红外技术2026，Vol.48Issue(8)：926-934,9.
基于标量衍射理论的红外光学系统冷反射分析
Narcissus Analysis of Infrared Optical System Based on Scalar Diffraction Theory
摘要
Abstract
The narcissus effect is typically difficult to avoid when cooling infrared optical systems,but its influence can be reduced by increasing the complexity of the optical system.In this study,the scalar diffraction theory was applied to explore the formation principle of narcissus in an infrared optical system with a diffraction structure,and the difference between it and refraction narcissus was analyzed.When a beam passes through a diffraction structure,it changes under the action of multistage diffraction.Thus,such a diffraction structure was analyzed under the premise of considering the diffraction efficiency.The narcissus characteristics of the diffraction surface were evaluated using a paraxial ray-tracing technique.Furthermore,the effect of the diffraction structure on the optical properties was investigated using the design case of a long-wave infrared optical system that combines refraction and diffraction.Simultaneously,two diffractive surfaces were added to the system,and a cold diaphragm efficiency of 100%was achieved by using a secondary imaging scheme and setting the system aperture stop at the cold screen position.The reduction in the number of narcissus sites after adding a diffraction surface was analyzed.The results showed that adding a diffraction surface can reduce the narcissus and improve the imaging quality of the system.关键词
冷反射/光学设计/衍射光学/YNI/红外光学系统Key words
narcissus/optical design/diffractive optics/YNI/infrared optical systems分类
数理科学引用本文复制引用
董一优,薛常喜..基于标量衍射理论的红外光学系统冷反射分析[J].红外技术,2026,48(8):926-934,9.基金项目
吉林省自然科学基金(20220101124JC). （20220101124JC）
