三分离式消热差制冷型中红外物镜的设计

发布时间：2018-05-04 19:26

  本文选题：光学设计 + 消热差　； 参考：《红外与激光工程》2016年04期

【摘要】：为了满足多种复杂环境的使用需求,红外光学系统需要适应较大的工作温度范围。介绍了一种三分离式消色差消热差制冷型中红外物镜的设计方法。改进了三分离式结构物镜的孔径光阑位置,使物镜实现100%冷光阑效率,同时将这种结构与消热差模型相结合,推导出三分离式消热差物镜的初始光焦度分配关系,并给出透镜材料的组合原则。利用该方法设计了工作波段为3~5μm,焦距为88 mm,相对孔径为1:2的红外物镜,各视场弥散斑半径均小于5μm,调制传递函数MTF达到0.75@17 lp/mm,获得了很好的成像质量。该物镜在-20℃~+70℃温度范围内保持焦距、像面和像质很好的稳定,验证了三分离式消热差光学系统的设计方法。
[Abstract]:In order to meet the needs of various complex environments, infrared optical systems need to adapt to a large operating temperature range. This paper introduces a design method of three separate achromatic heat-dissipation cooling mid-infrared objective lens. The aperture position of the three-separated objective lens is improved to realize the efficiency of 100% cold aperture. At the same time, the initial focal distribution relationship of the three-separated objective lens is deduced by combining the structure with the heat dissipation model. The combination principle of lens material is also given. Using this method, an infrared objective lens with a working band of 3 渭 m, focal length of 88 mm and a relative aperture of 1:2 is designed. The radius of dispersion spot in each field of view is less than 5 渭 m, and the modulation transfer function (MTF) is up to 0.7514lp / mm. The good imaging quality is obtained. The objective lens keeps focal length in the temperature range of -20 鈩，

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