狭缝高度对单色仪光谱分辨率的影响

张靖; 张博; 刘凯; 王楷炀; 冯树龙; 李文昊; 姚雪峰

doi:10.37188/CO.2023-0004

Volume 16 Issue 6

Nov. 2023

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Chinese Optics > 2023 > 16(6): 1442-1449.

ZHANG Jing, ZHANG Bo, LIU Kai, WANG Kai-yang, FENG Shu-long, LI Wen-hao, YAO Xue-feng. Effect of slit height on the spectral resolution of a monochromator[J]. Chinese Optics, 2023, 16(6): 1442-1449. doi: 10.37188/CO.2023-0004

Citation:

ZHANG Jing, ZHANG Bo, LIU Kai, WANG Kai-yang, FENG Shu-long, LI Wen-hao, YAO Xue-feng. Effect of slit height on the spectral resolution of a monochromator[J]. Chinese Optics, 2023, 16(6): 1442-1449. doi: 10.37188/CO.2023-0004

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Effect of slit height on the spectral resolution of a monochromator

doi: 10.37188/CO.2023-0004

ZHANG Jing^{1, 2
,},
ZHANG Bo¹,
LIU Kai³,
WANG Kai-yang^{1, 2},
FENG Shu-long¹,
LI Wen-hao¹,
YAO Xue-feng^{1
,
,}

1.
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
Changchun Optical Machinery Technology Development Co., Ltd., Changchun 130033, China

Funds: Supported by Jilin Provincial Science and Technology Development Plan (No. 202103053SF)

More Information

Corresponding author: yaoxf@ciomp.ac.cn
Received Date: 03 Jan 2023
Rev Recd Date: 05 Feb 2023

Available Online: 18 Apr 2023

Abstract

Abstract

Monochromators are widely used in spectral calibration, material analysis and other aspects, so research of high spectral resolution monochromator systems is of great significance. Based on the vector grating equation, the influence of the height of the incident slit on the spectral line bending of a spectrometer is investigated, and the analytical expressions of the spectral line bending at the same wavelength and the slit height are given. An optimization scheme of the spectral resolution of the monochromator based on the suppression of spectral line bending by the slit height is proposed. According to the performance index requirements of a highly sensitive and ultra-fast time response detector, a three-grating monochromator optical system with a spectral resolution of 0.1 nm and a band range of 185−900 nm was designed, and a prototype was built to verify the influence of the slit height on spectral line bending, and to explore the influence of slit height on spectral resolution on the above basis. The experimental results show that the spectral resolution can be improved from 0.32 nm to 0.1 nm by optimizing the slit height when the slit width is fixed.
- monochromator,
- spectral line bending,
- slit height,
- spectral resolution

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References(23)

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