Support technique of HgCdTe focal plane arrays based on fiberglass bundle used in infrared space camera

摘要

HgCdTe focal plane array detector is a key component in infrared space camera. The scale of detector is enlarging continuously due to the unending requirements of better performance. HgCdTe plane array detector needs to work at deep cooling environment and it is encapsulated in dewar package. Support structure is used to support HgCdTe plane array detector in dewar. About 200K difference in temperature exits between the detector and the wall of dewar. In addition to certain support performance, the support structure should possess high adiabatic performance. Contradiction between support performance and adiabatic performance exists in the support structure of HgCdTe plane array detector, and it is intensified due to the scale enlarging of the detector. Then support technique of HgCdTe focal plane arrays based on fiberglass bundle is proposed. Adopting fiberglass bundle, the support performance of support structure is enhanced, but the adiabatic performance of support structure is not reduced obviously. The contradiction between support performance and adiabatic performance according to the support structure is resolved completely. At the end, assembly process of fiberglass bundle in support structure is introduced.