Speckle eliminator based on Mie scattering and magnetic control particle motion

Abstract

The invention relates to the technical field of display by the adoption of coherent light as a light source, in particular to a speckle eliminator based on Mie scattering and magnetic control particle motion, which solves the problems of poor speckle elimination effect, complex implementation structure, easiness of damage, high cost and the like in the traditional speckle elimination method. The speckle eliminator based on Mie scattering and magnetic control particle motion comprises an enclosed type optical reflection cavity, wherein an incident light coupler and a transmitted and emergent surface are arranged on the enclosed type optical reflection cavity; the inner wall of the enclosed type optical reflection cavity, except from the inner wall of the transmitted and emergent surface, is a mirror surface inner wall; a solution or sol is filled into the enclosed type optical reflection cavity; magnetic medium particles the sizes of which can enable incident laser to generate Mie scattering are distributed in the solution or the sol; the enclosed type optical reflection cavity is provided with a magnetic field generator for generating a magnetic field; and an electromagnet of the magnetic field generator is arranged outside the enclosed type optical reflection cavity. The speckle eliminator based on Mie scattering and magnetic control particle motion has the advantages of reasonable and compact structure, easiness of implementation, low cost, good speckle elimination effect, high laser utilization rate, stable performance, safety and reliability, and dodging function.

Description

technical field [0001] The invention relates to the field of display technology using coherent light as a light source, in particular to a speckle elimination device based on Mie scattering and magnetron particle movement, mainly aimed at the optical speckle phenomenon existing in laser display technology and optical instruments. Background technique [0002] When the laser is used as the light source to irradiate the screen, due to the coherence of the laser and the roughness of the screen, the human eye sees an image covered by speckle, which seriously affects the image display quality and prevents the observer from extracting useful information from the image. Therefore, how to eliminate speckle has always been a research and development hotspot in the field of optical instruments and display technology with laser as the light source. As far as the current research results are concerned, the methods used to eliminate speckle can be roughly divided into two categories: 1. ...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a speckle elimination device based on Mie scattering and magnetron particle movement in order to solve the problems of poor speckle elimination effect, complex structure, easy damage, and high cost existing in existing speckle elimination methods.

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