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Reverse spatial deflection Raman spectrum detection device and method

A technology of Raman spectrum detection and spatial offset, applied in Raman scattering, material excitation analysis, etc., can solve the problem of inconvenient optical information collection and overall optical path packaging

Inactive Publication Date: 2018-10-23
NORTHWEST UNIV(CN)
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  • Description
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Problems solved by technology

However, the traditional space-shifted Raman spectroscopy requires a group of optical fibers approximately in the form of a ring to receive signals. Compared with receiving signals from point light sources, it is not convenient for the collection of optical information and the packaging of the overall optical path.

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  • Reverse spatial deflection Raman spectrum detection device and method
  • Reverse spatial deflection Raman spectrum detection device and method
  • Reverse spatial deflection Raman spectrum detection device and method

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not as a limitation to the present invention.

[0024] Such as figure 1 As shown, the present invention provides a reverse spatial offset Raman spectroscopy detection technology. According to the Raman scattering photon theory, the laser light is irradiated on the sample surface, and the straight-going Raman photons are scattered laterally, and some photons reach the deep layer of the sample after multiple scattering. The tissue is received at a distance Δs, and the received Raman signal not only contains Rayleigh light but also carries the composition information of the deep tissue of the sample. The reverse space migration Raman spectroscopy technology uses this Raman principle to make the sample surface irradiation area and the Raman photon receiving area sepa...

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Abstract

The invention discloses a reverse spatial deflection Raman spectrum detection device. The device is characterized by comprising a laser device, laser device coupling optical fiber, a collimator, a bypass filter lens, an telescopic sleeve, a conical lens, a dichroscope, a double-glued achromatic lens pair, a long-wave filtering lens, a trapped-wave filtering lens, a spectrum collection optical fiber, a back-illuminated in-depth refrigerating electron-multiplying CCD camera, a spectrograph and a computer. The invention further provides a reverse spatial deflection Raman spectrum detection method. Compared with the prior art, the device has the advantages that the conical lens is used to form an annular light spot to irradiate a to-be-detected sample, and Raman signals are collected at the circle center of a ring and then transmitted to the spectrograph for spectrum analysis to realize noncontact detection of the to-be-detected sample to generate in-depth ingredient Raman spectrum information.

Description

technical field [0001] The invention relates to the field of non-destructive detection of deep material components, in particular to a reverse space migration Raman spectrum detection device and method. Background technique [0002] Raman spectroscopy technology is often used in many counterfeit drug detection, biochemical component analysis, and clinical medical testing applications. Raman spectroscopy analysis method is based on the energy exchange between light and matter to generate inelastic scattered light. spectroscopic analysis method. Raman spectroscopy is a kind of fingerprint spectroscopy, which can identify unknown / known biochemical components based on information such as molecular vibration and rotation, and has the characteristics of non-invasive, non-destructive and high-resolution. Since traditional backscattered Raman spectroscopy can only test to a depth of several hundred microns below the surface, we need newer technologies for non-destructive deep detec...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
CPCG01N21/65
Inventor 王爽张旭李洁宋东良贺庆丽王凯歌
Owner NORTHWEST UNIV(CN)
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