Detection System for High-Resolution and Broadband-2D Spectrogram
WU Rui1, ZHANG Yin-xin1*, HUANG Zhan-hua1, YANG Huai-dong2, JIN Guo-fan2
1. Key Laboratory of Opto-Electronics Information Technology of the Ministry of Education, College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China 2. State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing 100084, China
Abstract：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 spectrogram. 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 S10141-1109S 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 experiments, 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.
Key words：Broadband spectrogram;High resolution;2D spectrogram;Detection system
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