检焦镜面型精度对航空相机自准直检焦位置的影响

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关键词：航空相机；自准直；检焦；曲线拟合；面型误差

中图分类号：V243.5 文献标识码：A

doi：10.37188/OPE.20253316.2516 CSTR：32169.14.OPE.20253316.2516

Impact of collimating mirror surface accuracy on focusing position in aviation cameras

ZHANG Junda，DING Yalin*， SUN Lin*，CHEN Zhichao， ZHANG Mingqiang，YUWEN Ziming，LI Ruchen

（State Key Laboratory of Dynamic Optical Imaging and Measurement，Changchun Institute of Optics， Fine Mechanics and Physics，Chinese Academy ofSciences，Changchun l3Oo33，China） * Corresponding author，E-mail： dingyl1964@sohu. com;sunlin@ciomp. ac. cn

Abstract： For the issue offocus failure caused by changes in the shape of the focusing miror during the au tocollmation focusing process of aerial cameras，a corresponding theoretical model was provided.By est tablishing the relationship between the diference in light intensity received by the sensor and the focusing curve，the impact of diffrent focusing mirror shape accuracies on the distribution of imaging light intensity was calculated，and the effects of various aberrations on the focusing curve were analyzed.Combined with an actual camera model， simulations were conducted using Zemax software in non-sequential mode. By adjusting the temperature to control the shape of the focusing miror，focusing experiments were carried out under different shapes，verifying the theoretical and simulation results. The results show that when the surface shape RMS of the focusing mirror reaches 0.048 3λ ， the peak position of the focusing curve exceedsthe half focal depth；whenthe surfaceshapeRMS reaches 0.0821λ ，the focusing curve exhibits multiple peaks. This has guiding significance for the error allocation，design，and control of the optical auto collmation focusing mirror， as well as for improving the imaging quality of aerial cameras.

Key words ： aerial camera; autocollimation； focus inspection; curve fiting； surface figure error

1引言

航空遥感是获取地面信息的重要手段之一，具有成像分辨率高、实时性强、成像直观、灵活快速等优势[1-4]。（剩余16075字）