Anastigmatic echelle grating spectrometer

Abstract

An anastigmatic echelle grating spectrometer comprises a light collecting unit, a grating splitting unit, a signal processing unit and a display unit, wherein the grating splitting unit mainly comprises an incidence hole, a collimating mirror, an echelle reflection diffraction grating, a transmission diffraction grating and a tire surface reflector; the signal processing unit mainly comprises an area-array photoelectric detector, an A / D conversion circuit and a spectral signal processing subunit. The light collecting unit is arranged in front of the grating splitting unit, the incidence hole, the collimating mirror, the echelle reflection diffraction grating, the transmission diffraction grating, the tire surface reflector and the area-array photoelectric detector are sequentially arranged along an optical path behind the light collecting unit, the incidence hole is located in the optical path focal spot of the light collecting unit, an emergent optical axis of the light collecting unit, the incidence hole and the collimating mirror are coaxial, the reflecting surface of the collimating mirror faces the incidence hole and arranged aslant, the transmission diffraction grating is located behind the echelle reflection diffraction grating and in front of the tire surface reflector, and the signal processing unit is located behind.

Description

Technical field [0001] The invention relates to an astigmatism-eliminating echelle grating spectrometer, which belongs to the technical field of analytical instruments. Background technique [0002] With the development of electronics, machinery, computers, lasers, optical fibers and various advanced manufacturing processes in recent years, the design theory and manufacturing methods of spectroscopy-related instruments have been greatly improved, and the performance of the instruments has also been continuously improved. Applications have been carried out in many fields. In the fields of basic sciences such as astronomy, physics, chemistry, biology, and geography, spectrometers are the most basic and most widely used analytical instruments; in the fields of industrial and agricultural production, spectroscopic instruments and spectral analysis have become indispensable detection and analysis Means: In the fields of aerospace, medical diagnosis, drug development, case analysis, e...

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is to overcome the problems of poor spectral resolution and astigmatism in the existing classical Czerny-Turner structure, and provide an astigmatism-eliminated echelle grating spectrometer, which uses an echelle reflection diffraction grating combined with an ordinary Construction of high-resolution astigmatism-free spectrometer structure by means of transmission diffraction grating and tread mirror

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