Polarization direction continuous collaborative regulating device for micro-Raman spectroscopy

Abstract

The invention discloses a device for continuously and collaboratively regulating the incident light and scattered light polarization direction for a micro-Raman spectroscopy. A transmission gear is respectively meshed with a driving gear and the large gear of a double-link gear. A half-wave plate and a polaroid gear are hollow gear rings, and the hollow circles thereof are respectively inlaid into a half-wave plate and a polaroid. The half-wave plate gear and the polaroid gear share the same center of circle. A transition gear is arranged between the small gear of the double-link gear and the half-wave plate gear, the polaroid gear is meshed with the large gear of the double-link gear, and two positioning gears are meshed with the half-wave plate gear and the polaroid gear. Being a box-like structure, the device is implanted into the public optical path of incident light and scattered light of the Raman spectroscopy, a manual turntable serves as a control part, variable speed transmission is implemented through the transmission and the rotation of the gear structure and the double-link gear, the polarizer angle of the half-wave plate and the polarization angle of the Polaroid are collaboratively controlled through one-step operation, so as to conveniently realize the continuous collaborative regulation of the incident light and scattered light polarization direction with high precision.

Description

Technical field [0001] The invention belongs to optical machinery, and specifically relates to a device for continuous and coordinated adjustment of the polarization directions of incident light and scattered light for a micro-Raman spectrometer. Background technique [0002] As we all know, the Raman microscope is an advanced experimental analysis instrument that combines modern optical microscopy technology and Raman scattering spectrometer, and is widely used in experimental analysis in many fields. Using the good polarization of the laser to analyze the Raman scattering characteristics of the studied object under various polarized light excitations is an important application method of Raman microscopy. Many of the measurement tasks require the incident light and scattering at any time in the experiment. The polarization direction of the light is continuously coordinated. Among them, continuous means that the polarization angle can be adjusted to any angle within the circle,...

AI Technical Summary

Problems solved by technology

However, none of the current microscopic Raman spectrometers can provide a device capable of realizing this function, and polarization adjustment is generally achieved by using independent devices for incident and scattering

In this way, on the one hand, it is impossible to realize the continuous adjustment of the polarization directions of incident light and astigmatism. On the other hand, the coordinated adjustment operation is quite cumbersome, often requiring the operator to walk repeatedly or cooperate with multiple experimenters.

Moreover, multiple adjustments are easy to bring dust or other debris into the spectrometer, which affects its accuracy and life.

Therefore, the existing experimental system that uses separate control of incoming and outgoing polarization is difficult to meet the experimental analysis that needs to adjust the polarization direction of incident light and scattered light at any time, and even makes some experiments impossible to implement.

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