Vacuum dewar subassembly having external getter and infrared refrigeration detector

• Main Authors: WANG LIBAO, LIU DAOJIN, SHEN XING
• Format: Patent
• Language: Chinese; English
• Published: 12.11.2019
• Subjects: COLORIMETRY; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; PHYSICS; RADIATION PYROMETRY; TESTING

The invention belongs to the technical field of infrared refrigeration, and particularly provides a vacuum dewar subassembly having an external getter, and an infrared refrigeration detector. The vacuum dewar subassembly comprises a dewar bottle body and a closed external cavity; the dewar bottle body comprises a shell and a sealed cold finger; a sealed chamber is formed between the shell and thesealed cold finger; the closed external cavity and the shell are hermetically connected; one end of the closed external cavity communicates with the sealed cavity; and the vacuum getter is disposed inthe closed external cavity. On one hand, the getter is disposed externally to reduce heat transferred to a chip when the getter is activated, and the getter is guaranteed to be fully and continuouslyactivated so as to improve the gettering performance of the getter; on the other hand, the getter is externally disposed and meanwhile the volume of the chamber inside the vacuum dewar subassembly isreduced, the area of the ve