电荷耦合器件CCD已经成为天文学中经常使用的光学探测器,它对光子有很好的线性响应,在某些波长范围内非常有效.但是随着波长的减小,其探测效率越来越低,并且缺少本征频率和时间分辨率.在半导体CCD探测器中,光子的能量和激发态能量相当,因此不可能探测单个光子,也得不到光谱信息. CCD has become a commonly used optical detector in astronomy, which has a good linear response to photons and is very effective in some wavelength ranges.However, as the wavelength decreases, its detection efficiency is getting lower and lower, And the lack of eigenfrequency and temporal resolution.In the semiconductor CCD detector, the photon energy and excited state energy equivalent, it is impossible to detect a single photon, also can not get the spectral information.