光学 精密工程, 2009, 17 (11): 2712, 网络出版: 2010-08-31
“日盲”紫外ICCD的信噪比
SNR of solar blind ultraviolet ICCD
紫外ICCD 信噪比 光电冲激响应 ultraviolet Intensified Charge Coupled Device(ICCD Signal to Noise Ratio(SNR) photo-electronic pulse response
摘要
分析了“日盲”紫外增强型电荷耦合装置(SBUV-ICCD)噪声的来源及特点。考虑SBUV-ICCD工作时系统增益高,单光电子的响应会扩散到CCD邻近像素中去,故将SBUV-ICCD作为线性时不变系统,引入单光电子冲激响应到SBUV-ICCD信噪比计算中,利用傅里叶变换原理推导出其信噪比模型。模型采用了二维高斯函数拟合SBUV-ICCD单光电子冲激响应的方法,较传统间接分析的方法更为简单适用。分析了增益对SBUV-ICCD信噪比的影响,测量了辐照度在10.3~810.6 pW/cm2内变化时SBUV-ICCD的信噪比。实验结果表明,该模型的标准差为0.78,可用于SBUV-ICCD的性能分析。
Abstract
The noise source and characteristics of a Solar Blind Ultraviolet Intensified Charge Coupled Device (SBUV-ICCD) are analyzed. As the single P-E(photo-electronic) response can be diffused into neighboring pixels in CCD when the system gain is to be set a higher value in working conditions,this paper takes the SBUV-ICCD as a liner and shift invariant,and imports the P-E pulse response into the calculation of SNR,then the Fourier transform is used to deduced a SNR model. This model uses a 2D Gaussian function to fit the single P-E pulse response of the SBUV-ICCD,and it is simpler than those of traditional methods. The effect of the gain on the SNR of SBUV-ICCD is analyzed and the SNR of the SBUV-ICCD is measured when the irradiance is between 10.3 pW/cm2 and 810.6 pW/cm2.The results show that the RMS of the module is 0.78,which can be used in the analysis of performance of SBUV-ICCD.
周跃, 闫丰, 谷勇强, 邓博斯, 隋永新, 杨怀江. “日盲”紫外ICCD的信噪比[J]. 光学 精密工程, 2009, 17(11): 2712. ZHOU Yue, YAN Feng, GU Yong-qiang, DENG Bo-si, SUI Yong-xin, YANG Huai-jiang. SNR of solar blind ultraviolet ICCD[J]. Optics and Precision Engineering, 2009, 17(11): 2712.