基于MTF的红外镜头无热化性能评估方法研究

红外镜头因受温度影响较大,需进行无热化设计,而目前国内外针对红外镜头的无热化评估方法的研究并不多.提出在现有传递函数仪的基础上,采用光学检测的方法对红外镜头在不同温度下的MTF值进行检测,得到其不同温度下焦点位置偏移量.针对其关键的中继镜头的设计,分析了三种可能的设计方法,最终选定了最可行的设计方案.通过对某一标准镜头的测试也验证了方案的可行性.

Research on Performance Evaluation Method of the Infrared Lens Based on MTF

Because Infrared lens are greatly influenced by temperature,the athermal design is necessary. But the assess-ment of athermal compensation are rare. This paper proposed an method for assessment of athermal compensation which adapt the Optical detection method based on the exiting equipment of the MTF measurement. By changing the ambient temperature, we can get the difference MTF.As for the design of relay lens , we selected the most feasible design scheme after analyzing the three possible design scheme. At last, the performance of the standard lens were tested and the feasibility of the project was proved through experiment .