Optical rotation angle field detection device based on polarized beam splitting imaging and measurement method thereof

Abstract

The invention discloses an optical rotation angle field detection device based on polarized beam splitting imaging and a measurement method thereof. The device comprises a polarized light generating device, a polarized beam splitting device, a light receiving and imaging device, an image acquisition device and a data processing system, wherein the polarized light generating device emits a bundle of linearly polarized light; the linearly polarized light is vertically incident to the polarized beam splitting device and forms two bundles of linearly polarized light after emergence from the polarized beam splitting device; the two bundles of light are respectively received by the light receiving and imaging device; and then, the light intensity information of the two bundles of light is transferred to the data processing system through the image acquisition device and is processed by the data processing system to obtain an optical rotation angle field. In the invention, the detection process is free from manual adjustment, the operation is simple, and errors caused by manual adjustment can be avoided; a two-dimensional field in a polarization state can be obtained directly by adoptingan imaging and image processing algorithm, the detection result is more visual and accurate and is free from the effect of light source fluctuation.

Description

technical field [0001] The invention belongs to the technical field of photoelectric detection, and in particular relates to a new method for measuring an optical rotation angle field based on polarized beam splitting imaging and a detection device thereof. Background technique [0002] Polarization measurement has been widely used in many industries as an effective detection method. For example, polarized light is commonly used to measure the concentration of solutions, the characteristics and uniformity of crystals, and the blood sugar concentration of human body. In addition, it is often used to measure the size and distribution of magnetic fields in the field of non-destructive testing, and it is often used in remote sensing detection and space navigation in the field of aerospace. [0003] The traditional polarization measurement method uses polarization extinction to measure the polarization state change. This method firstly adjusts the analyzer so that it is perpendi...

AI Technical Summary

Problems solved by technology

This method can effectively reflect the two-dimensional field information of optical rotation, but it can only describe qualitatively but not quantitatively give the angle of rotation, and it still needs to manually adjust the analyzer like the extinction method, which makes the operation complicated and the accuracy low. The method is greatly affected by the fluctuation of the light source

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