Research Progress of Infrared Detector Dewar Vacuum Life

With the development of military,aerospace,aviation and other fields,infrared detectors are developing in the direction of ultra-large area arrays and ultra-long lines.The infrared detector packaging Dewar has put forward high re-liability,long life,and lightweight requirements.This article summarizes the progress of Dewar vacuum life at home and abroad.Some Dewar can achieve vacuum life of more than 10 years.The factors affecting the vacuum life of infrared detector Dewar are introduced,including Dewar leakage,Dewar material outgassing and gas leakage,etc.,summarized the relevant technology to reduce the influence of Dewar leakage and material outgassing and the means to improve the vacuum life of the Dewar.Finally,the related technologies that need to be studied under the development trend of infrared detector components are given.