中文摘要：

介绍了几种常见的无热化设计方法,并对衍射元件在无热化设计中的应用进行了重点分析。针对衍射元件在光学被动式消热差系统中的应用,设计了一种长波红外折衍混合消热差系统。设计的光学系统在-40℃~＋70℃范围内,实现了消热差和消色差,像质较好,而且结构简单、紧凑,实用性强。

英文摘要：

This paper introduces several athermalization elements in athermalization is the focus of the analysis. design methods, and the application of diffractive For the application of diffractive elements in the optical passive athermalization, the paper designs an athermalized infrared system in long-wave with refractive and diffractive elements. The optical system realizes athermalization and achromatism, which can work stably at the temperature range from--40~C to＋70~C. The image quality of the system is better, and the structure is simple, compact and practical.