Spatial offset Raman spectrum detection system

Abstract

The invention provides a spatial offset Raman spectrum detection system, which is characterized in that an SORS light path device is used for collecting Raman signals and focusing the Raman signals to an input end of a collection optical fiber bundle; the collection optical fiber bundle comprises a circular input end and a linear output end, the circular input end is used for receiving an offset Raman signal focused by the SORS light path device from a sample, and the diameter of the collection optical fiber bundle or / and the number of collection optical fibers contained in the collection optical fiber bundle are / is increased along with the increase of the space offset by taking an excitation position as an original point; the Raman signal which is weakened along with the increase of the space offset is compensated; and the optical fiber bundle linear output end is used for converting the circular arrangement of the circular input end into linear arrangement and is coupled with an entrance slit of the spectrograph. According to the invention, the problem of weak Raman signal intensity at a large spatial offset position in a conventional SORS device or a light path can be effectively solved, and the signal intensity difference between the zero position and the maximum position of the spatial offset is reduced.

Description

technical field [0001] The invention relates to a spectrum detection device, in particular to a spatially shifted Raman spectrum detection system. Background technique [0002] Raman spectroscopy can reflect the vibrational information of material molecules and has good chemical specificity, so it is widely used in the fields of food, medicine and biological detection. Traditional Raman spectroscopy can only detect information on the surface of a sample, or through transparent surfaces. The new Spatially Offset Raman Spectroscopy (SORS) was first proposed by British scientist A.W. Parker in 2005 (related patent numbers: US7652763, CN101115987, EP1828753, US7911604, GB2457212, AU2005313145, JP5449712007). SORS can penetrate the opaque sample surface or outer packaging to obtain chemical information carried by deeper substances. Therefore, spatially offset Raman spectroscopy has a wide range of applications in non-destructive deep detection, such as non-invasive detection of...

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Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a spatially offset Raman spectroscopy detection system, which is used to solve the problem that the larger the spatial offset of the SORS technology in the prior art, the weaker the Raman signal is. question

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