Optical splitting system of flattening convex surface grating

Abstract

The invention relates to an optical splitting system of a flattening convex surface grating, comprising a light source, a light condenser, an incident narrow slot, a large-concave-surface reflecting mirror, a convex-surface grating and a surface array detector, wherein the sphere centers of the convex-surface grating and the large-concave-surface reflecting mirror are arranged on a same point, optical shafts are superposed, the incident narrow slot is arranged at a public sphere center of the convex-surface grating and the large-concave-surface reflecting mirror and is vertically arranged in a plane of a public optical shaft, the direction of the incident narrow slot is parallel to a notching direction of a grating, the surface array detector is arranged at the public sphere center of the convex-surface grating and the large-concave-surface reflecting mirror and is vertically arranged in the plane of the public optical shaft, the surface array detector and the incident narrow slot are arranged on two sides of the optical shaft, and white lights emitted by the light source are radiated to the large-concave-surface reflecting mirror through a focus lens and the incident narrow slot, is reflected and radiated to the convex-surface grating through the large-concave-surface reflecting mirror, is radiated onto the large-concave-surface reflecting mirror after passing through a diffracted wave diffracted by the convex-surface grating, and is finally converged to the surface array detector through the large-concave-surface reflecting mirror. The optical splitting system disclosed by the invention has the advantages of high spectrum resolution, approximative zero of spectral image distortion, simple structure, convenience in installation and low manufacturing cost.

Description

technical field [0001] The invention relates to a spectroscopic instrument, in particular to a flat image field convex grating spectroscopic system. Background technique [0002] The spectroscopic system is the core component of the spectroscopic analysis instrument. At present, planar gratings or concave gratings are generally used as spectroscopic elements. A spectroscopic system using a planar grating as a spectroscopic element requires a mechanical scanning structure to achieve spectral analysis. The concave grating as the spectroscopic element can adopt a scanning structure, or use the focusing effect of the concave grating to continuously distribute the spectrum on a plane, and use it in combination with an area array detector to achieve high-speed analysis and miniaturization of the instrument and lightweight. However, the dispersion spectrum of the flat image field concave grating spectroscopic system has relatively serious aberrations, which brings difficulties in...

AI Technical Summary

Problems solved by technology

[0004] The present invention is aimed at the problem that the structure of the current light splitting system is relatively complicated, and the requirements for manufacture, installation and debugging are relatively high, and a flat image field convex grating light splitting system is proposed.

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