林福跳, 刘朝晖. 中波红外折衍光学系统消热差设计与杂光分析[J]. 应用光学, 2010, 31(5): 833-837.
引用本文: 林福跳, 刘朝晖. 中波红外折衍光学系统消热差设计与杂光分析[J]. 应用光学, 2010, 31(5): 833-837.
LIN Fu-tiao, LIU Zhao-hui. MWIR refractive /diffractive hybrid athermal optical system and its stray light analysis[J]. Journal of Applied Optics, 2010, 31(5): 833-837.
Citation: LIN Fu-tiao, LIU Zhao-hui. MWIR refractive /diffractive hybrid athermal optical system and its stray light analysis[J]. Journal of Applied Optics, 2010, 31(5): 833-837.

中波红外折衍光学系统消热差设计与杂光分析

MWIR refractive /diffractive hybrid athermal optical system and its stray light analysis

  • 摘要: 论述了红外折衍混合消热差光学系统的设计原理与方法,利用衍射光学元件特性进行消热差与色差,设计出工作波段为3.5m~5.2m、F数为2、焦距为100mm、全视场角7,具有100%冷屏效率的折衍混合消热差光学系统。对系统进行杂光分析,理想成像光线的像面辐照度为1.5104W/m2,其他非成像光线的像面辐照度为2W/m2。该系统在-50℃~80℃的温度范围内成像质量接近衍射极限,适用于像元尺寸为30m、像元数320256的致冷型红外焦平面阵列探测器。

     

    Abstract: The concept and design of infrared hybrid diffractive/refractive athermalized optical system are described. A diffractive optical element is used to athermalize and achromatize the optical system. A hybrid optical system operating at 3.5m~5.2m wave band and the temperature range of -50~80℃ is designed. The system parameters include a focal length of 100mm, F/# 2, and FOV of 3.5, and it achieves 100% cold shield efficiency. The system stray light is analyzed, and the irradiances of the desired light and the stay light are 1.5104W/m2 and 2W/m2 respectively. The image quality achieved in the temperature range of -50℃~80℃ approaches the diffraction limitation. It is applicable to a cooled FPA detector with the format of 320256 and the pixel pitch of 30m.

     

/

返回文章
返回