Spectral analysis method based on photon counting full spectrum direct reading

A technology of photon counting and spectral analysis, which is applied in spectrum investigation and other directions, to achieve the effects of convenient upgrade and adjustment, low detection limit and high reading accuracy

Inactive Publication Date: 2012-02-15
SHENZHEN SHIJI TIANYUAN ENVIRONMENTAL PROTECTION TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method better solves the technical problem that the traditional spectral analysis method cannot have both "full-spectrum direct reading" and "detection sensitivity", "data stability", "reading accuracy" and "l...

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  • Spectral analysis method based on photon counting full spectrum direct reading
  • Spectral analysis method based on photon counting full spectrum direct reading
  • Spectral analysis method based on photon counting full spectrum direct reading

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Experimental program
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Effect test

Embodiment 1

[0071] Such as figure 1 As shown, a "photon counting full-spectrum direct reading" spectral analysis method specifically includes but is not limited to the following steps:

[0072] S100. After the sample is pre-treated, the characteristic spectrum to be observed is generated under the action of the excitation source 1.

[0073] S200. The composite light mixed with the characteristic spectrum enters the spectroscopic system 2 through the incident optical device;

[0074] S300. The spectroscopic system 2 disperses the incident composite light into a monochromatic spectral image;

[0075] S400. The spectral image is imaged on the sensitive surface of the photon counting imaging detector 3 through the exit optical device;

[0076] S500. Photon counting imaging detector 3 digitally reconstructs spectral images through "position-sensitive detection" and "photon counting";

[0077] S600. The information processing and display unit 4 performs qualitative and quantitative analysis ...

Embodiment 2

[0089] For spontaneous emission and the sample to be measured as a light source, the excitation source 1 is not required, and the step S100 can be omitted, and the rest of the steps are the same as S200-S600. The spectral analysis method corresponding to this embodiment can be used to analyze and study the ultra-weak luminescence phenomenon and the spectral characteristics of general light sources.

Embodiment 3

[0091] According to the difference in the mechanism of the characteristic spectrum generated by the interaction between the sample and the excitation source 1, that is, according to the difference in the mechanism of the characteristic spectrum generated in step S100, the remaining steps S200-S600 remain unchanged, and the "photon counting full-spectrum direct reading" can be derived accordingly Absorption spectroscopy, "photon counting full-spectrum direct reading" emission spectroscopy, "photon counting full-spectrum direct reading" scattering (or Raman) spectroscopy, and "photon counting full-spectrum direct reading" fluorescence spectroscopy and other methods. This embodiment illustrates that the present invention can be used in the analysis of absorption spectrum, emission spectrum, scattering (or Raman) spectrum and fluorescence spectrum.

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Abstract

The invention provides a spectral analysis method based on photon counting full spectrum direct reading. The spectral analysis method comprises the following steps of: generating a characteristic spectrum to be observed by a sample under the action of an excitation source; making multiplex light mingled with the characteristic spectrum incident into a light splitting system through an incident optical device; chromatically dispersing the incident multiplex light into a monochromatic spectral image by the light splitting system; imaging the spectral image on a sensitive face of a photon counting imaging detector; reconstructing the spectral image by the photon counting imaging detector in a digitalized manner through position sensitive detection and photon counting; and qualitatively and quantitatively analyzing the sample by an information processing and displaying unit according to the position of each pixel in the digital spectral image and signal intensity. The spectral analysis method provided by the invention has the advantages of low detection limit, high reading precision, high data stability, large linear dynamic range and the like, and can be used for realizing full spectrum direct reading, that is to say, a plurality of substance components can be analyzed at the same time, each spectral line in a working wavelength range can be fully utilized, the working speed is high, and corresponding instruments have the characteristics of simple structure, high operating stability, low production and operating cost, convenience for upgrading and debugging, and the like.

Description

technical field [0001] The invention relates to an innovative spectral analysis method, namely a "photon counting full-spectrum direct reading" spectral analysis method based on a "photon counting imaging detector". This method better solves the technical problem of "full-spectrum direct reading" and "detection sensitivity", "data stability", "reading accuracy" and "linear dynamic range". On the basis of "spectrum direct reading", the "detection sensitivity", "data stability", "reading accuracy" and "linear dynamic range" of spectral analysis have been improved. [0002] The technical field related to the invention includes the research of spectral analysis method, the application of spectral analysis technology, the manufacture of spectral analysis instrument and the like. Background technique [0003] Spectral analysis technology has the advantages of high sensitivity, good selectivity, convenient and fast operation, strong anti-interference ability and good accuracy. Ac...

Claims

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Application Information

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IPC IPC(8): G01J3/28
Inventor 缪震华赖胜波刘敏敏尹延静杨萍
Owner SHENZHEN SHIJI TIANYUAN ENVIRONMENTAL PROTECTION TECH
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