中波红外光学系统无热化设计和冷反射抑制
发布时间：2018-09-11 16:45
【摘要】：为了得到性能好、稳定性高,能够满足民用、军事等领域应用的中波红外成像光学系统,采用光学被动式的无热化技术,在常温下像质良好的初始结构基础上,通过对不同红外材料组合,实现系统的无热化设计。利用等效温差(NITD)计算冷反射贡献量,对冷反射贡献量较大表面的曲率和光焦度进行优化。设计结果表明:在-40℃~60℃温度范围内,光学系统的MTF在30lp/mm处均大于0.5;离焦量在一倍焦深以内,点列图(RMS)直径小于像元尺寸;冷反射残存量最大的表面NITD值降低40%。应用该方法可以很好地实现红外成像光学系统的无热化设计,对冷反射的抑制效果明显。
[Abstract]:In order to obtain a medium wave infrared imaging optical system with good performance and high stability, which can be used in civil, military and other fields, an optical passive non-thermal technique is adopted, on the basis of a good initial structure with good image quality at room temperature. The non-thermal design of the system is realized by combining different infrared materials. The equivalent temperature difference (NITD) is used to calculate the cold reflection contribution, and the curvature and the light focus of the surface with large cold reflection contribution are optimized. The design results show that in the temperature range of -40 鈩，
本文编号：2237255
[Abstract]:In order to obtain a medium wave infrared imaging optical system with good performance and high stability, which can be used in civil, military and other fields, an optical passive non-thermal technique is adopted, on the basis of a good initial structure with good image quality at room temperature. The non-thermal design of the system is realized by combining different infrared materials. The equivalent temperature difference (NITD) is used to calculate the cold reflection contribution, and the curvature and the light focus of the surface with large cold reflection contribution are optimized. The design results show that in the temperature range of -40 鈩，
本文编号：2237255
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