signal (1064nm) which is received back in a butt joint mode.
The optical system of this embodiment combines the laser receiving optical subsystem and the objective lens of the visual aiming optical subsystem together ingeniously for the system layout is compact, has reduced the volume of entire system greatly. Meanwhile, although the projection display system is independently designed, the projection display system is not completely separated from the whole system, so that an operator can observe ranging information and a distant scene at the same time. The dimensions of the whole system are: length 110mm, width 80mm, height 100 mm; the weight is 1kg, and the requirement of light and small size is met; the laser emission optical subsystem and the laser receiving optical subsystem are 1064nm, the visual aiming optical subsystem is 450-850nm, and the projection display optical subsystem is 500-600 nm.
The above description is only for the preferred embodiment of the present invention, and the technical solution of the present invention is not limited thereto, and any known modifications made by those skilled in the art on the basis of the main technical idea of the present invention belong to the technical scope to be protected by the present invention.
Claims (10)
1. The utility model provides a light small-size multi-functional pulse laser rangefinder optical system, includes laser emission optics subsystem, visual aiming optics subsystem and laser receiving optics subsystem which characterized in that:
the system also comprises a projection display optical subsystem;
the visual aiming optical subsystem comprises an objective lens group, an image rotating beam splitter prism (5), a reticle (6) and an eyepiece lens group which are sequentially arranged along the direction of a light path;
the objective lens group comprises a first cemented lens (3) and a third lens (4) which are coaxially arranged along a light path in sequence;
the image rotating beam splitter prism (5) is used for turning the image formed by the objective lens in a way of up-down and left-right reversal to form a positive image; the reticle (6) and the eyepiece group are sequentially arranged in a transmission light path of the rotating image splitting prism (5);
the eyepiece group comprises a second cemented lens (7) and a fourth lens (8) which are coaxially arranged along a light path in sequence;
the laser receiving optical subsystem and the visual aiming optical subsystem share an objective lens group and a transfer beam splitter prism (5); the laser receiving optical subsystem comprises the objective lens group, an image rotating beam splitter prism (5), an optical filter (9) and a detector (10); the optical filter (9) and the detector (10) are sequentially arranged in a reflection light path of the image-rotating beam splitter prism (5);
the projection display optical subsystem and the visual aiming optical subsystem share a reticle (6) and an eyepiece group, and the projection display optical subsystem comprises an OLED display screen (11), a projection condenser (12) and a projection reflector (13) which are sequentially arranged along a light path; the light path of the projection condensing lens (12) is vertical to the light path of the visual aiming subsystem, and the projection reflecting lens (13) is positioned between the reticle (6) and the eyepiece group and is positioned outside the light path of the reticle (6) and the eyepiece group; the OLED display screen (11) is used for displaying image information, and the image information comprises cross information and distance information; the projection condenser (12) is used for zooming and imaging the information presented on the OLED display screen (11) to the projection reflector (13); the projection reflector (13) is used for reflecting the image of the projection information to the reticle (6).
2. The light and small multifunctional pulse laser ranging optical system according to claim 1, characterized in that:
the image rotating splitting prism (5) is a Prolo No. 2 prism, the Prolo No. 2 prism comprises a first right-angle prism (51), a second right-angle prism (52) and a third right-angle prism (53), the hypotenuse of the first right-angle prism (51) is glued with the second right-angle prism (52), and the right-angle side of the first right-angle prism (51) is glued with the third right-angle prism (53); the light splitting film is plated on the adhesive isolation surface of the first right-angle prism (51) and the second right-angle prism (52), the second right-angle prism (52) is located in the light path of the light splitting film in a transmission mode, and the third right-angle prism (53) is located in the light path of the light splitting film in a reflection mode.
3. The light and small multifunctional pulse laser ranging optical system according to claim 1, characterized in that:
the laser emission optical division system is of a Galileo telescope structure, and the Galileo telescope structure comprises a first lens (1) with negative focal power and a second lens (2) with positive focal power, which are sequentially arranged along the direction of an emergent light path.
4. A light and small multifunctional pulse laser ranging optical system according to claim 3, characterized in that: the first lens (1) and the second lens (2) are both spherical lenses, and antireflection films are plated on the surfaces of the spherical lenses.
5. A light and small multifunctional pulse laser ranging optical system according to claim 1, 2, 3 or 4, characterized in that:
the third lens (4) is a biconvex lens with positive focal power;
the fourth lens (8) is a biconvex lens.
6. The light and small multifunctional pulse laser ranging optical system according to claim 5, characterized in that:
the projection reflector (13) is a biconvex lens with positive focal power.
7. The light and small multifunctional pulse laser ranging optical system according to claim 6, characterized in that:
the filter (9) is a narrow-band filter, and the detector (10) is a photodiode detector.
8. The light and small multifunctional pulse laser ranging optical system according to claim 7, characterized in that:
the projection condenser (12) and the projection reflector (13) are respectively positioned outside the light path of the reticle (6) and the eyepiece group.
9. The light and small multifunctional pulse laser ranging optical system according to claim 1, characterized in that:
the distance between the OLED display screen (11) and the projection mirror (13) is 68.37 mm;
the distance from the first cemented lens (3) to the exit pupil surface of the ocular lens is 91.44 mm;
the diameter of the first cemented mirror (3) is 17 mm.
10. The light and small multifunctional pulse laser ranging optical system according to claim 9, characterized in that: all lenses are spherical lenses.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920620950.2U CN209877943U (en) | 2019-04-30 | 2019-04-30 | Light small-sized multifunctional pulse laser ranging optical system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920620950.2U CN209877943U (en) | 2019-04-30 | 2019-04-30 | Light small-sized multifunctional pulse laser ranging optical system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044323A (en) * | 2019-04-30 | 2019-07-23 | 中国科学院西安光学精密机械研究所 | A kind of small-sized multifunctional pulse laser ranging optical system |
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2019
- 2019-04-30 CN CN201920620950.2U patent/CN209877943U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044323A (en) * | 2019-04-30 | 2019-07-23 | 中国科学院西安光学精密机械研究所 | A kind of small-sized multifunctional pulse laser ranging optical system |
| CN110044323B (en) * | 2019-04-30 | 2024-04-05 | 中国科学院西安光学精密机械研究所 | Light and small multifunctional pulse laser ranging optical system |
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