Overview of Micro-Rotary Stirling Cryocoolers for HOT IR detectors

With the improvement and promotion of the Mercury Cadmium Telluride (MCT) material preparation process, the dark current of the FPA is suppressed to a certain extent, and an increase in the operating temperature of IR detectors has become a development trend. The development of high-operating-temperature IR detectors promotes the development of micro-Stirling cryocoolers to reduce the size, weight, power consumption, and cost, and promote their performance. The SWaP3 design concept of Stirling cryocoolers for HOT IR detectors is presented. Design techniques such as thin-walled tube short cold fingers, high-efficiency small-size controllers, comprehensive thermal management, reliability prediction, and the recent domestic and foreign development status of Stirling cryocoolers for HOT IR detectors are summarized.