Miniature fourier transform spectrometer based on modulation

Abstract

The invention belongs to the spectrometer technical field, in particular relating to a miniature Fourier transform spectrometer based on modulation, mainly comprising a collimation system, a beam splitting system and a detection receiving system, wherein, light beams which are transmitted by a light source to be detected are collimated by the collimation system and then incident upon a beam splitter which divides incident light into two bundles of coherent light with equal intensity; one bundle of the coherent light is reflected by the beam splitter, incident upon a second reflector and then returns back to the beam splitter after reflection; the other bundle of the coherent light is incident upon a first step mirror and returns back to the beam splitter after reflection; a plurality of localization interference fringes are formed by interference of light which are reflected on different positions of the second reflector and the first step mirror on different positions of the space of the detection receiving system. The miniature Fourier transform spectrometer has the advantages of high luminous flux, high resolution, good repeatability, reliable operation, good measuring real-time performance and so on, realizes simultaneous sampling of all levels on the basis of removing a laser reference interferometer and can be widely applied to various spectrum measurements like light sources and so on.

Description

technical field [0001] The invention belongs to the technical field of spectrum measuring instruments, relates to a modulation-based miniature spectrometer (FTS), in particular to a novel modulation-based micro-Fourier transform spectrometer based on the Michelson interference principle for spatial energy division. Background technique [0002] Spectroscopic instruments are powerful tools for analyzing the composition and structure of substances. They are widely used in scientific research fields and industries such as environmental monitoring, chemical analysis, biomedicine, national defense and optoelectronic functional materials, and online real-time monitoring in these fields and industries Requirements such as portability and portability have promoted the development of miniaturization of spectroscopic instruments, and have broad application prospects. [0003] In recent years, research on miniaturized spectrometers has progressed very rapidly. Most of the existing mini...

AI Technical Summary

Problems solved by technology

This kind of spectrometer uses time modulation to realize the modulation of optical signals, and multiple localized interference fringes are sequentially formed at the receiving point of the detection system; because the moving mirror as a mirror requires a high-precision driving system, the driving system contains moving parts , so the repeatability and reliability of the system are difficult to guarantee and the real-time performance of the measurement is poor; and this kind of spectrometer needs to use a laser reference interferometer to determine the sampling point, so its structure is complicated

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