Optical method for detecting discerptible medium skin layer and deep layer information

A separation medium and optical detection technology, applied in the field of optical detection, can solve problems affecting the accuracy of measurement results

Inactive Publication Date: 2004-03-31
TIANJIN SUNRISE TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Otherwise, surface information and deep information will converge to the receiving end, which will greatly affect the accuracy of measurement results

Method used

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  • Optical method for detecting discerptible medium skin layer and deep layer information
  • Optical method for detecting discerptible medium skin layer and deep layer information
  • Optical method for detecting discerptible medium skin layer and deep layer information

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In this experiment, a complete verification experiment method is designed for the principle of the optical detection method of the above-mentioned separable medium surface and deep layer information. In this experiment, fresh pigskin is used as the experimental sample, and the specular reflection component and the backscattered light component in the reflected light are studied separately by using the light blocking method. The experiment proves that when the linearly polarized light is used as the light source, the specular reflection component remains The original polarization state, but the backscattered light entering the tissue after multiple scattering events will lose its polarization state and become unpolarized light, thus verifying the realization principle of the polarization method. In addition, the experiment also verified the realization principles of the light blocking method and the Brewster's angle method.

[0043] Experimental device such as Figure 7...

Embodiment 2

[0065] Embodiment 2: Polarization method embodiment

[0066] This embodiment uses the polarization method to eliminate the reflected light on the surface of the tissue, and realizes the non-contact spectroscopic measurement of the components in the human body, especially the non-invasive measurement of the blood sugar of the human body. Measuring devices such as Figure 9, the experimental object is the palm of a volunteer, and the spectral measurement is completed by an FT spectrometer 20 (Spectrum GX FTIR spectrometer, Perkin-Elmer Inc.), using a 250W bromine tungsten lamp as the external light source 32, which is input into the FT through the lens 33, and then After the FT is split, it is transmitted to the reflector 21, and then coupled to the near-infrared light-guiding fiber 23 through the converging lens 22, and the light output from the fiber is converged to the palm 41 of the measured part through the lens 24 and the polarizer 34. The reflected light is coupled into ...

Embodiment 3

[0068] Embodiment 3: embodiment of light blocking method

[0069] In this embodiment, the light-shielding method is used to eliminate the reflected light on the surface of the tissue, and the non-contact spectroscopic measurement of the components in the human body, especially the non-invasive measurement of the blood sugar in the human body is realized. Measuring devices such as Figure 11 , the system uses AOTF as the optical splitting device 42 . The system light source 32 adopts a 250W halogen tungsten lamp, which is incident on the AOTF crystal through the lens 33. The AOTF crystal is driven by the radio frequency drive module 37 controlled by the computer 38, and realizes the spectroscopic scanning of the input light. The split light is coupled into the light guide fiber 23 through the converging lens 22 , and then converged to the measured part (palm 41 ) through the lens 24 . The light blocking sheet 26 eliminates the surface reflected light, and the reflected light ...

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Abstract

An optical detecting method of the disintegrating dielectric superficial coat and deep layer information, wherein the illuminating source irradiates on the tested sample structure through an incidence unit, which is then processed by the receiving unit and detected by the detector, the instrumentation system is used for accomplishing the separation of the dielectric skin layer and the deep layer information, and the optical gauge head and the test sample structure are non-contacting.

Description

technical field [0001] The invention relates to an optical detection method, in particular to an optical detection method capable of separating surface layer and deep layer information of a medium. Background technique [0002] Optical detection method is currently the most widely used non-destructive information detection method. When light of a specific wavelength or band is incident on a medium, due to the influence of different factors such as composition, concentration, and particle size in the medium, the absorption and scattering characteristics of the medium are different, and the transmitted light or reflected light through the medium also carries different Optical properties, by analyzing these properties, information such as composition, concentration and particle size in the medium can be obtained. It is based on this principle that the optical measurement of substance composition and concentration has been widely used. In recent ye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/00G01N21/49
CPCG01N21/49A61B5/0059A61B2562/0242
Inventor 徐可欣邱庆军苏翼雄
Owner TIANJIN SUNRISE TECH DEV
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