Laser light scattering (LLS)-Raman spectrum joint device

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...

AI Technical Summary

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.

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