航空相机光学镜头被动消热一体化设计与验证分析

航空相机的使用环境温度变化范围较大，温度的变化会在相机光学镜头中产生温度梯度，影响相机成像质量。为保证相机光学系统的成像质量，需要对镜头在一定温度范围内进行消热设计。运用ZEMAX光学设计软件对某航空相机光学系统进行了热分析，并根据分析结果运用ANSYS软件实现了多片式、大视场角光学镜头被动式消热光机一体化设计，通过镜头内部补偿环节沿轴向的微位移改变镜间距，实现对光学系统不同温度下像质的补偿。同时，研制消热补偿试验件，采用一种高精度光学非接触式在线直接检测微位移的方法，精度达到±1 μm，完成了消热补偿试验件微位移测试。结果表明:不同温度下的微位移量与分析数据一致，最后通过对采用该消热一体化设计的实际航空镜头在不同温度下的像质检测，验证了该设计的有效性，镜头在各温况下性能良好。

Passive athermal integrated design and verification analysis for the optical lens of aerial camera

The temperature of aerial camera varies greatly in the working environment,and the temperature change will produce a temperature gradient in the optical lens of the camera,which will affect the image quality of the camera.In order to ensure the image quality of the optical system,the lens need to be designed for dissipate heat within a certain temperature range.The thermal analysis of an aviation camera optical system was accomplished by ZEMAX optical design software.According to the analysis results,the integrated opticalmechanical design of passive athermalization of multi-chip and large-field optical len was realized with ANSYS software.The image compensation at different temperature was achieved through micro-displacement variation between the compensation link inside the lens along the axial direction.At the same time,an optical non-contact online detection method was proposed with high precision,and the accuracy is±1μm.And then heat dissipation compensation test piece was developed to achieve micro displacement test,which showed the test data of micro displacement was consistent with the analysis data.Finally,the effectiveness of the design was verified by the image quality testing of the actual aerial lens with this integrated design,and the lens performs well at working temperature.