Light path structure of echelle grating spectrometer

Abstract

The invention discloses a light path structure of an echelle grating spectrometer, which belongs to the technical field of light spectrum. The invention aims to provide a light path structure applied to high-resolution wide-spectral-range and full-spectrum direct-reading spectrum analysis. According to the technical solution of the invention, the light path structure comprises a condensing mirror, an incident pinhole, a parabolic collimating lens, an echelle grating, a cross dispersion prism set, a parabolic focusing mirror and a detector; light to be measured is collected by the condensing mirror and enters the light path of a spectrometer through the incident pinhole; an incident light beam is collimated into parallel light beams by the parabolic collimating lens, then after the parallel light beams are processed by the echelle grating and the cross dispersion prism set to generate two-dimensional cross dispersion, then the two-dimensional cross dispersion is imaged to a target surface of the detector by the parabolic focusing mirror, thereby obtaining a two-dimensional dispersing spectral image. The light path structure of an echelle grating spectrometer disclosed by the invention is simple and reliable in structure, has no movable parts, and does not need to carry out multiple scanning.

Description

technical field [0001] The invention belongs to the field of spectrum technology, and relates to an optical path structure of an echelle grating spectrometer. Background technique [0002] Spectroscopic instruments are important analytical and testing instruments widely used in scientific research, industrial production and other fields. Adapting to the application requirements of higher resolution, wider spectral range, and full-spectrum direct reading is the development direction of spectral analysis instruments. The echelle grating spectrometer uses a high dispersion, high resolution, full-wave blazed echelle grating as the main spectroscopic element, and its resolution is more than 20 times higher than that of conventional spectrometers, and it has the advantages of small size and full-spectrum transient direct reading. High-end spectroscopic analysis instrument. At present, only a few developed countries have developed such instruments, and companies such as PI, LEEMA...

AI Technical Summary

Problems solved by technology

However, it adopts the traditional scanning and recording method. The spectroscopic optical path system is composed of an echelle grating, a detector and a scanning mechanism. Therefore, the spectral analysis instrument is relatively large in size and cannot achieve full-spectrum direct reading.

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