光电工程, 2019, 46 (4): 180462, 网络出版: 2019-05-04  

一种30倍连续变焦电视光学系统装调技术研究

Research on a 30 times ratio continuous zoom television optical system adjustment technology
作者单位
西安应用光学研究所, 陕西西安 710065
摘要
针对 30倍连续变焦电视公差灵敏度高, 装调难度大的问题, 运用光学仿真方法分析各分离透镜偏心对光学系统 MTF的影响。结果显示, 前组镜中心偏差对系统像质影响敏感, 会产生非对称像差。本文优选光机界面的结构形式, 使透镜下表面自动定心, 微调上表面将偏心控制在公差范围内。变倍组、补偿组作为运动组件, 在变焦过程中光轴共轴性也是影响系统像质的关键因素。本文采用机械定心工装使运动组件的中心轴线与导杆轴线平行, 再以前组镜透射光轴为基准, 校正所有光学部件光轴与之共轴。光学系统经过精密装调, 小视场像质分辨率达到 2.43″, 接近衍射分辨率极限。
Abstract
Aiming at the problem of high tolerance sensitivity and difficult adjustment of 30 times continuous zoom TV,the effects of eccentricity on the MTF (modulation transfer function) of the optical system were analyzed by opticalsoftware. The results show that the central error of the front mirror group is sensitive to the asymmetric aberration. Inthis paper, the structural form of the spacer ring machine program is optimized, so that the lower surface of the lensis automatically centering. As the moving component of the system, both zoom lens group and compensation lensgroup are the key factors affecting the system image quality during the zooming process. In this paper, mechanicalcentering tooling is used to make the central axis of the moving assembly parallel to the axis of the guide rod. Theoptical axis of all components is corrected by the optical axis of the front mirror group. The optical system is preciselyadjusted, and the optical resolution of the small field of view reaches 2.43″, which is close to the limit of diffractionresolution.

张向明, 王中强, 昌明, 李玉喜, 姜峰, 王章利, 马力, 赵玮. 一种30倍连续变焦电视光学系统装调技术研究[J]. 光电工程, 2019, 46(4): 180462. 张向明, 王中强, 昌明, 李玉喜, 姜峰, 王章利, 马力, 赵玮. Research on a 30 times ratio continuous zoom television optical system adjustment technology[J]. Opto-Electronic Engineering, 2019, 46(4): 180462.

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