大视场高分辨率深海探测变焦光学系统设计  

Design of Zoom Optical System for Deep-Sea Detection with Large Field of View and High Resolution

作　　者：王雪峰 颜昌翔[1] 王晓东[1] 顾志远[1] Wang Xuefeng;Yan Changxiang;Wang Xiaodong;Gu Zhiyuan(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,Jinlin,China;Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《激光与光电子学进展》2023年第7期58-64,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金青年基金(61805235);2019-长光复旦-纳米表面结构窄带滤波片及光谱成像上的应用研究(Y9R633A190)。

摘　　要：为满足深海探测需求,实现深海中更高质量成像,设计了深海专用的连续变焦光学系统,该系统同时具备短焦大视场、高分辨率、高变倍比的特点。根据在深海中使用环境,考虑了深水压对光学窗口挤压变形造成的像质下降,对光学窗口进行光机集成分析,将面形变化结果以Zernike多项式的形式代入光学系统中进行优化。对水下光学像差特点和变焦系统的设计方法进行研究后,光学系统采用机械式负组补偿变焦方式和像方远心设计方案。该系统工作距为5 m,变焦全程F数恒定为3.0,可实现全视场角5.7°~90°范围内可调,10倍连续光学变焦。变焦系统使用三片非球面,系统总长为260 mm。在208 lp/mm处,整个变焦区域内全视场的调制传递函数值均大于0.3,另外系统各变焦位置的最大畸变均小于3%。所提变焦系统结构紧凑,成像质量良好,变焦曲线平滑,可以满足实际应用的需要。A continuous zoom optical system for underwater that has the characteristics of a large field of view,high resolution,and high zoom ratio at the same time is designed to satisfy the needs of deep-sea exploration and achieve higher quality optical imaging in the deep sea.According to the operating deep sea environment,the image quality degradation caused by the extrusion deformation of the optical window caused by deep water pressure was considered,an integrated optomechanical analysis of the optical window was carried out,and the surface shape change results were substituted into the optical system in the form of a Zernike polynomial for optimization.After studying the characteristics of underwater optical aberration and the design method of zoom system,the optical system adopts the mechanical negative group compensation zoom method and image square telecentric design scheme.The system’s working distance is 5 m,the Fnumber of the whole zoom is constant 3.0,and the system can achieve the full field of view of 5.7°‒90°,10 times continuous zoom.The zoom system uses three aspheric surfaces with a total length of 260 mm.At 208 lp/mm,the maximum distortion of each zoom position of the system is<3%and the modulation transfer function values of the entire field of view in the whole zoom area are>0.3.The zoom system features a compact structure,good imaging quality,and a smooth zoom curve,which can accommodate real application demands.

关 键 词：海洋光学 光学设计 光机集成分析 高分辨率 高变倍比 大视场 

分 类 号：O436[机械工程—光学工程]