Laser light scattering (LLS)-Raman spectrum joint device

A technology of laser light scattering and Raman spectroscopy, applied in Raman scattering, material excitation analysis, etc., can solve problems such as inability to combine measurement and analysis, increase measurement cost, and inconvenience of analysis and measurement, and achieve suitable popularization and high work efficiency , good business prospects

Inactive Publication Date: 2012-04-11
HUNAN UNIV OF SCI & TECH
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  • Abstract
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  • Claims
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Problems solved by technology

Traditional Raman spectroscopy and laser light scattering photon correlation spectroscopy are analyzed and measured by independent instruments. Its disadvantage is that it cannot be combined for measurement and analysis, which increases the cost of measurement and brings inconvenience to analysis and measurement.

Method used

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  • Laser light scattering (LLS)-Raman spectrum joint device
  • Laser light scattering (LLS)-Raman spectrum joint device
  • Laser light scattering (LLS)-Raman spectrum joint device

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Such as figure 1 as shown, figure 1 It is the optical circuit diagram of the 90-degree light scattering photon correlation spectrum and Raman spectrometer in the present invention. It consists of a laser, a mirror M 1 , 1 / 2 wavelength plate P 1 , focusing lens L 1 , sample cell S, pinhole diaphragm H, scattering imaging lens L 2 , Scattering imaging lens L 3 , filter F, monochromator, photoelectric converter, signal amplifier, pulse counter, correlator and computer. Mirror M 1 Reflect the laser light onto the sample in the sample cell S; the half-wavelength plate P 1 The laser polarization direction can be changed for polarization spectrum measurement; focusing lens L 1 Focus the laser on the sample in the sample cell S; the bottom surface and four sides of the sample cell S are light-passing; the aperture diaphragm H ...

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Abstract

The invention discloses a laser light scattering (LLS)-Raman spectrum joint device. In the invention, light scattering optical paths at 90 degrees, 180 degrees and a small angle are arranged in test excitation light paths of laser excitation samples; scattered light of the excitation samples at 90 degrees, 180 degrees and a small angle enters a spectrometer through an imaging lens and a Rayleigh light filter; the spectrometer scans and records spectrums to obtain the Raman spectrum; the scattered light of the excitation samples at 90 degrees, 180 degrees and the small angle enters the spectrometer through a diaphragm and the imaging lens; and the spectrometer is controlled to scan to the position of laser excitation wavelength, and the slit width is adjusted so that only the scattered light with the laser excitation wavelength can pass through the slit so as to carry out photon counting measurement and photon correlation scattering measurement, which realizes combination between LLS and the Raman spectrum. The LLS-Raman spectrum joint device has the beneficial effects of achieving the purposes of analyzing the structure and characteristics of a material by means of light-scattering photon correlation spectrum and Raman spectrum joint measurement, overcoming the unicity of the traditional Raman spectrometer test method, and expanding the application range of the laser Raman spectrometer.

Description

technical field [0001] The invention belongs to the field of optical analysis instruments, in particular to a combined laser light scattering-Raman spectrum device. Background technique [0002] Since the Raman scattering phenomenon was discovered by the Indian physicist Raman in 1928, it has become more and more popular due to the remarkable characteristics of Raman spectroscopy, such as rich information, Raman shift is independent of the frequency of incident light, high analysis efficiency and less sample consumption. Widespread concern. In recent years, Raman spectroscopy can accurately detect the composition and content of substances, and has become an important research analysis in many fields such as chemical analysis, surface chemistry, mineralogy, semiconductor materials, environmental protection, biomedicine, food medicine, and archaeology. means. [0003] Dynamic light scattering is due to the Brownian motion of polymers in solution, which makes the light intens...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
Inventor 黄笃之
Owner HUNAN UNIV OF SCI & TECH
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