Spectrometer and working method

Abstract

The invention provides a spectrograph and a working method. The spectrograph comprises a light source and a detector. The spectrograph further comprises a beam splitter, a first reflection unit, a second reflection unit, a third reflection unit, a fourth reflection unit, a fifth reflection unit and a motion mechanism. The beam splitter is arranged on a light path of measuring light emitted by the light source so as to divide the measuring light into a first light beam and a second light beam; the first reflection unit reflects the first light beam to the third reflection unit; the second reflection unit reflects the second light beam to the third reflection unit; one lateral face of the third reflection unit reflects the first light beam to the fourth reflection unit and the other lateral face of the third reflection unit reflects the second light beam to the fifth reflection unit; the included angle between the reflection face of the third reflection unit and the reflection face of the beam splitter is an acute angle; the fourth reflection unit reflects the first light beam to enable the first light beam to return to the beam splitter along the original path and enter the detector; the fifth reflection unit is used for reflecting the second light beam to enable the second light beam to return to the beam splitter along the original path and enter the detector; the motion mechanism is used for moving the third reflection unit horizontally and / or rotating the third reflection unit. The spectrograph has the advantages of being simple in structure, high in resolution ratio, low in cost and the like.

Description

technical field [0001] The invention relates to spectral analysis, in particular to a spectrometer and a working method. Background technique [0002] The basic principle of the Fourier transform infrared spectrometer is: the collimated infrared beam enters the interferometer, and the interferogram under different optical path differences is obtained through the movement of the moving mirror in the interferometer. The function of the path difference change, the obtained interferogram is Fourier transformed, and the corresponding spectrum can be obtained, so as to realize the spectrum detection. The interferometer is the core component of the Fourier transform infrared spectrometer. The optical path difference provided by the interferometer directly determines the resolution of the spectrometer. [0003] The classic Michelson interferometer can only provide an optical path difference twice the moving distance of the moving mirror, so the Fourier transform infrared spectrome...

AI Technical Summary

Problems solved by technology

[0003] The classic Michelson interferometer can only provide an optical path difference twice the moving distance of the moving mirror, so the Fourier transform infrared spectrometer based on the classical Michelson interferometer must increase the moving range of the moving mirror in order to obtain high-resolution spectra , a voice coil motor or linear motor with a large stroke is required, which will increase the size and cost of the spectrometer

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