Seya-Namioka单色仪中光栅曲率半径误差的影响及补偿

孟竹; 谭鑫; 巴音贺希格; 王玮; 刘兆武; 赵旭龙

doi:10.3788/CO.20181104.0623

Volume 11 Issue 4

Jul. 2018

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Chinese Optics > 2018 > 11(4): 623-629.

MENG Zhu, TAN Xin, Bayanheshig, WANG Wei, LIU Zhao-wu, ZHAO Xu-long. Effect and compensate of grating curvature radius error in Seya-Namioka monochromator[J]. Chinese Optics, 2018, 11(4): 623-629. doi: 10.3788/CO.20181104.0623

Citation:

MENG Zhu, TAN Xin, Bayanheshig, WANG Wei, LIU Zhao-wu, ZHAO Xu-long. Effect and compensate of grating curvature radius error in Seya-Namioka monochromator[J]. Chinese Optics, 2018, 11(4): 623-629. doi: 10.3788/CO.20181104.0623

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Effect and compensate of grating curvature radius error in Seya-Namioka monochromator

doi: 10.3788/CO.20181104.0623

MENG Zhu^{1, 2
,},
TAN Xin^{1
,
,},
Bayanheshig¹,
WANG Wei^{1, 2},
LIU Zhao-wu^{1, 2},
ZHAO Xu-long^{1, 2}

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

Funds:

National major scientific instruments and equipment development projects 2011YQ120023

More Information

Corresponding author: TAN Xin, E-mail:xintan_grating@163.com
Received Date: 11 Mar 2018
Rev Recd Date: 13 May 2018
Publish Date: 01 Aug 2018

Abstract

Abstract

The curvature radius error in the Seya-Namioka grating process can cause defocus aberration, which may have a great impact on the spectral performance of the grating monochromator. Based on the theory of ray tracing, we simulate and analyze the impact of curvature radius error on Seya-Namioka grating. The analysis results show that the length of the entrance and exit arm has a good compensating effect on the curvature radius error. By adjusting the length of the entrance and exit arm, the allowable range of the curvature radius error can be increased to about 2 mm. If the total adjustment amount is not changed and the length of the access arm is arbitrarily changed, the compensation effect is similar. As the error increases, the length of the arm that needs to be adjusted becomes larger, and the excessive error makes the length of the arm unable to be compensated. In addition, changing the angle between the arm and the arm can only compensate for the error of the positive curvature radius. The adjustment angle needed for compensation is too large, which will affect the design structure of the monochromator, and it is not practical to compensate the curvature radius error by changing the angle of the entrance and exit arm. The research results in this paper show that by adjusting the parameters of the grating, the influence of errors can be reduced and the margin of error can be extended.
- curvature radius error,
- Seya-Namioka grating,
- ray-tracing,
- error compensation,

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References(17)

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