温度变化对透镜成像效果的影响称为热差。为了使透镜在一定温度范围内具有 稳定的成像质量, 通常需要通过采取某些补偿措施来实现消热差。归一化系数是消热差数学模型的重要组 成部分。讨论了归一化系数的概念及其在消热差技术中的应用情况。基于国内相关文献资料, 介绍了 红外光学系统消热差技术的发展思路与动态。

The influence of temperature variation on the imaging effectiveness of a lens is called thermal dispersion. To make a lens have stable imaging quality in a certain temperature range, usually some compensation measures for athermalization should be taken. Normalized coefficients are the important parts of an athermal mathematical model. The concepts of normalized coefficients and their application in athermal technologies are discussed. The development ideas and trends of athermal technologies for infrared optical systems are presented on the basis of the related papers published in China.