Speckle suppression device for laser light source in laser display technology

Abstract

The invention relates to the technical field of laser display, in particular to a speckle suppression device for a laser light source in a laser display technology, which solves the problems of poor speckle eliminating effect, complex realization structure, easiness for damage, high cost and the like in the traditional speckle eliminating method. The speckle suppression device comprises a light beam scanning mechanism and a convergence lens, wherein the light beam scanning mechanism contains a transparent material with an electro-optical effect, two opposite end surfaces of the transparent material are respectively used as a laser incident surface and a laser emergent surface, the transparent material is externally provided with electrode plates which are arranged in pairs and are applied with alternating voltages, the transparent material is arranged in an alternating electric field generated by the paired electrode plates, the electric field direction of the alternating electric field is vertical or parallel to the direction that the laser beam of the transparent material passes through, and the position of the convergence lens is opposite to the light beam emergent region of the laser emergent surface of the transparent material. The invention is realized on the basis of the electro-optical effect and has the advantages of good speckle eliminating effect, no need of mechanical vibration, simple realization structure, low cost, low loss and long service life.

Description

technical field [0001] The invention relates to the field of laser display technology, in particular to a speckle suppression device for a laser light source in the laser display technology. 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. Reduce speckle by controlling the temporal coherence of the laser light source. The principle is to adjust the laser wavelength (or frequency...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a speckle suppression device for laser light source in laser display technology 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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