The assembly positioning state of the imaging detector has an important influence on the performance of the photoelectric reconnaissance system. The axial positioning accuracy of the imaging detector will affect the imaging clarity and resolution, and the radial positioning accuracy will affect the optical axis consistency of the optical path system. The tilt, translation, rotation and position of the detector will bring multi-dimensional errors during the installation of the imaging detector, resulting in image plane misalignment, image blur and optical axis offset. In this paper, an optical measurement system is designed and built, which can automatically distinguish the installation error of the imaging detector and assist the installation of the imaging detector. The translation installation error is less than 0.015mm, and the rotation deflection error is less than 0.015 ', and the installation qualification can be given according to the clarity of the observation system image.
It was an effective way to keep the pivotal element of the lens under a specific temperature in order to increase the detection sensitivity, so that the thermocurrent caused by thermal radiation of the lens itself could be control under a lower level, But it was difficult to decide which element was the correct one and what was the temperature should be kept. To solve this problem, we, We used LightTools to simulate the cold optical lens deign and established a calculation and analysis method. which can be applied to the analysis of most infrared systems and has universal applicability.
KEYWORDS: Zoom lenses, Mirrors, Modulation transfer functions, Diffraction, Objectives, Lenses, Imaging systems, Error control coding, Calibration, Control systems
In order to meet the requirements of high imaging quality and high resolution for high magnification continuous zoom TV, the main factors affecting the imaging quality are analyzed. The effects of eccentricity on the MTF of the optical system were analyzed by CODE V optical software. According to the analysis results, the lenses of the former group are most sensitive to the optical system and have the greatest influence on the image quality of the system. The tolerance value of the center deviation control of the lens is determined. Aiming at each lens of the front mirror group, a centering structure of the micro stress adhesive lens is proposed. The center error control method of lens is realized by optical axis calibration technology. As the moving component of the system, the zoom lens group and the compensation lens group are the key factors affecting the system image quality during the zooming process. It is proposed that the mechanical centering method is used to make the axis of motion consistent with the axis of the front mirror group. Then, The optical axes of the zoom group, compensation mirror group, rear mirror group, and front mirror group are consistent by a reflective optical centering method. By comparing the test results with the theory, the accuracy and feasibility of the center deviation control method are verified, and the design requirements of the system are satisfied.
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