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Raman spectrometer system with dual-wavelength light source

A Raman spectrometer, dual-wavelength technology, applied in the field of optical detection, to achieve the effect of small instrument size, improve detection sensitivity and detection accuracy, and avoid beam crossing

Pending Publication Date: 2022-01-07
北京泓泰天诚科技有限公司
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  • Application Information

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Problems solved by technology

This existing technology uses a multi-channel fiber optic sensor to collect Raman scattered light passing through the sample, but it can only be used for the detection of single-wavelength light sources

Method used

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  • Raman spectrometer system with dual-wavelength light source

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Embodiment 1

[0041] pass figure 1 A four-channel Raman spectrometer is set in the connection mode, wherein two channels are the Raman scattered light obtained by 532nm light source irradiation and finally projected on the CCD detector 11, and the corresponding pixel bits are [10,45] and [60,95] respectively; The Raman scattered light acquired by the other two channels irradiated by a 785nm light source is finally projected on the same CCD detector 11, and the corresponding pixel bits are [105, 140] and [155, 190] respectively.

[0042] Choice of two independent volume holographic transmission gratings:

[0043] 532nm laser grating: Raman shift is set to 200-4000cm -1 , 532nm converted into a frequency of 1 / 532nm = 18796.99cm -1 , the range of Raman scattered light is [18796.99-4000,18796.99-200]cm -1 , converted into a wavelength of 537.7~675.8nm, the spectral range of the system is determined to be 530~670, and the center wavelength is 600nm. Considering the size of the system and the ...

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Abstract

The invention discloses a dual-wavelength light source Raman spectrometer system, wherein the system comprises a laser light source group, a volume holographic transmission grating group and a CCD detector; the laser light source group has laser light sources with two wavelengths, the light sources with two wavelengths respectively excite two material samples with different properties; the volume holographic transmission grating group comprises two independent volume holographic transmission gratings which are respectively used for receiving Raman scattering light generated after the light sources with the two wavelengths excite the two samples; and different areas of the CCD detector are used for receiving parallel light beams after the Raman scattering light from the two holographic transmission gratings is split. According to the multi-channel Raman spectrometer for detecting the laser light sources with the two wavelengths, two samples with different types and characters can be detected by same equipment through the dual-wavelength light sources, and a plurality of samples with the same type can be detected at the same time through the arrangement of multiple channels, so that the multi-channel Raman spectrometer is convenient and rapid.

Description

technical field [0001] The invention relates to the technical field of optical detection, in particular to a dual-wavelength light source Raman spectrometer system. Background technique [0002] Raman spectroscopy is when a certain frequency of laser light is irradiated on the sample, the energy conversion between the molecules of the substance and the photons occurs, so that the vibration of the chemical bonds between atoms in the molecule changes in different ways and degrees, and then light of different frequencies is scattered, and the frequency changes. Depending on the characteristics of the scattering material, different types of chemical bonds between atoms vibrate in a unique way, so scattered light with a specific difference in frequency from the incident light can be produced, and the difference spectrum is called "Raman spectrum". Raman spectrometer is an instrument that irradiates samples with laser light, collects Raman scattered light for signal analysis, and ...

Claims

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Application Information

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IPC IPC(8): G01N21/65G01N21/01
CPCG01N21/65G01N21/01G01N2201/06G01N2201/06113G01N2201/08
Inventor 史昕刘兴红赵士鉴
Owner 北京泓泰天诚科技有限公司
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