The finite element model of the infrared lens was established by ANSYS,and the thermal stress was analyzed.The Zernike polynomial was used to fit the mirror surface after deformation,the effect of axial temperature gradient on optical performances of infrared lens was analyzed by exporting the Zernike coefficients to optical design software ZEMAX.The results show that the PV、RMS and the radius of curvature(ΔR)of lens increase with the increase of the axial temperature gradient.The axial temperature gradient leads to the deformation of the lens surface shape,so the optical performance of lens decreases.
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姬文晨,张宇,黄攀,贾钰超,李洪兵.轴向温度梯度对红外透镜光学性能的影响[J].激光与红外,2015,45(9):1100~1104 JI Wen-chen, ZHANG Yu, HUANG Pan, JIA Yu-chao, LI Hong-bing. Effect of axial temperaturegradient on optical performance of infrared lens[J]. LASER & INFRARED,2015,45(9):1100~1104