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Waveguide raman scattering cavity based on twice-coupling prism

A Raman scattering and prism technology, applied in the field of waveguide Raman scattering cavity, can solve the problems of insufficient Raman spectral sensitivity and narrow application range, and achieve the effects of Raman scattering enhancement, interference elimination, and scattering cross section enhancement

Pending Publication Date: 2017-09-19
复拓科学仪器(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for liquid samples, the sensitivity of Raman spectroscopy is still not high enough, and its applicable range is still quite narrow, and usually only samples with higher concentrations can be detected

Method used

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  • Waveguide raman scattering cavity based on twice-coupling prism
  • Waveguide raman scattering cavity based on twice-coupling prism
  • Waveguide raman scattering cavity based on twice-coupling prism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: please combine figure 1 As shown, the structure of the waveguide Raman scattering cavity with twice coupled prisms involved in this embodiment is a glass prism 1, an upper silver film 2, an upper silicon dioxide protective film 3, a glass gasket 4, and a lower layer from top to bottom. A silicon dioxide protective film 5 , a lower silver film 6 , a glass substrate 7 , and a glass substrate 8 . The upper silver film 2 and the upper silicon dioxide protective film 3 are deposited on the bottom surface of the glass prism 1 successively, and the lower silver film 6 and the lower silicon dioxide protective film 5 are successively deposited on the surface of the glass substrate 7, and then the glass prism 1, the glass The gasket 4, the glass substrate 7 and the glass substrate 8 are combined into one body by photoresist technology. The materials of glass substrate 7 and glass substrate 8 are both optical glass, and the thickness of glass substrate 7 is smaller tha...

Embodiment 2

[0023] Example 2: please combine Figure 4 The structure of the waveguide Raman scattering cavity with twice coupled prisms shown can also be a glass prism 101, an upper layer of silver film 102, an upper layer of silicon dioxide protective film 103, a glass gasket 104, and a lower layer of silicon dioxide protective film from top to bottom. film 105, lower silver film 106, glass substrate 107. The upper silver film 102 and the upper silicon dioxide protective film 103 are deposited on the bottom surface of the glass prism 101 successively, and the lower silver film 106 and the lower silicon dioxide protective film 105 are deposited on the surface of the glass substrate 107 successively, and then the glass prism 101, the glass gasket 104 and the glass substrate 107 are combined into one body by photoresist technology. A cavity for storing liquid samples to be tested is formed between the glass prism 101 and the glass substrate 107 . Two through holes are opened on the glass ...

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Abstract

The invention discloses a waveguide raman scattering cavity based on a twice-coupling prism. The waveguide raman scattering cavity comprises a glass substrate, a glass gasket and a glass prism which are sequentially overlapped, wherein a sample chamber is formed between the glass substrate and the glass prism, the sample chamber is provided with a sample inlet channel and a sample outlet channel, a lower-layer metal membrane is deposited on the upper surface of the glass substrate, an upper-layer metal membrane is deposited on the lower surface of the glass prism, and the glass prism can meet the conditions that incident light from the lateral side of the glass prism is reflected by the lower surface of the glass prism, then fully reflected by the upper surface of the glass prism and then reflected by the lower surface of the glass prism to be emitted from the other lateral side of the glass prism. The waveguide raman scattering cavity of the structure can achieve low-transmittance narrow-band filtering and obtain a high-sensitivity raman spectrum without using band-stop filter plates.

Description

technical field [0001] The invention relates to a waveguide Raman scattering cavity, in particular to a waveguide Raman scattering cavity based on a twice-coupled prism. Background technique [0002] Raman spectroscopy (Raman spectroscopy) is a spectral analysis technique developed based on the Raman scattering effect. Like Fourier transform infrared spectroscopy, Raman spectroscopy can provide molecular vibration and rotation information for compound analysis. Due to the equivalent bandwidth and high spectral resolution of Raman spectra, people can accurately identify signals with very close spectral intervals and obtain more accurate molecular structure information. Moreover, Raman spectroscopy also has the characteristics of short detection time, simple operation, and small amount of samples required. Therefore, with the continuous development of laser light sources, Raman spectroscopy is widely used in food, biological monitoring, medicine, criminal justice, petrochemica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
CPCG01N21/658G01N2021/651
Inventor 陈凡曹庄琪陈小林王旭成
Owner 复拓科学仪器(苏州)有限公司
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