Grating rotation method and device for improving wavelength accuracy of spectrograph
A technology of a rotating device and a spectrograph, which is applied in the field of optics and can solve the problems of inaccurate wavelength accuracy and spectral information results.
Active Publication Date: 2020-04-14
ZOLIX INSTR
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[0003] This application provides a grating rotation method and device for improving the wavelength accuracy of the spectrograph, at least to solve the existing grating rotation scheme in the prior art due to the problem of the wavelength accuracy of the grating scanning spectrograph. The problem of inaccurate spectral information results
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[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0045] There are currently several types of spectrographs (spectrometers) on the market:
[0046] 1. The spectrograph is a spectrometer that disperses the composite light into a spectral band through a grating and projects it onto the array detector. The array detector can detect spectral information of a certain wavelength width at one time, and the wavelength range is fixed.
[0047] 2. The grating scanning slit spectrometer is a spectrometer that disperses ...
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The invention provides a grating rotation method and device for improving wavelength accuracy of a spectrograph. The grating rotation method comprises the following steps: acquiring an initial wavelength and an end wavelength of a scanning range; determining a starting angle and an ending angle of grating rotation according to a preset grating rotation angle series value, the starting wavelength and the end wavelength; and rotating the grating according to the starting angle and the ending angle to obtain required spectral information. The wavelength corresponding to the starting angle is smaller than the initial wavelength, and the wavelength corresponding to the ending angle is larger than the end wavelength. According to the grating rotation scheme provided by the invention, the problemof inconsistent accuracy of the obtained spectrum due to different grating rotation angles can be solved.
Description
technical field [0001] The application belongs to the field of optical technology, and in particular, relates to a grating rotation method, device and device for improving the wavelength accuracy of a spectrograph. Background technique [0002] The grating scanning spectrograph disperses the composite light into a spectral band through the grating and projects it onto the array detector. The array detector can detect spectral information of a certain wavelength width at one time, and then rotate the grating to obtain a certain wavelength width. The spectral information of the spectral information, and finally splicing these spectral information together to obtain the spectral information of ultra-long wavelength width, but the wavelength accuracy of the current grating scanning spectrograph has always been problematic, which limits its use in some high-precision tests. In the existing technology center, the array detector of the grating scanning spectrograph only collects a ...
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IPC IPC(8): G01J3/40G01J3/06
CPCG01J3/40G01J3/06G01J2003/064G01J2003/068G01J3/0235G01J3/18G01J3/027G01J3/28G01J3/0278G01J2003/069
Inventor 蔡宏太陈海霞
Owner ZOLIX INSTR