Design of a 1x3 mosaic infrared camera in the K-band based on HgCdTe detectors

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

doi:10.1117/12.3017295

18 July 2024 Design of a 1x3 mosaic infrared camera in the K-band based on HgCdTe detectors

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

Proceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 1309682 (2024) https://doi.org/10.1117/12.3017295
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

Chinese scientists plan to build an 80 centimeter caliber near-infrared astronomical telescope in Antarctica, consisting of one telescope and two terminal devices. The K-band astronomical imaging system is one of the main terminals. We designed and characterized a 1x3 K-band near-infrared mosaic camera and the MCT detectors form Shanghai Institute of Technical Physics. The single pixel array of this camera is 640x512, with a single pixel size of 15 μm. Three detectors arranged in a mosaic configuration generated a focal plane pixel array of 1920x512. To ensure the optimal performance of the K-band astronomical imaging system, we used Dewar sealing, vacuum maintenance, and thermoacoustic refrigerator to cool the detector to 80K and the optical lens and components to 150K. In addition, a low-noise power supply design and electronic devices with low readout noise are adopted to ensure the minimum dark current and low readout noise of the mosaic infrared camera. The flatness of the mosaic detector is less than 20 μm . Complies with the design specifications for K-band astronomical imaging system.

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

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Wen-qing Qu, Jiang-yuan Wei, Hao-ran Ma, Yu Ning, Zhe Geng, Yu Zhang, Feng Zeng, Hong-fei Zhang, and Jian Wang "Design of a 1x3 mosaic infrared camera in the K-band based on HgCdTe detectors", Proc. SPIE 13096, Ground-based and Airborne Instrumentation for Astronomy X, 1309682 (18 July 2024); https://doi.org/10.1117/12.3017295

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