High-resolution spectrometer system

Abstract

The embodiment of the present invention discloses a high-resolution spectrometer system, including a slit, a collimating mirror assembly, an imaging mirror assembly, and a photodetector. The system also includes a planar grating, wherein the beam emitted by the object is transmitted to the collimating mirror through the slit Components; the collimating mirror component collimates the light beam to obtain parallel light, and makes the parallel light shoot to the plane grating at an incident angle θ0; the parallel light is diffracted by the plane grating to obtain diffracted light, and the diffracted light is converged to the light detector after passing through the imaging mirror component On the device; the grating constant of the plane grating is d, θ0 and d satisfy the first relational expression and the second relational expression at the same time, and λ is the wavelength of parallel light. In the embodiment of the present invention, only the 0th-order diffracted light and the +1-order diffracted light are obtained after the light beam is diffracted by the plane grating, which reduces non-working order stray light, improves energy utilization, and improves the performance of the entire system.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of high-resolution spectroscopy, in particular to a high-resolution spectrometer system. Background technique [0002] High-resolution spectroscopy is an important means to obtain target spectral information, and grating spectroscopy is one of the more mature technologies in spaceborne high-resolution spectrometers. Compared with spectroscopic instruments using other types of spectroscopic techniques, grating spectrometers have the advantages of linear distribution of spectra, high spectral resolution, high ground resolution, and easy calibration. However, for traditional grating spectrometers, the light beam has multi-level spectra (0-level, +1-level, +2-level and even higher-level spectral regions) after diffraction by the grating, resulting in reduced energy utilization and non-working order When the diffracted light enters the optical system, it is easy to form stray light, which r...

AI Technical Summary

Problems solved by technology

However, for traditional grating spectrometers, the light beam has multi-level spectra (0-level, +1-level, +2-level and even higher-level spectral regions) after diffraction by the grating, resulting in reduced energy utilization and non-working order Diffraction light is easy to form stray light after entering the optical system, reducing the performance of the entire system

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