Birefringence measuring device and ordinary light and extraordinary light measuring method based on birefringence measuring device

Abstract

The invention discloses a birefringence measuring device and an ordinary light and extraordinary light measuring method based on the birefringence measuring device. The birefringence measuring device comprises a polarized light generating unit, an anti-dazzling screen with a light hole and a polarization analyzer, the polarized light generation unit is arranged on the incident light side of the anti-dazzling screen; the polarization analyzer is arranged on the emergent light side of the anti-dazzling screen; a sample to be tested is arranged between the anti-dazzling screen and the polarization analyzer; the anti-dazzling screen is used for blocking incident light deviating from the light hole. The anti-dazzling screen is arranged on the incident light side of the to-be-measured sample, and the incident light deviating from the light hole is shielded by the anti-dazzling screen so that the measuring device can measure the to-be-measured sample of any size. According to the ordinary light and extraordinary light measuring method, the ordinary light refractive index and the extraordinary light refractive index of the to-be-measured sample can be obtained only by using the light intensity of the polarized light outputted by the birefringence measuring device and using a simple calculation formula without using reflected light to calculate the refractive index, the calculation formula is simple, the calculation amount is small, and the result is accurate.

Description

technical field [0001] The application relates to a birefringence measuring device and a method for measuring ordinary light and extraordinary light based on the device, belonging to the technical field of optical measurement. Background technique [0002] Birefringence is a phenomenon in which a light beam incident on an anisotropic crystal is decomposed into two beams of light, and the two beams of light are refracted in different directions. After the light wave is incident on the anisotropic crystal, except for the special direction, birefringence will occur, and it will be decomposed into two kinds of polarized light whose vibration directions are perpendicular to each other, different propagation speeds, and different refractive indices. One of the rays obeys the law of refraction, called ordinary ray, or O-ray for short; the other ray does not refract according to the angle of the law of refraction, called extraordinary ray, or E-ray for short. [0003] In the prior ...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a birefringence measurement device to solve the technical problem that existing measurement devices are difficult to measure samples to be measured less than 5mm

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