Temperature control and vibration measurement of a MCT camera using a tube cyrocooler

Jiang-yuan Wei; Wen-qing Qu; Feng Zeng; Hao-ran Ma; Yu Ning; Hong-fei Zhang; Jian Wang

doi:10.1117/12.3016386

26 August 2024 Temperature control and vibration measurement of a MCT camera using a tube cyrocooler

Jiang-yuan Wei, Wen-qing Qu, Feng Zeng, Hao-ran Ma, Yu Ning, Hong-fei Zhang, Jian Wang

Proceedings Volume 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI; 1310075 (2024) https://doi.org/10.1117/12.3016386
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

In order to enhance the observational ability in infrared wavelength, a K-band MCT(Hg-Cd-Te) mosaic camera is constructed for a near-infrared telescope. In this paper methods of low temperature control and vibration measurement of the infrared camera are introduced. In order to suppress the dark current of the MCT detector of the camera, the detector is refrigerated to below 80K using a tube cryocooler in a vacuum chamber. To suppress the scatter light from lens of optics, the lens in front of the detectors should be cooled to below 150K. And in order to avoid damage of the cold optical lens caused by low temperature, two-stage temperature control is carried out on the base-plate of detectors and cold optics. Furthermore, the running cryocooler will cause small vibration of the detector, which will reduce the imaging quality of the camera. An anti-vibration method is designed to reduce the influence of the vibration. A three-axis vibration measurement of the detector is introduced, which provides data basis for the analysis of the influence of vibration on imaging and image correction.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Jiang-yuan Wei, Wen-qing Qu, Feng Zeng, Hao-ran Ma, Yu Ning, Hong-fei Zhang, and Jian Wang "Temperature control and vibration measurement of a MCT camera using a tube cyrocooler", Proc. SPIE 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI, 1310075 (26 August 2024); https://doi.org/10.1117/12.3016386

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