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A Raman Spectrometer Based on Sideband Filter

A Raman spectrometer and sideband filter technology, which is applied in the field of microscopic spectrometers, can solve problems such as the impossibility of improving the laser incident light path, and achieve the effects of fast collimation and adjustment of the light path, simple and practical design, and low cost

Active Publication Date: 2017-09-22
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

However, many commercial single-grating Raman spectrometers now use the concept of modular design, and the adjustment of the optical path is very tight. For users who do not understand the principle of Raman optical path, it is basically impossible to use existing commercial Improvement of laser incident light path of single grating Raman spectrometer

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  • A Raman Spectrometer Based on Sideband Filter
  • A Raman Spectrometer Based on Sideband Filter
  • A Raman Spectrometer Based on Sideband Filter

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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0041] The invention discloses a Raman spectrometer, which includes a special bandpass filter and a special sideband filter on its optical path, wherein the special bandpass filter and the special sideband filter are respectively arranged on two-dimensional vertical Straight adjustable frame, so that the position and angle of the laser beam emitted by the Raman spectrometer can be precisely adjusted.

[0042] Preferably, the special bandpass filter is a reflective bandpass filter based on Bragg volume grating technology. The diffraction efficiency of the special bandpass filter is more than 90%; the spectral bandwidth is greater than or equal to 2 wavenumbers, preferably greater than or equal to 5 wavenumbers; the deflect...

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Abstract

The invention provides a Raman spectrometer based on a sideband optical filter. A special band-pass optical filter and the special sideband optical filter are arranged on the optical path and are arranged on adjustable supports respectively, so the position and the angle of laser beams emitted by the single-grating Raman spectrometer can be precisely adjusted. Microscopic confocal measurement of sample Raman signals with the wave number as low as 10 can be conveniently conducted, and the Raman spectrometer has the advantages of being simple in structure, good in stability, convenient to adjust, high in transmittance and convenient to expand.

Description

technical field [0001] The invention relates to the technical field of microscopic spectrometers, in particular to a Raman spectrometer based on sideband filters, with low cost and high transmittance, and a detection capability as low as 10 wavenumbers. Background technique [0002] As we all know, with the development of modern technology, various filters for Raman spectroscopy have emerged. These filters eliminate the need for several monochromators to filter the excitation light, allowing the Raman spectrometer to be very compact. Existing micro-Raman spectrometers integrate lasers, microscopes, confocal pinholes, gratings, and detectors, such as figure 1 shown. So far, single-grating Raman spectrometers using notch filters and sideband filters have dominated the major Raman spectrometer market. Here, the notch filter and the sideband filter not only play the role of reflecting the excitation light to the sample, but also play the role of filtering the Rayleigh line in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/44G01J3/02
CPCG01J3/0205G01J3/0256G01J3/0262G01J3/44
Inventor 谭平恒
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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