CAJ | 학술논문

从噪声来源出发，基于入射光子、暗电流、偏置信号的涨落均近似满足泊松分布的条件，得到了更为精准的信噪比表达式。实验设置CCD增益、读出速率、冷却温度分别为3、100kHz、?25°C，得出光子转移曲线。通过设置不同实验条件，分别探讨了暗电流、读出速率和系统增益对该科学级光学 CCD 信噪比的影响。实验结果与理论预期吻合得很好，为科学级光学条纹相机的设计以及弱光标定实验室自动化平台的搭建提供了良好的实验依据。
종조성래원출발，기우입사광자、암전류、편치신호적창락균근사만족박송분포적조건，득도료경위정준적신조비표체식。실험설치CCD증익、독출속솔、냉각온도분별위3、100kHz、?25°C，득출광자전이곡선。통과설치불동실험조건，분별탐토료암전류、독출속솔화계통증익대해과학급광학 CCD 신조비적영향。실험결과여이론예기문합득흔호，위과학급광학조문상궤적설계이급약광표정실험실자동화평태적탑건제공료량호적실험의거。
Based on the noise source, considering that the fluctuations of incident photons, dark current and biased signal satisfy the Poisson distribution, the corrected signal-to-noise-ratio (SNR) relation is obtained. On condition that the gain, readout rate and cooling temperature of CCD are set experimentally to be 3, 100kHz and?25°C respectively, the photon transfer curve is obtained. Meanwhile, by setting different experimental conditions,the effect of the dark current, readout rate and the system gain on the SNR of the scientific grade optical CCD is discussed respectively. The experimental results are in good agreement with the theory, which provides the good experimental basis for design of the scientific grade optical streak camera and building of the automated laboratory platform used for weak light calibration.