CN109343026B - Optical system of laser television all-in-one machine based on binary surface - Google Patents
Optical system of laser television all-in-one machine based on binary surface Download PDFInfo
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- CN109343026B CN109343026B CN201811209393.1A CN201811209393A CN109343026B CN 109343026 B CN109343026 B CN 109343026B CN 201811209393 A CN201811209393 A CN 201811209393A CN 109343026 B CN109343026 B CN 109343026B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
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Abstract
The invention relates to a laser television all-in-one machine optical system based on a binary surface.A front fixed group lens consists of a first front fixed lens and a second front fixed lens which are sequentially arranged along the propagation direction of a light path, wherein the first front fixed lens is provided with at least one binary surface of which one surface is arranged along the propagation direction of the light path; the invention adopts the integrated design of the laser television to improve the integrated design of the system, adopts the structural surface shape of a binary surface to reduce the weight of the system, and adopts the light analysis mirror to perform light splitting twice to improve the high functional density of the optical system. The laser with different wavelengths is detected in a filter switching mode, and the universality of a laser system is realized. Compared with the similar products, the integrated design concept of the laser television improves the integrated design of the system; the reasonable design of the binary surface reduces the volume and the weight of the system; the application of the light splitting of the light-splitting mirror improves the high functional density of the optical system; the multi-band design of the laser system enables versatility of the system.
Description
Technical Field
The invention relates to the technical field of photoelectric equipment, in particular to an optical system of a laser television all-in-one machine based on a binary surface.
Background
The laser ranging technology and the television imaging technology are widely applied to television guidance and photoelectric reconnaissance, and when a target is observed and tracked, the method not only can meet the requirement of searching and capturing the near part of a fast flying object, but also can meet the requirement of tracking the object flying at a low speed or a medium speed and a long distance; meanwhile, accurate distance measurement is carried out on the tracked target in the same time, and the actual position of the target is confirmed, so that the requirements for high functional density and integrated design of an optical system are improved.
In order to ensure that high-definition imaging and accurate distance measurement are realized for targets with different distances in a certain range in battle activities such as television guidance and photoelectric reconnaissance, an optical system of a laser television all-in-one machine, which can be applied to activities such as photoelectric reconnaissance, is provided.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides an optical system of a laser television all-in-one machine based on a binary surface, and improves the high functional density and the integrated design of the optical system.
The invention is realized by the following technical scheme:
a laser television all-in-one optical system based on binary planes comprises: a rear emission group lens for emitting laser, a front emission group lens for receiving laser collimated by the rear emission group lens and collimating again, a front fixed group lens for receiving laser reflected by diffusion, an optical analysis lens group for splitting light, a rear group lens for compensating residual aberration of the laser split by the optical analysis lens group, the first filter lens group is used for filtering the laser compensated by the rear group lens, the prism group is used for secondarily refracting the light reflected by the light analyzing lens group, the zoom group lens is used for zooming the light refracted by the prism group, the compensation group lens is used for compensating the light zoomed by the zoom group lens, the rear fixed group lens is used for compensating the residual aberration of the light compensated by the compensation group lens, and the second filter lens group is used for imaging the light in the rear fixed group lens on the CCD target surface;
the rear emission group lens and the front emission group lens are sequentially arranged along the light path propagation direction and form a laser emission system, the front fixed group lens, the light analysis lens group, the rear group lens and the first light filtering lens group are sequentially arranged along the light path propagation direction and form a laser receiving system, and the laser emission system and the laser receiving system form a laser ranging system;
the front fixed group lens, the light analysis lens group, the prism group, the zoom group lens, the compensation group lens, the rear fixed group lens and the second filter group are sequentially arranged along the propagation direction of the light path and form a continuous zooming television system;
the front fixed group lens consists of a first front fixed lens and a second front fixed lens which are sequentially arranged along the propagation direction of the light path, and the first front fixed lens is provided with at least one binary surface arranged along the propagation direction of the light path.
In a further development of the invention, the first surface of the first front fixed lens in the direction of propagation of the light path is a binary surface.
According to the invention, the laser comprises a solid 1064nm fundamental frequency laser and a solid 1550nm fundamental frequency laser, and the solid 1064nm fundamental frequency laser or the solid 1550nm fundamental frequency laser outputs continuous laser or pulse laser.
In a further improvement of the present invention, the first filter set comprises two filters for detecting the 1064nm laser and the 1550nm laser by switching the filters.
The invention is further improved in that the light analysis mirror group adopts a semi-transparent and semi-reflective coating mode.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts the integrated design of the laser television to improve the integrated design of the system, adopts the structural surface shape of a binary surface to reduce the weight of the system, and adopts the light analyzing mirror to perform light splitting twice to improve the high functional density of the optical system. The laser with different wavelengths is detected in a filter switching mode, and the universality of a laser system is realized. Compared with the similar products, the integrated design concept of the laser television improves the integrated design of the system; the reasonable design of the binary surface reduces the volume and the weight of the system; the application of the light splitting of the light analyzing mirror improves the high functional density of the optical system; the multi-band design of the laser system enables versatility of the system. After the product is provided with the structural component, the imaging component and the circuit control, the photoelectric tracking and reconnaissance device can be assembled on various airborne and vehicle-mounted photoelectric tracking and reconnaissance devices.
Drawings
FIG. 1 is a schematic diagram of an optical system in accordance with an embodiment of the present invention;
fig. 2 is a schematic diagram of a conventional continuous zoom television and laser ranging optical system.
The reference numbers are as follows:
1. the optical lens comprises a front emission group lens, a rear emission group lens, a front fixed group lens, a rear emission group lens, a rear fixed group lens, a beam splitter group, a rear group lens, a first filter group, a prism group, a variable power group lens, a compensation group lens, a rear fixed group lens, a second filter group and a compensation group lens, wherein the front emission group lens is 2, the rear emission group lens is 3, the front fixed group lens is 4, the beam splitter group is 5, the rear group lens is 6, the first filter group is 7, the prism group is 8, the variable power group lens is 9, the compensation group lens is 10, and the rear fixed group lens is 11.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, an optical system of a laser-television all-in-one machine based on a binary plane includes: a transmitting rear group lens 2 used for transmitting laser, a transmitting front group lens 1 used for receiving laser collimated by the transmitting rear group lens 2 and collimating again, a front fixed group lens 3 used for receiving laser reflected by diffusion, an analyzing lens group 4 used for splitting light, a rear group lens 5 used for compensating residual aberration of the laser split by the analyzing lens group 4, a first filter group 6 for filtering the laser light compensated by the rear group lens 5, a prism group 7 for secondarily folding the light reflected by the prism group 4, a zoom group lens 8 for zooming the light folded by the prism group 7, a compensation group lens 9 for compensating the light zoomed by the zoom group lens 8, a rear fixed group lens 10 for compensating the residual aberration of the light compensated by the compensation group lens 9, and a second filter group 11 for imaging the light in the rear fixed group lens 10 on the CCD target surface;
the rear emission group lens 2 and the front emission group lens 1 are sequentially arranged along the light path propagation direction and form a laser emission system, the front fixed group lens 3, the light analysis lens group 4, the rear group lens 5 and the first filter lens group 6 are sequentially arranged along the light path propagation direction and form a laser receiving system, and the laser emission system and the laser receiving system form a laser ranging system;
the front fixed group lens 3, the light analysis lens group 4, the prism group 7, the zoom group lens 8, the compensation group lens 9, the rear fixed group lens 10 and the second filter group 11 are sequentially arranged along the propagation direction of the light path to form a continuous zooming television system;
the front fixed group lens 3 is composed of a first front fixed lens and a second front fixed lens which are sequentially arranged along the propagation direction of the light path, and the first front fixed lens is provided with at least one binary surface arranged along the propagation direction of the light path.
In the above technical solution, the rear fixed group lens 10 can be used to implement a focusing function of a continuous zooming television system, ensure stable precision of an optical axis in a focusing process, and ensure clear imaging of the television system in a high-temperature and low-temperature environment experiment. The focusing mechanism of a common continuous zooming television is arranged on the front fixed group lens 3, and the optical axis can shake in the focusing process due to the large caliber and heavy weight of the front fixed group lens 3, so that the stability and precision of the optical axis of the system are influenced.
In specific implementation, the first surface of the first front fixed lens along the propagation direction of the optical path is a binary surface, the other surfaces are all common surface shapes, the glass of the common surface shapes is easy to process, the binary optical element is a phase type diffraction optical element, the diffraction phase profile is designed by using the diffraction effect of light as the basic working principle and adopting the analysis of an optical wave surface. The current methods for manufacturing the binary optical element mainly comprise an etching method in a microelectronic process, a high-precision diamond lathe program control cutting method and the like. The adoption of the surface shape of the binary surface can reduce the number of the lenses of the front fixed group lens 3 and simultaneously reduce the volume and the weight of the whole system.
More specifically, the front fixed group is generally structured in a three-lens mode, and a binary surface structure is adopted, so that one lens is reduced for the front fixed group, and the weight of the system is reduced. The chromatic dispersion of the diffraction element is irrelevant to materials, the chromatic dispersion coefficient is a negative number, and by utilizing the property, a binary optical element is engraved on the first surface of the first positive lens in the front fixed group lens 3 and is used for correcting the chromatic aberration of the system, so that the imaging quality of the optical system is ensured, and the weight of the system is reduced. The front fixed group lens 3 of the conventional continuous variable power optical system can only be achromatized by using a combination of a positive lens and a negative lens, so that the binary optical element has obvious advantages in lens achromatization and reduction in weight and volume of the element.
When the laser is specifically implemented, the laser comprises a solid 1064nm fundamental frequency laser and a solid 1550nm fundamental frequency laser, and the solid 1064nm fundamental frequency laser or the solid 1550nm fundamental frequency laser outputs continuous laser or pulse laser.
More specifically, the zoom lens assembly 8 includes two cemented parts, the compensation lens assembly 9 includes a single lens and a cemented part sequentially arranged along the optical path propagation direction, and the rear fixed lens assembly 10 includes two cemented parts and two single lenses alternately arranged along the optical path propagation direction according to the sequence of the cemented parts and the single lenses.
In the above technical solution, the prism group 7 is used for performing secondary refraction on the light reflected by the analyzer group 4, so that the reflected light enters the zoom group lens 8, the compensation group lens 9, the rear fixed group lens 10 and the filter group 11, and the final light is imaged on the CCD target surface. The zoom group lens 8 and the compensation group lens 9 realize continuous zoom, the rear fixed group lens 10 compensates the residual aberration in the front, and the focusing function of the television system is realized by moving the rear fixed group lens 10, so that the imaging of the television system in a high-temperature and low-temperature experiment is clear.
During the concrete implementation, first filter group 6 includes two optical filters, and the wave band that adopts has 1064nm and 1550nm two kinds in the laser rangefinder system design, and 1064nm laser and 1550nm two kinds of laser can all be used in the laser rangefinder, realize the commonality of system, and the laser of the same way can be measured a distance simultaneously, and the laser of the same way can be used for shining, provides the guide for the emittance. The first filter group 6 is provided with two filters, and the 1064nm laser and the 1550nm laser are respectively detected in a filter switching mode, so that the laser ranging function is realized; the positions of the image points of the two lasers are ensured to be consistent in the system design process, and parallax cannot be brought in the filter switching process. The traditional laser ranging method adopts a single waveband, is single in mechanism form and poor in universality.
In specific implementation, the light analysis mirror group 4 adopts a semi-transparent and semi-reflective coating mode and has the functions of splitting natural light rays of a target and a background and laser reflected in a diffuse manner, and a part of the diffuse reflection laser enters the detectors of 1064nm and 1550nm to realize laser ranging; part of natural light rays are imaged on a CCD target surface of a continuous zoom television through a prism, so that targets at different distances are monitored; the traditional light splitting mode adopts prism light splitting, and the prism light splitting has the defects of large volume and weight, and the film layer is easily damaged due to the fact that energy of 1064nm laser and 1550nm laser is large; the requirements on the glue layer of the cemented prism are severe. And the light analysis lens group 4 is used for light splitting, so that the weight of the system can be reduced, and laser damage can be prevented.
More specifically, the light analysis lens group 4 is used for splitting natural light of a target and a background and laser reflected in a diffuse manner, and a part of the diffuse reflected laser is imaged on a laser detector through the rear group lens 5 and the first filter lens group 6 to realize laser ranging; and part of natural light rays are imaged on a CCD target surface of the continuous zoom television through a prism, so that targets at different distances are monitored. The light analysis mirror group 4 adopts a semi-transparent and semi-reflective coating method to perform twice light splitting on light so as to improve the high functional density of the optical system; the rear group lens 5 compensates the residual aberration of the 1064nm laser and the 1550nm laser, and ensures the imaging quality of the two lasers; the 1064nm laser and the 1550nm laser are respectively detected in a filter switching mode, and the universality of the laser ranging system is realized.
The laser television all-in-one machine can realize image monitoring and accurate distance measurement on targets with different distances in a certain range, thereby improving the high functional density of the lens and reducing the volume and weight of the system. At present, the traditional single zoom television and laser ranging lens are mainly applied to various airborne and vehicle-mounted photoelectric tracking and reconnaissance devices, and the zoom television lens is used for searching, observing and tracking targets; the laser ranging lens is used for accurately ranging the target. The space reserved for the zoom television and the laser ranging lens in the photoelectric tracking and reconnaissance equipment is limited, the multifunctional requirement is met, and the requirement on volume and weight is strict. And the laser television all-in-one machine is adopted, so that the distance measurement, the search, the observation and the tracking of the target can be realized, the high functional density of the lens is improved, and the advantage is achieved in the reduction of the volume and the weight of the system.
On the basis of the implementation process, the imaging quality of the obtained image quality diagram of the laser television all-in-one machine, the continuous zooming television and the laser ranging system reaches the diffraction limit, and the imaging quality is excellent. The laser television all-in-one machine has the advantage of reducing the volume and weight of the system compared with the traditional single continuous zooming television and laser ranging system (shown in figure 2).
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. The utility model provides a laser TV all-in-one optical system based on binary face which characterized in that includes: a rear transmitting group lens (2) used for transmitting laser, a front transmitting group lens (1) used for receiving laser collimated by the rear transmitting group lens (2) and collimating again, a front fixed group lens (3) used for receiving the laser reflected by diffusion, an analyzing lens group (4) used for splitting, a rear group lens (5) used for performing residual aberration compensation on the laser split by the analyzing lens group (4), a first filter group (6) used for filtering the laser compensated by the rear group lens (5), a prism group (7) used for performing secondary refraction on the light reflected by the analyzing lens group (4), a variable-magnification group lens (8) used for performing variable-magnification on the light refracted by the prism group (7), a compensation group lens (9) used for compensating the light multiplied by the variable-magnification group lens (8), a rear fixed group lens (10) used for compensating the residual light compensated by the compensation group lens (9), a rear fixed group lens (10) used for compensating the residual aberration of the laser, The second filter group (11) is used for imaging light rays in the rear fixed group lens (10) on a CCD target surface, the laser is used for emitting laser of different wave bands, and the detector is used for measuring distance;
the rear emission group lens (2) and the front emission group lens (1) are sequentially arranged along the light path propagation direction and form a laser emission system, the front fixed group lens (3), the light analysis lens group (4), the rear group lens (5) and the first light filtering lens group (6) are sequentially arranged along the light path propagation direction and form a laser receiving system, and the laser emission system and the laser receiving system form a laser ranging system;
the front fixed group lens (3), the light analysis lens group (4), the prism group (7), the zoom group lens (8), the compensation group lens (9), the rear fixed group lens (10) and the second filter lens group (11) are sequentially arranged along the light path propagation direction to form a continuous zooming television system;
the front fixed group lens (3) consists of a first front fixed lens and a second front fixed lens which are sequentially arranged along the propagation direction of the light path, a first surface in the first front fixed lens along the propagation direction of the light path is a binary surface, and other surfaces are common surface shapes;
the rear fixed group lens (10) can be used for realizing the focusing function of the continuous zooming television system, so that the stability and the precision of an optical axis in the focusing process are ensured, and the imaging clarity of the television system in a high-temperature and low-temperature environment experiment is ensured.
2. The optical system of the laser television all-in-one machine based on the binary surface as claimed in claim 1, wherein: the laser comprises a solid 1064nm fundamental frequency laser and a solid 1550nm fundamental frequency laser, and the solid 1064nm fundamental frequency laser or the solid 1550nm fundamental frequency laser outputs continuous laser or pulse laser.
3. The optical system of the laser television all-in-one machine based on the binary surface as claimed in claim 2, wherein: the first filter set (6) comprises two filters for detecting 1064nm laser and 1550nm laser by switching the filters.
4. The optical system of the laser television all-in-one machine based on the binary surface as claimed in claim 1, wherein: the light analysis lens group (4) adopts a semi-transparent and semi-reflective coating mode.
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| CN110849475A (en) * | 2019-12-20 | 2020-02-28 | 孝感华中精密仪器有限公司 | High-power optical fiber laser synthesis and sampling device based on reflection type optical system |
| CN111787203B (en) * | 2020-07-14 | 2021-08-06 | 孝感华中精密仪器有限公司 | Camera and video all-in-one machine based on image space scanning |
| CN111766703B (en) * | 2020-07-14 | 2022-07-01 | 孝感华中精密仪器有限公司 | Modeling method of optical system of video camera and recorder all-in-one machine based on image space scanning |
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