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Fluorescence and Raman detection device based on lens group

A detection device and lens group technology, applied in Raman scattering, fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of weak signal and difficult discrimination, and achieve the effect of easy discrimination

Pending Publication Date: 2020-05-15
NAT INST OF METROLOGY CHINA
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] However, because the Raman signal is a weak signal, the signal of some samples directly tested is too weak to be easily distinguished

Method used

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  • Fluorescence and Raman detection device based on lens group
  • Fluorescence and Raman detection device based on lens group
  • Fluorescence and Raman detection device based on lens group

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Embodiment Construction

[0014] The principles and features of the present invention will be described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0015] Raman scattering is caused by the inelastic scattering of light incident on a material. In the process of inelastic collision, energy exchange occurs between the photon and the molecule. The photon not only changes the direction of motion, but also transfers part of the energy of the photon to the molecule, or transfers the vibration and rotation energy of the molecule to the photon, thus changing the frequency of the photon. It also changes the wavelength of the scattered light, and this scattering process is called Raman scattering. For the same substance, the Raman shift has nothing to do with the incident light frequency; for different substances, the Raman shift is different, so the measured substanc...

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Abstract

The invention discloses a fluorescence and Raman detection device based on a lens group, and relates to the field of Raman detection. The device comprises a laser source, a lens group and a volume Bragg grating which are arranged in sequence, wherein the laser source is used for emitting laser to the lens group, the lens group is used for focusing the laser, the volume Bragg grating and the lasersource form a Fabry-Perot cavity, and a sample to be detected is arranged at a focus point of the lens group and used for generating Raman scattering according to the focused laser. According to the fluorescence and Raman detection device based on the lens group provided by the invention, the laser light source with relatively small energy is used, the Fabry-Perot gain cavity is formed between thevolume Bragg grating and the laser source to enhance laser, and the laser is focused through the lens group, so that the sample to be detected is enabled to be located at a focal point in the middleof the lens group, the laser emitted to the sample is enhanced, and a Raman scattering signal generated by the sample is also enhanced, thereby facilitating discrimination.

Description

technical field [0001] The invention relates to the field of Raman detection, in particular to a fluorescence and Raman detection device based on a lens group. Background technique [0002] Raman spectroscopy detection technology is a spectroscopic method that uses Raman spectroscopy to study molecular vibration and rotation. When photons irradiate molecules, they will interact with the molecules of the substance to be detected to generate scattered light. Scattering spectroscopy can characterize molecular vibrations. Or the characteristic frequency shift of the rotational energy level difference, so as to reflect the molecular structure and composition of the substance. [0003] However, because the Raman signal is a weak signal, the signal of some samples directly tested is too weak to be easily distinguished. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a lens group-based fluorescence and Raman detection d...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65G01N21/64
CPCG01N21/64G01N21/65
Inventor 刘晓萌汪洪军张玲王彦丁张金涛
Owner NAT INST OF METROLOGY CHINA
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