With the development of Infrared Sound from single colour and channel to multicolours and channels,from element to line array and plane array,especially with the invention of FPA (Focal Plance Array) Infrared Device,the technology of Infrared has been improved significantly.Shell Assembly and Dewar Assembly are the main types of Infrared Sound Assembly,during which Dewar is more popular in cryogenic applications.In the technique of Dewar Assembly,the art of FPA assembly is the one of the most important key ...