CN209927419U - Large-caliber off-axis reflection type multi-optical-axis consistency quantitative test and calibration device - Google Patents
Large-caliber off-axis reflection type multi-optical-axis consistency quantitative test and calibration device Download PDFInfo
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- CN209927419U CN209927419U CN201920919232.5U CN201920919232U CN209927419U CN 209927419 U CN209927419 U CN 209927419U CN 201920919232 U CN201920919232 U CN 201920919232U CN 209927419 U CN209927419 U CN 209927419U
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Abstract
The utility model discloses a large-caliber off-axis reflective multi-optical-axis consistency quantitative test and calibration device, which comprises a large-caliber off-axis reflective collimator assembly, a CCD camera, an image acquisition processing assembly and a three-dimensional adjustment platform; the large-caliber off-axis reflective collimator assembly, the CCD camera and the image acquisition and processing assembly are arranged on the three-dimensional adjusting platform; the large-aperture off-axis reflective collimator component comprises a multispectral light source, a cross target, a spectroscope, a secondary reflector, a main reflector, an attenuation sheet and a plane reflector for auto-collimation; a spectroscope is arranged between the secondary reflector and the cross target, a multispectral light source is arranged in front of the cross target, a CCD camera is arranged beside the spectroscope, the primary reflector is matched with the secondary reflector, and the planar reflector is arranged in front of the primary reflector. The utility model discloses but wide application in the many optical axes uniformity of various platform multiband optoelectronic equipment detect and the calibration.
Description
Technical Field
The utility model relates to a photoelectric equipment detects technical field, and more specifically says, relates to a many optical axis uniformity quantitative test of heavy-calibre off-axis reflective and calibrating device, and it is applicable to the optical axis uniformity quantitative test and the calibration of multispectral photoelectric equipment.
Background
The photoelectric equipment has obvious advantages in night vision, high-precision tracking, anti-stealth and other aspects, and becomes a key point for the development of high-technology military and civil equipment. Photoelectric equipment is often provided with photoelectric sensors such as a visible light imaging device, a laser distance measuring machine, a medium wave infrared thermal imager, a long wave infrared thermal imager and the like, the coverage wave band is wide, a plurality of optical axes such as visible light, laser, medium wave infrared, long wave infrared and the like exist, the consistency between the optical axes is a key technical index for measuring the system performance of the multispectral photoelectric equipment, and the aiming precision and the laser distance measurement distance of the photoelectric equipment are restricted. In the actual production and assembly process, the consistency among the optical axes can drift due to the influence of processing errors, the precision of assembly and adjustment equipment and environmental conditions, so that the multi-optical-axis consistency detection and calibration of the photoelectric equipment are required to be carried out, and the multi-optical-axis consistency errors are controlled within the range allowed by the measurement precision, so as to ensure the service performance of the photoelectric equipment.
The currently common optical axis consistency test methods mainly comprise: projection target method, laser photographic paper detection method, pentaprism method, small-bore parallel light tube method, etc. The projection target method and the laser photographic paper detection method have simple structures and low cost, but have larger random error and limited precision; the pentaprism method is commonly used for detecting the consistency of optical axes of binoculars and has low universality; the small-caliber collimator method has the advantages of easy and light manufacture and the defects of small caliber, difficult immersion of the whole system to be measured by parallel beams, more error links and low precision.
SUMMERY OF THE UTILITY MODEL
The defect to optical axis uniformity test method commonly used, the utility model aims to provide a many optical axis uniformity quantitative test of heavy-calibre off-axis reflection formula and calibrating device adopts heavy-calibre off-axis reflection formula parallel light pipe method, photoelectric detection technique and digital image processing technique, has solved that current detection device measures that the bore is little, measure that the random error is big, the problem that measurement accuracy is restricted.
The purpose of the utility model is realized through the following technical scheme:
a large-caliber off-axis reflective multi-optical-axis consistency quantitative test and calibration device comprises a large-caliber off-axis reflective collimator assembly, a CCD camera, an image acquisition and processing assembly and a three-dimensional adjusting platform;
the large-caliber off-axis reflective collimator assembly, the CCD camera and the image acquisition and processing assembly are arranged on the three-dimensional adjusting platform;
the large-aperture off-axis reflective collimator component comprises a multispectral light source, a cross target, a spectroscope, a secondary reflector, a main reflector, an attenuation sheet and a plane reflector for auto-collimation;
the CCD camera is arranged on a CCD camera branch focal plane formed by the spectroscope in the large-caliber off-axis reflective collimator assembly, and the center of a sensitive surface of the CCD camera is aligned with a main optical axis of the CCD camera branch; the image acquisition processing assembly is connected with the CCD camera through a cable;
the multispectral light source is arranged in front of the cross target, the CCD camera is arranged beside the spectroscope, the main reflector is matched with the secondary reflector, and the auto-collimation plane reflector is arranged in front of the main reflector and is perpendicular to a main optical axis of the large-aperture off-axis reflection type collimator tube component. The multispectral light source, the cross target, the spectroscope, the secondary reflector and the main reflector form a collimator branch. The main reflector, the secondary reflector, the spectroscope and the attenuation sheet form a CCD camera branch.
As a preferred mode, an attenuation sheet is arranged between the spectroscope and the CCD camera and used for attenuating pulse laser energy emitted by a laser range finder of the tested photoelectric equipment, so that the CCD camera is prevented from being damaged.
Preferably, the attenuation sheet is a combination of three attenuation sheets with different attenuation rates, wherein the three attenuation sheets have the OD:1.0, the OD:2.0 and the OD: 3.0.
Preferably, the main reflector is a parabolic mirror, and the coefficient k of the quadric surface is-1; the secondary reflector is a hyperboloid mirror, and the coefficient k of the quadric surface is < -1.
Preferably, the plane mirror is made of K9 glass, silver-plated surface and dielectric protective film.
Preferably, the spectroscope is placed at 45 degrees to form a pair of conjugate focal planes, a cross target is placed on one focal plane, and a multispectral light source is used for irradiation to form a point light source; and a CCD camera is arranged on the other focal plane and is used for detecting the laser spot position of the measured photoelectric equipment arranged in front of the large-caliber off-axis reflective collimator assembly. When the CCD is used for collecting laser spots, the auto-collimation image of the cross target can be reflected to the CCD through the spectroscope to obtain the laser aiming center of the tested photoelectric equipment, when the tested photoelectric equipment emits laser through the parallel light path, the spectroscope reflects the laser to obtain an image of the laser spots on the CCD, and the CCD camera collects the auto-collimation image of the cross target and laser spot signals of the tested photoelectric equipment and outputs digital image signals.
Preferably, the spectroscope is made of multispectral CVDZnS material.
Preferably, the off-axis reflective long-focus optical system with the aperture of more than 250mm is adopted, and the working waveband is 0.5-12 μm.
Preferably, the multispectral light source adopts a halogen lamp, and the working wavelength band is 0.5-12 μm.
The utility model has the advantages that:
the utility model discloses based on the demand that many optical axes uniformity of optoelectronic equipment detected, designed many optical axes uniformity quantitative test of heavy-calibre off-axis reflection formula and calibrating device, can realize the on-the-spot developments quantitative measurement and the calibration of the two liang of optical axis uniformity of multiband optoelectronic equipment visible light/laser/medium wave/long wave. The device has the advantages of wide spectrum range, good image quality, high measurement precision, simple operation, strong practicability and the like, and can be widely applied to multi-optical-axis consistency detection and calibration of various platform photoelectric equipment.
Drawings
Fig. 1 is a schematic structural diagram of a large-caliber off-axis reflection type multi-optical-axis consistency quantitative test and calibration device according to an embodiment of the present invention;
FIG. 2 is a light path diagram of the large-aperture off-axis reflective collimator assembly of FIG. 1;
FIG. 3 is a modulation transfer function MTF of the collimator branch of FIG. 2;
FIG. 4 is a diagram of the modulation transfer function MTF of the CCD camera arm of FIG. 2;
in the figure, 1-a multispectral light source, 2-a cross target, a 3-spectroscope, a 4-secondary reflector, a 5-main reflector, 6-an attenuation sheet, a 7-plane reflector, 100-a large-caliber off-axis reflective collimator component, a 200-CCD camera, 300-an image acquisition processing component and 400-a three-dimensional adjusting platform.
Detailed Description
The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.
As shown in fig. 1 and fig. 2, a large-caliber off-axis reflective multi-optical-axis consistency quantitative testing and calibrating device comprises a large-caliber off-axis reflective collimator assembly 100, a CCD camera 200, an image acquisition processing assembly 300 and a three-dimensional adjusting platform 400;
the CCD camera 200 is arranged on a CCD camera branch focal plane formed by a spectroscope in the large-caliber off-axis reflective collimator assembly 100, and the center of a sensitive plane of the CCD camera 200 is aligned with a main optical axis of the CCD camera branch. The image acquisition processing assembly 300 is connected with the CCD camera 200 through a cable;
the large-caliber off-axis reflective collimator assembly 100, the CCD camera 200 and the image acquisition processing assembly 300 are arranged on the three-dimensional adjusting platform 400;
the large-aperture off-axis reflective collimator assembly 100 comprises a multispectral light source 1, a cross target 2, a spectroscope 3, a secondary reflector 4, a main reflector 5, an attenuation sheet 6 and a plane reflector 7 for auto-collimation;
a spectroscope 3 is arranged between a secondary reflector 4 and a cross target 2, a multispectral light source 1 is arranged in front of the cross target 2, a CCD camera 200 (the CCD camera 200 comprises a CCD sensor and an imaging module) is arranged beside the spectroscope 3, a primary reflector 5 is matched with the secondary reflector 4, and an auto-collimation plane reflector 7 is arranged in front of the primary reflector 5 and is vertical to a main optical axis of the large-caliber off-axis reflection type parallel light tube component 100. The multispectral light source 1, the cross target 2, the spectroscope 3, the secondary reflector 4 and the main reflector 5 form a parallel light pipe branch. The main reflector 5, the secondary reflector 4, the spectroscope 3 and the attenuation sheet 6 form a CCD camera branch.
In a preferred embodiment, an attenuation sheet 6 is arranged between the spectroscope 3 and the CCD camera 200, and the attenuation sheet 6 is used for attenuating the pulse laser energy emitted by the laser range finder of the measured photoelectric equipment, so as to avoid damaging the CCD camera 200.
In a preferred embodiment, the attenuation sheet 6 is a combination of three attenuation sheets with different attenuation rates, namely OD:1.0, OD:2.0 and OD: 3.0.
In a preferred embodiment, the image acquisition processing assembly 300 includes: a Dalsa X64-CL image acquisition card, an IPC-911B-H industrial personal computer and FPGA image data processing software.
The image acquisition processing assembly 300 processes the input digital image signals of the CCD camera 200, the imaging signals of the cross target 2 by the visible light imaging device of the measured photoelectric device and the medium-wave and long-wave thermal infrared imagers, and calculates the deviation between the two optical axes of the measured photoelectric device.
In a preferred embodiment, the primary mirror 5 is a parabolic mirror, and the conic coefficient k is-1; the secondary reflector 4 is a hyperboloid mirror, and the coefficient k of the quadric surface is < -1.
In a preferred embodiment, the plane mirror 7 is used for reflecting the self-aligned image of the cross target 2 to obtain the aiming center of the laser of the measured photoelectric device, and K9 glass, silver plating on the surface and a medium protective film are adopted.
In a preferred embodiment, the beam splitter 345 ° is placed to form a pair of conjugate focal planes, on one of which the cross target 2 is placed, and illuminated with the multispectral light source 1 to form a point light source; and a CCD camera 200 is placed on the other focal plane and used for detecting the laser spot position of the measured photoelectric device arranged in front of the large-caliber off-axis reflective collimator assembly 100. The large-aperture off-axis reflective collimator assembly 100, when collecting laser spot with CCD, can reflect the auto-collimation image of the cross target 2 to CCD through the spectroscope 3, get the aiming center of the laser of the photoelectric equipment to be measured, when the photoelectric equipment to be measured emits laser through the parallel light path, the spectroscope 3 reflects the laser, get the image of the laser spot on CCD, CCD camera 200 collects the auto-collimation image of the cross target 2 and the laser spot signal of the photoelectric equipment to be measured, output the digital image signal.
In a preferred embodiment, the spectroscopic 3 uses a multi-spectral cvdtzns material.
In a preferred embodiment, the collimator has a caliber D of 300mm, a focal length f of 3600mm, a field of view 2 ω of 0.3 °, and an operating wavelength λ of 0.5 μm to 12 μm.
In a preferred embodiment, the multispectral light source 1 adopts a halogen lamp, and the working wave band is 0.5-12 μm.
The optical path of the collimator is shown in fig. 2, the longer the wavelength of the system is, the easier the optical design can reach the diffraction limit, so the 1.064 μm waveband is mainly considered in the design process, the system is used under the room temperature condition, the modulation transfer function MTF at the 1.064 μm position is shown in fig. 3, and the image quality of the optical branch of the collimator is close to the diffraction limit, so that the use requirement is met.
The operation mode of the CCD camera 200 branch is as follows: 1.064 μm laser emitted by the photoelectric device to be detected is primarily reflected by the primary reflector 5, secondarily reflected by the secondary reflector 4 and reflected by the multispectral CVDZnS spectroscope 3 for three times, attenuated and transmitted by the attenuator 6, and finally converged on the focal plane of the CCD camera 200 to be imaged, and a laser spot image is output. The CCD camera 200 collects the auto-collimation image of the cross target 2 and the laser spot signal of the photoelectric device 1.064 μm to be measured, and outputs a digital image signal. When the CCD camera is used under the room temperature condition, the modulation transfer function MTF at the position of 1.064 mu m is shown in FIG. 4, and as can be seen from the modulation transfer function, the image quality of the optical branch of the CCD camera 200 is close to the diffraction limit, and the use requirement is met.
The image acquisition processing assembly 300 processes the input CCD digital image signal, the imaging signal of the multispectral light source 1 by the visible light imaging device of the measured photoelectric device and the thermal infrared imager of medium and long waves, detects and extracts the size, the gray level and the centroid position of the light spot, and rapidly calculates the deviation between the optical axes of the measured photoelectric device.
The technical scheme of the utility model in, provide collimated light source and receive radiation light by heavy-calibre off-axis reflection formula collimator subassembly 100, CCD camera 200 gathers and exports cross target 2's auto-collimation image and is surveyed the digital image signal of opto-electronic equipment laser facula, calculates the deviation between each optical axis of the opto-electronic equipment fast through image acquisition processing assembly 300 to the many optical axes uniformity quantitative test and the calibration of opto-electronic equipment have been realized.
The large-caliber off-axis reflective parallel light tube method adopts a large-caliber off-axis parabolic reflector to generate parallel light beams, and the limitation of a reflecting system by materials is small, so that the large-caliber and light-weight design is convenient to realize, and chromatic aberration is avoided; compared with the coaxial reflection system, the off-axis reflection system has a larger view field, no central blocking, good image quality and high transmittance. The large-caliber off-axis reflective parallel light tube method has few error links and high measurement precision, and can be applied to a high-precision multi-optical-axis consistency detection and correction system.
Compared with the prior art, the utility model has the advantages that:
1. the off-axis reflection type is adopted to realize the design of large caliber and light weight;
2. the device has a large view field and no central blocking, and the output image quality is good;
3. and the multi-optical-axis consistency test and calibration results are calculated in real time, and the measurement precision is high.
The device of the utility model is simple in structure, convenient operation, swift accuracy, but the uniformity of the many optical axes of the various platform photoelectric equipment of quick test and calibration.
The above description is only exemplary of the present invention and should not be taken as limiting, and all changes, equivalents, and improvements made within the spirit and principles of the present invention should be understood as being included in the scope of the present invention.
Claims (9)
1. The utility model provides a many optical axis uniformity quantitative test of heavy-calibre off-axis reflection formula and calibrating device which characterized in that: the large-caliber off-axis reflective collimator comprises a large-caliber off-axis reflective collimator assembly, a CCD camera, an image acquisition and processing assembly and a three-dimensional adjusting platform;
the large-caliber off-axis reflective collimator assembly, the CCD camera and the image acquisition and processing assembly are arranged on the three-dimensional adjusting platform;
the large-aperture off-axis reflective collimator component comprises a multispectral light source, a cross target, a spectroscope, a secondary reflector, a main reflector, an attenuation sheet and a plane reflector for auto-collimation;
the CCD camera is arranged on a CCD camera branch focal plane formed by the spectroscope in the large-caliber off-axis reflective collimator assembly, and the center of a sensitive surface of the CCD camera is aligned with a main optical axis of the CCD camera branch;
the multispectral light source is arranged in front of the cross target, the CCD camera is arranged beside the spectroscope, the main reflector is matched with the secondary reflector, and the auto-collimation plane reflector is arranged in front of the main reflector and is perpendicular to a main optical axis of the large-aperture off-axis reflection type collimator tube component.
2. The large-aperture off-axis reflective multi-optical-axis consistency quantitative test and calibration device according to claim 1, wherein: an attenuation sheet is arranged between the spectroscope and the CCD camera and used for attenuating the energy of pulse laser emitted by the laser range finder of the photoelectric device to be detected, so that the CCD camera is prevented from being damaged.
3. The large-aperture off-axis reflective multi-optical-axis consistency quantitative test and calibration device according to claim 2, wherein: the attenuation sheet is a combination of three attenuation sheets with different attenuation rates, wherein the OD of the attenuation sheet is 1.0, the OD of the attenuation sheet is 2.0 and the OD of the attenuation sheet is 3.0.
4. The large-aperture off-axis reflective multi-optical-axis consistency quantitative test and calibration device according to claim 1, wherein: the main reflecting mirror is a parabolic mirror, and the coefficient k of a quadric surface is-1; the secondary reflector is a hyperboloid mirror, and the coefficient k of the quadric surface is < -1.
5. The large-aperture off-axis reflective multi-optical-axis consistency quantitative test and calibration device according to claim 1, wherein: the plane reflector adopts K9 glass, silver-plated surface and dielectric protective film.
6. The large-aperture off-axis reflective multi-optical-axis consistency quantitative test and calibration device according to claim 1, wherein: a spectroscope is placed at 45 degrees to form a pair of conjugate focal planes, a cross target is placed on one focal plane, and a multispectral light source is used for irradiation to form a point light source; and a CCD camera is arranged on the other focal plane and is used for detecting the laser spot position of the measured photoelectric equipment arranged in front of the large-caliber off-axis reflective collimator assembly.
7. The large-aperture off-axis reflective multi-optical-axis consistency quantitative test and calibration device according to claim 1 or 6, wherein: the spectroscope is made of multispectral CVDZnS material.
8. The large-aperture off-axis reflective multi-optical-axis consistency quantitative test and calibration device according to claim 1, wherein: an off-axis reflection type long-focus optical system with the caliber of more than 250mm is adopted, and the working waveband is 0.5-12 mu m.
9. The large-aperture off-axis reflective multi-optical-axis consistency quantitative test and calibration device according to claim 1, wherein: the multispectral light source adopts a halogen lamp, and the working wave band is 0.5-12 μm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111272284A (en) * | 2020-03-11 | 2020-06-12 | 西安应用光学研究所 | Large-caliber laser polarization characteristic measuring instrument |
| CN111442910A (en) * | 2020-04-23 | 2020-07-24 | 中国科学院西安光学精密机械研究所 | High-precision multi-optical-axis consistency measurement system and method |
| CN116519136A (en) * | 2023-07-03 | 2023-08-01 | 中国科学院合肥物质科学研究院 | Same-optical-axis adjustment system and method for moon direct spectrum irradiance instrument |
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2019
- 2019-06-18 CN CN201920919232.5U patent/CN209927419U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111272284A (en) * | 2020-03-11 | 2020-06-12 | 西安应用光学研究所 | Large-caliber laser polarization characteristic measuring instrument |
| CN111442910A (en) * | 2020-04-23 | 2020-07-24 | 中国科学院西安光学精密机械研究所 | High-precision multi-optical-axis consistency measurement system and method |
| CN116519136A (en) * | 2023-07-03 | 2023-08-01 | 中国科学院合肥物质科学研究院 | Same-optical-axis adjustment system and method for moon direct spectrum irradiance instrument |
| CN116519136B (en) * | 2023-07-03 | 2023-09-08 | 中国科学院合肥物质科学研究院 | Same-optical-axis adjustment system and method for moon direct spectrum irradiance instrument |
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