Device and method for reducing fluorescent background of gas Raman spectrum

A technology of Raman spectroscopy and fluorescent background, which is applied in the field of devices for reducing the fluorescent background of Raman spectroscopy, can solve the problems of insufficient weak signal detection capability, unfavorable portability and miniaturization, etc., and achieve strong feasibility and practicability, structural layout Concise, easy-to-operate effect

Active Publication Date: 2016-07-20
HUAZHONG UNIV OF SCI & TECH +1
View PDF13 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the disadvantages of the Raman detection system in the prior art that are not conducive to the development of portability and miniaturization and insufficient detection capabilities for weak signals, the purpose of the present invention is to solve the above problems

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for reducing fluorescent background of gas Raman spectrum
  • Device and method for reducing fluorescent background of gas Raman spectrum
  • Device and method for reducing fluorescent background of gas Raman spectrum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] 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 the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0034] The present invention is designed based on the above principles, and the provided device for reducing the fluorescence background of the gas Raman spectrum is as follows: figure 1 As shown, it mainly includes a laser 1 , a gas sample chamber 2 , a beam coupling and collecting device 3 , a beam polarization modulation device 4 , a photoelectric receiving conversion device 5 , a signal generator 6 , a lock-in amplifier 7 and a signal output device 8 . In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a device and method for reducing a fluorescent background of a gas Raman spectrum.According to the device, a polarization modulation device conducts periodic polarization modulation on scattered light when a gas sample is analyzed; the intensity of a Raman signal of the gas sample with the good polarization characteristic periodically changes accordingly, the polarization direction of a fluorescence signal coming from the gas sample or a sample room or an optical element and the like has little correlation with the polarization direction of excitation light, and therefore the intensity of the fluorescence signal on a detector basically does not change along with rotating of the polarization modulation device; through a lock-in amplifying method, a gas Raman scattering signal can be detected in the fluorescent background.Accordingly, the influences of the fluorescent background can be reduced, and the detection capacity of the device on weak gas components can be improved; the device is simple and clear in structural layout and convenient to operate and has the very high practicability.

Description

technical field [0001] The invention belongs to the technical field of optical measurement, and more specifically relates to a device for reducing the fluorescence background of Raman spectrum, which is especially suitable for reducing the continuous noise caused by the fluorescence generated by optical elements and sample chambers in Raman scattering devices. Spectrum background. Background technique [0002] Raman scattering is an inelastic scattering phenomenon of photons. After a beam of monochromatic light is scattered by the sample medium, a scattered light with a specific frequency shift relative to the excitation light will be produced. The specific frequency shift corresponds to the energy between the vibration, rotation or electronic energy levels of the sample molecules / atoms Poor; therefore, the composition of the sample can be qualitatively or quantitatively analyzed by the Raman scattering technique. Raman scattering technology is widely used in environmental...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N21/51
CPCG01N21/51G01N2021/513G01N2201/06113
Inventor 余安澜左都罗熊友辉
Owner HUAZHONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap