Research on performances of back-illuminated scientific CMOS for astronomical observations

作     者：Peng Qiu Yong Zhao Jie Zheng Jian-Feng Wang Xiao-Jun Jiang Peng Qiu;Yong Zhao;Jie Zheng;Jian-Feng Wang;Xiao-Jun Jiang

作者机构：CAS Key Laboratory of Optical AstronomyNational Astronomical ObservatoriesChinese Academy of ScienceBeijing 100101China School of Astronomy and Space ScienceUniversity of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2021年第21卷第10期

页      面：268-278页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.U1831209 11803017 and 11903053) 

主　　题：detectors photometric observational 

摘      要：To evaluate performances of a back-illuminated scientific CMOS(sCMOS)camera for astronomical observations,comparison tests between Andor Marana s CMOS and Andor iKon-L 936 CCD cameras were conducted in a laboratory and on a *** laboratory tests showed that the readout noise of the sCMOS camera is about half lower,the dark current is about 17 times higher,the dynamic range is lower in the 12-bit setting and higher in the 16-bit setting,and the linearity and bias stability are comparable relative to those of the CCD *** field tests,we observed the open cluster M67 with the sCMOS and CCD cameras on a 60 cm *** the CCD camera,the sCMOS camera has a dual-amplifier *** a 16-bit image of the sCMOS camera is composed of two 12-bit images sampled with 12-bit high gain and low gain amplifiers simultaneously,it is not real 16-bit output *** evaluation tests indicated that the dual-amplifier architecture of the s CMOS camera leads to a decline of photometric stability by about six times around specific pixel *** photometry of bright objects with similar magnitudes that require high frame rates,the s CMOS camera under 12-bit setting is a good ***,the sCMOS camera is fitted with survey observations of variable objects requiring short exposure times,mostly less than 1 s,and high frame *** also satisfies the requirements for an offset guiding instrument owing to its high sensitivity,high temporal resolution and high stability.