Photoelectric platform sight line stabilization error tester
A photoelectric platform and tester technology, which is applied in the direction of testing optical performance, etc., can solve the problems of low measurement accuracy and small measurement range
Inactive Publication Date: 2011-01-12
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
[0012] In order to solve the shortcomings of low measurement accuracy and small measurement range in the photoelectric platform visual axis stability error measurement technology in the background technology, the present invention designs a new type of photoelectric platform visual axis stability error tester
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[0057] 1. Optical-mechanical structure design of the boresight stability tester
[0058] The basic parameter of the optical design of the boresight stability tester is the field of view angle of 2° (diagonal line), and the accuracy of angle measurement is better than 2". Due to the longer focal length of the optical structure; the relative aperture is larger; and it is self-collimating For imaging, the pinhole image falling on the CCD image plane passes through the optical system twice. Therefore, the image quality of the optical system is required to be high, and the off-axis aberration and the secondary spectrum must be corrected, so the positive group and the negative group are separated. Group form, the positive group uses two FKB 2B (Special Dispersion) Glass corrects secondary spectra. figure 2 is the calculated MTF value of the optical structure of the autocollimator, at 42lp / mm, MTF=0.7, and the optical design quality is excellent.
[0059] In order to ensure that t...
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The invention relates to a photoelectric platform sight line stabilization error tester which belongs to an optical structural design and image processing technology. The photoelectric platform sight line stabilization error tester comprises an optical system and an image processing system. The tester is mainly characterized in that a high-speed digital CMOS (Complementary Metal-Oxide-Semiconductor Transistor) detector is used for replacing a traditional visual reticle or a PSD (Phase-Sensitive Detector) detector, thus the view field is increased by 51.2 times; and the frame frequency of the high-speed digital CMOST detector is 200fps, and compared with a traditional detector with the frame frequency of 30fps, the time sampling interval between two adjacent images is shortened, and the space sampling density of a reflecting mirror is improved, thus the tester is beneficial to improving the dynamic position measuring precision of the reflecting mirror. A light spot image subpixel motion detection technology, i.e. a subpixel registration technology based on phase correlation is adopted to improve the image resolution to 1 / 15 pixel, therefore, the purposes of wider view field angle and high resolution of an optical system are achieved, wherein the view field angle of the tester is 2 degrees (diagonal line), and the angle testing precision is 1.2 seconds.
Description
Technical field: [0001] The invention relates to optics, structural design and image processing technology of a photoelectric platform visual axis stability error tester. A high-speed CMOS digital camera is used as a detector and image processing technology is applied to design and manufacture a photoelectric platform visual axis stability error tester. instrument. Background technique: [0002] The photoelectric platform installed on the aircraft, ship or ground vehicle is affected by the swing and vibration of the base to varying degrees, which causes the visual axis of the optical system on the photoelectric platform to shake, blurs the image of the optical system, and reduces the detection and recognition distance of the optical system. . Engineers use vibration reduction and servo control technology to offset the impact of the base's swing and vibration. In theory, the servo stabilization system can keep the optoelectronic platform "stable" relative to the inertial spa...
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Inventor 郎小龙孙辉孙俊喜
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI