Polarized beam splitting prism and method

Abstract

The invention relates to a unit extraordinary refraction rochon prism, comprising a single cuboid made of iceland crystals. A value of a crystal optic axial angle alpha can be selected in the range of 46.6 degrees to 46.3 degrees according to using wavelength. The range of applicable wavelength of the prism is from 300 nm to 1800 nm, and an extinction ratio excels 10 to 5. The extraordinary refraction polarized beam splitting method comprises the steps of: shooting beams into a unit uniaxial birefringent crystal prism, enabling o light to directly pass through the crystal prism, and keeping the o light in the same direction with the refraction beams after emergence; performing total reflection of e light with extraordinary refraction in an incident end face in the internal surface of the crystal prism, and performing extraordinary reflection again when reaching an emergence end face; and generating a beam splitting angle after the emergence of the two beams of light in the emergence end face. The invention is the polarizing beam splitting method and the unit extraordinary refraction rochon prism with higher technical index and the realization of multiple functions. The characteristic of beam splitting of the prism indicate the prism has multiple functions of polarized beam splitting, adjustable beam splitting angles with incidence angles, polarization and analysis. The invention has very important practical significance in the application technical fields such as laser technology, optical test, optical modulation, and the like.

Description

technical field [0001] The invention discloses a polarization beam splitting method and unit structure extraordinary refraction polarized beam splitting method in which ordinary light (o light) is directly transmitted in a uniaxial birefringent crystal prism, and extraordinary light (e light) undergoes extraordinary refraction-total reflection-extraordinary refraction. A beam prism belongs to the technical field of optical devices. Background technique [0002] Polarizing devices are important devices in the field of laser technology and polarization application technology, and polarizing beam splitting prisms are an important category of polarizing devices. Its research and development are of great significance to the development of modern optical technologies such as optical communication, optical information processing, optical testing, laser technology and optical computing. Before the present invention was made, common polarizing devices often adopted multiple designs,...

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used polarizing beam splitting prisms mainly include Wollaston prisms, double Wollaston prisms, Rochon prisms, beam splitting Glan-Thompson prisms and Savall plates, etc., and the designs of these devices are mostly multi-crystal structures. Combined with glue, this structure has good main technical indicators such as device beam splitting performance, extinction ratio, and transmittance, but the anti-light damage threshold is low and the temperature stability of the structure is poor, and the design of a small number of unit structures Generally, the function is single, such as the Savall plate can only produce a small transverse shear difference

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