Light polarization regulating and shaping system

Abstract

The invention relates to a light beam polarization state adjusting rectifying system, composed of an incident beam expanding rectifying device, an external reflection cone reflector, a cylinder curved polarizer, an internal cone reflector, an incident 1/2 wave plate, an exit 1/2 wave plate and an exit beam expander, which arranged on a symmetrical optical axis in turn of an incident light beam optical path, wherein the incident light beam passes the incident beam expanding rectifying device to be reflected by the external reflection cone reflector to form a radial light beam, to be changed of light beam polarized state via the cylinder curved polarizer, to be reflected by the internal reflection cone reflector to form a circular vector light beam, the polarization direction can be adjusted by changing the optical axis angle of the two 1/2 wave plates and a circular vector polarization light beam of required size can be obtained after the exist beam expander. The light beam polarization state adjusting rectifying system can convert a non-rotation vector polarized light beam to a rotation vector polarized light beam, having low incident light beam requirements, high system stability and reliability, and easy adjustment of the light beam polarized state and the transverse size.

Description

technical field [0001] The invention relates to a beam shaping system, in particular to a beam polarization adjustment shaping system. It is mainly used in the fields of laser micromachining, optical micromanipulation, optical information storage, and interaction between light and matter. technical background [0002] The generalized beam shaping system includes not only the adjustment of the geometric size of the beam, but also the adjustment of other parameters such as the beam wavefront phase, polarization state distribution, intensity distribution, and pulse width in the time domain. The shaping system of the present invention can shape the beam geometry and polarization state distribution. The rotating vector polarized beam refers to the beam whose transverse polarization state presents a symmetrical distribution of the rotational axis. Due to its special beam focusing properties and propagation characteristics, the rotating vector polarized beam plays an extremely imp...

AI Technical Summary

Problems solved by technology

In the prior art, there is an adjustable vector beam shaping system that can generate partially rotated vector polarized beams (see the Chinese invention patent "Adjustable Vector Beam Shaping System", patent number: ZL200410052913.4). The system has considerable advantages, but there are still some essential deficiencies, mainly: 1) if the prior art is used to produce a general form of rotation vector polarized beam, the necessary condition is that the incident beam of the system must be the rotation vector polarized beam Special forms, such as radially polarized beams or azimuthally polarized beams, however, the generation of radially polarized beams and azimuthally polarized beams also belongs to...

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