宽光谱高分辨率二维光谱信号探测系统设计

Detection System for High-Resolution and Broadband-2D Spectrogram

针对宽光谱范围高分辨率的中阶梯光栅-棱镜交叉色散光路对二维光谱的探测需求,分析了探测器与光路系统的匹配关系,提出了面阵光谱探测系统的设计方法,设计了具有高灵敏度、低噪声等特点的二维光谱探测系统。该系统包括主控单元、探测器驱动单元、信号处理单元、数据存储单元以及数据传输单元等主要模块。以滨松S10141型CCD为核心设计的探测系统灵敏度高、动态范围大、信噪比高。结合中阶梯光栅-棱镜交叉色散光路进行光谱探测实验,结果表明,该探测系统能在200~600nm宽光谱范围内获得高分辨率二维光谱图像,在Hg灯253.652nm处单色像斑覆盖5个像素,分辨率达到6.3pm。

In order to meet the demand of detecting the high-resolution and broadband-2D spectrogram for echelle-prism cross- dispersion, the design method is given, and the 2D spectrogram detection system with high-resolution and low noise is designed by analyzing the relation between the detector and the optical system and proving designing method of detecting the area spectro- gram. The system includes a main control unit, a detector driving unit, a signal processing unit, a data storage unit and a data transmission unit, etc. With Hamamatsu^s $10141-1109S CCD as the detector, the detection system features high sensitivity, broadband spectrogram, high signal to noise ratio. Combined with the echelle-prism cross-dispersion optical path to perform ex- periments, the results show that, the detection system can acquire high-resolution 2D spectrogram image in the range of 200 to 600 nm, the monochromatic image at 253. 652 nm of Hg lamp covers 5 pixels, and the resolvable wavelength reaches 6.3 pm.