A crystal birefringence test system based on tunable broadband laser

Abstract

The invention discloses a crystal birefringence test system based on an adjustable wide-band laser, which includes a laser, an optical path unit, an electrical signal processing unit, and a data processing unit; Using the optical unit that can compare the degree of birefringence phase delay deviation between crystal pressurization and non-pressurization in real time, combined with the electrical signal processing unit and data processing unit, it is possible to simultaneously measure the pressure and non-pressurization of the crystal under different band laser irradiation. The photoelastic coefficient of the crystal material in this state is realized, and the birefringence measurement and phase delay deviation degree comparison of the crystal differential pressure state and the non-pressurized state are realized under the wide-band tunable laser. The invention has high measurement precision, simple structure and easy realization, and effectively makes up for the blank of stress birefringence test of crystal material under pressurized condition in the prior art.

Description

technical field [0001] The invention belongs to the technical field of optical material stress measurement, and in particular relates to a crystal birefringence measurement system based on a tunable broadband laser. Background technique [0002] With the continuous development of optical technology, optical materials for various purposes have gradually entered the public's field of vision. Among them, crystal materials are one of the most commonly used optical materials in optical systems, with a wide range of applications, involving military, aerospace, medical and communications. and other aspects. Because the internal structure of most crystalline materials is inherently inhomogeneous, and when light propagates in a heterogeneous body, its propagation speed and refractive index value change with the vibration direction, resulting in birefringence. In the application in various fields, the birefringence of the crystal material will cause the deterioration of the image qua...

AI Technical Summary

Problems solved by technology

However, looking at the research on the stress birefringence of crystal materials at home and abroad, most of them stay in the visible light band, and there are very few studies on the infrared band. It is used to measure the crystal stress birefringence in the visible and infrared adjustable band Coefficient equipment is blank

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