A Moving Wedge Fourier Spectrometer

Abstract

The invention belongs to the field of spectrum technologies, and provides a novel movable optical wedge type Fourier spectrometer. The novel movable optical wedge type Fourier spectrometer aims to solve the problem that the spectral resolution is low by means of existing movable optical wedge type Fourier spectrum technologies. Light rays emitted by a light source system penetrate through a small hole and reach a collimating mirror, and the light rays reflected by the collimating mirror are divided by a diaphragm into three beams of parallel light with the same aperture; the parallel light forms three beams of coherent light after passing through a movable optical wedge interferometer, and the three beams of coherent light are focused on a detector A, a detector B and a detector C through three reflectors and three focusing mirrors respectively; a reference light path system comprises a frequency stabilized laser and a laser detector, light emitted by the frequency stabilized laser is reflected by the reflectors and then passes through the movable optical wedge interferometer, so that interference light is obtained, and the interference light is focused on the laser detector after being reflected by the reflectors; the movable optical wedge interferometer changes optical path difference and receives and records interference light intensity varying with the optical path difference through the detector A, the detector B, the detector C and the laser detector respectively.

Description

technical field [0001] The invention belongs to the field of spectrum technology, in particular to a moving optical wedge Fourier spectrometer. Background technique [0002] Spectroscopic instruments are the basic test equipment for spectral analysis. Compared with traditional dispersive spectroscopic instruments, Fourier spectrometers are widely used due to their advantages of multi-channel, high throughput, low stray light, high wavenumber accuracy and high spectral resolution. In scientific research, material analysis, industrial testing, space remote sensing detection and other fields. [0003] The traditional time-type Fourier spectrometer has extremely strict requirements on the moving mirror system. The non-uniformity of the scanning speed of the moving mirror will lead to the sampling error of the interferogram. Affect the signal-to-noise ratio; compared with the traditional Michelson-type Fourier spectrometer, the moving optical wedge Fourier spectrometer has a dif...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a moving optical wedge Fourier spectrometer to solve the problem of low spectral resolution in the prior art

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