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设计了一种采用长波480×6阵列探测器的红外连续变焦光学系统.该系统利用机械补偿法变倍原理和非球面、衍射面进行像差平衡,工作波长范围为长波7.7~10.3μm,F数为2.62,变倍比达到15∶1.通过对连续变焦光学系统的传递函数、畸变、衍射元件、变焦曲线等性能的综合分析与评价,结果表明在变焦范围内下各个视场均可获得较好的光学性能,光学系统光路总长480mm、后截距为28mm、传递函数大于0.3、畸变小于5%.
An infrared continuous zoom optical system using a long wave 480 × 6 array detector was designed.The system compensated the aberration by using the principle of mechanical compensation and the aspheric surface and the diffractive surface.The working wavelength range is long wave 7.7 ~ 10.3μm, F The number is 2.62 and the zooming ratio is 15: 1.According to the comprehensive analysis and evaluation of the performance of continuous zoom optical system such as transfer function, distortion, diffraction element and zoom curve, the results show that each field of view can be obtained in the zoom range Better optical performance, optical system total length of 480mm optical path, after the intercept of 28mm, the transfer function is greater than 0.3, the distortion is less than 5%.