摘要
对含有一个用金刚石车削技术制作的衍射光学元件(DOE)的折/衍混合长波红外(LWIR)凝视成像系统进行了杂散光分析。利用Light Tools软件对DOE的不同衍射级次、光学表面多次反射、镜筒内壁反射等主要杂散光源进行了模拟和分析,对6种二次反射的模拟结果表明,对归一化的光源,理想光路的像面辐照度为100W/mm2,每种二次反射会给像面带来0.01W/mm2的辐照度;反射率为10%的镜筒内壁给像面带来的辐照度为0.01W/mm2。利用该LWIR凝视成像光学系统进行了相关实验,实验结果证明了上述分析的正确性,表明该项分析有利于对LWIR凝视成像系统光学性能的进一步理解和杂散光的抑制。
The stray light of a diffractive/refractive Long Wavelength Infrared（LWIR） staring imaging system containing a Diffractive Optical Element （DOE） fabricated by the diamond turning technology was analyzed. Three kinds of sources of the stray light, the unwanted diffractive order light of DOE, the multiple reflected light of optical surface, and the reflected light from the inner side of a barrel, were simulated and analyzed with the help of Light Tools software. From the simulation results of 6 twice-reflections, it is shown that when the source is normalized, the idea path and the twice-reflection offer their irradiances to be 100 W/mm^2 and 0. 01 W/nm^2 in the image plane, respectively, and the inner side of the barrel with 10% reflection also results in an irradiance of 0. 01 W/mm^2 at the image plane. The analyzed result is approved by the image gotten from the LWIR system, which indicates the analysis is a contribution to understand the optical properties and to restrain the stray light of the imaging system.
出处
《中国光学与应用光学》
2009年第5期402-407,共6页
Chinese Optics and Applied Optics Abstracts
基金
国家自然科学基金(10704072)
中国科学院知识创新工程领域前沿项目资助
关键词
红外成像系统
长波红外
折衍混合光学系统
衍射光学元件
杂散光
infrared imaging system
Long Wavelength Infrared（LWIR）
Diffractive Optical Element（DOE）
stray light
