Miniature fourier transform spectrometer based on modulation

A Fourier transform and spectrometer technology, applied in the field of micro Fourier transform spectrometer, can solve the problems of difficult to guarantee the repeatability and reliability of the system, complex structure, poor real-time measurement, etc. reliable results

Active Publication Date: 2008-08-27
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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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 sys

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  • Miniature fourier transform spectrometer based on modulation
  • Miniature fourier transform spectrometer based on modulation
  • Miniature fourier transform spectrometer based on modulation

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Embodiment Construction

[0023] The structure of the spatially modulated micro-spectrometer of the present invention is as follows: figure 1 As shown, 1 is the light source to be measured, which is an extended light source, which is not part of the structure of the spectrometer, but the detection target of the spectrometer. The spectrometer is mainly composed of three basic parts: a collimation system 2 , a spectroscopic system and a detection and receiving system, all of which are fixed on the substrate 10 . The substrate 10 plays a structural supporting role in the whole structure, and can be made of metal material or silicon wafer.

[0024] The collimation system 2 is a combination of optical lenses, the distance between the light source and the lens is the focal length of the lens combination; the detection and receiving system is composed of a converging lens combination 6 and an area array detector 7, and the area array detector 7 is located at the converging lens combination 6 on the focal pla...

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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...

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Application Information

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IPC IPC(8): G01N21/45
Inventor 梁中翥梁静秋孔延梅禹秉熙
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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