Polarized light wide view field transmission-type convergent illumination device and polarized light wide view field transmission-type convergent illumination method

Abstract

The technical scheme of the present invention discloses a polarized light wide view field transmission-type convergent illumination device and a polarized light wide view field transmission-type convergent illumination method. The method comprises the steps of separating the incident laser into a first beam of polarized light and a second beam of polarized light of which the polarization directions are vertical via a polarized beam splitting part; using the polarized beam splitting part to polarize and rotate the first beam of polarized light to enable the polarization directions of the firstbeam of polarized light and the second beam of polarized light to be same or reverse; using a polarized light synthesizing part to synthesize the second beam of polarized light and the first beam of polarized light after the polarization and rotation into a homodromous and coaxial synthesized light beam; integrating the synthesized light beam into the illumination light satisfying the view field requirements via a transmission-type beam expanding and converging part. Therefore, according to the technical scheme of the present invention, the two parts of polarized light of which the polarization directions are vertical in the incident laser can be utilized to carry out the polarized light illumination, and the laser energy waste is avoided.

Description

technical field [0001] The invention relates to the technical field of laser lighting, and more specifically, to a polarized light wide field of view transmissive converging lighting device and method. Background technique [0002] In the process of underwater object detection, the use of blue-green polarized laser active illumination imaging can effectively suppress the backscattering of the illumination laser in water, improve the imaging contrast of underwater objects, improve the imaging quality, and provide high-quality data for image analysis; in addition, The surface characteristics such as refractive index and roughness of underwater objects can be analyzed through the degree of polarization to provide measurement data for target recognition. [0003] Most of the laser is partially polarized light. After passing through the polarizer, the laser will produce two parts of polarized light whose vibration directions are perpendicular to each other. In the prior art, when...

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Problems solved by technology

[0003] Most of the laser is partially polarized light. After passing through the polarizer, the laser will produce two parts of polarized light whose vibration directions are perpendicular to each other. In the prior art, when polarized light is used for illumination, only one of the polarized lights in the polarization direction is generally used, resulting in laser energy waste of

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