中国科学院云南天文台机构知识库

基于天文红外探测器评价体系，利用改进的“光子转移曲线”测试方法，分别测试了液氮制冷和热电制冷的两款InGaAs近红外探测器的性能。NIRvana-LN光电子与输出数字量的转换因子为0.16ADU/e-，读出噪声实测值是83 e-，远高于标称值15 e-;NIRvana的高、低转换因子分别为1.25ADU/e-和0.097ADU/e-，读出噪声分别为105 e-和380 e-;NIRvana在高转换因子档下暗电流实测值是415 e-/s，大约是标称值的2倍。理论估算云南天文台两米环形望远镜在1.565μm太阳磁场测量时的信号电子数约8800 e-，在实测暗电流4.06 e-/s，像元曝光时间20 ms，读出噪声83.59 e-条件下，NIRvana-LN探测器信噪比为70。 

Based on the evaluation system of astronomical infrared detectors, the performance of two InGaAs NIR detectors, liquid nitrogen-cooled and thermoelectric-cooled, was tested using a modified "photon transfer curve" tests method. The measured value is 83 e-, which is much higher than the nominal value of 15 e-; the high and low conversion factors of NIRvana are 1. 25 ADU/e- and 0. 097 ADU/e-, respectively, and the readout noise is 105 e- and 380 e-; the measured value of dark current of NIRvana at the high conversion factor step is 415 e-/s, which is about twice of the nominal value. The theoretical estimate of the signal electron number of the Yunnan Observatory two-meter ring telescope at 1. 565 μm solar magnetic field measurement is about 8800 e-, and the NIRvana-LN detector signal-to-noise ratio is 70 under the measured dark current of 4. 06 e-/s, image exposure time of 20 ms, and readout noise of 83. 59 e-.