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6 July 2018 Near infrared sky brightness measurement using an InGaAs detector
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Abstract
Tibet is known as the third pole of the earth. The Ngari (Ali) observatory in Tibet is a good site, and promising to be one of the best place for infrared and submillimeter observations in the world. However, there is no data available for sky background brightness in such place. In the near infrared band of J, H, Ks, a NIR sky brightness monitor (NISBM) is designed based on InGaAs photoelectric diode. By using the method of chopper modulation and digital lock-in amplifier processing, the SNR (Signal Noise Ratio), detectivity and the data acquisition speed of the device is greatly improved. The NISBM has been installed in Ngari observatory in July of 2017 and obtained the first data of NIR sky brightness at Ngari observatory.
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yi-hao Zhang, Qi-Jie Tang, Shu-cheng Dong, Jin-ting Chen, Feng-xin Jiang, Zhi-yue Wang, Ya-qi Chen, Ming-hao Jia, Jie Chen, Hong-fei Zhang, Qing-feng Zhu, Peng Jiang, Tuo Ji, Shao-hua Zhang, Yong-qiang Yao, Yun-he Zhou, Hong-shuai Wang, Peng Tang, and Jian Wang "Near infrared sky brightness measurement using an InGaAs detector", Proc. SPIE 10700, Ground-based and Airborne Telescopes VII, 1070051 (6 July 2018); https://doi.org/10.1117/12.2311993
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