MOEMS (micro optical electronic mechanical system) laser scanning micromirror array speckle suppression device

Abstract

An MOEMS laser scanning micromirror array speckle suppressing device relates to beam control optical fiber speckle elimination technology, which solves the technical problems of the existing laser speckle suppressing device with large volume and structure, high power consumption, complex structure and cumbersome operation process. The present invention is composed of M×N scanning micromirrors, and a single scanning micromirror consists of a fixed anchor point rotating along the X axis, a fixed anchor point rotating along the Y axis, a torsion beam rotating along the X axis, and a torsion beam rotating along the Y axis Composed of reflective mirrors; under the drive of electromagnetic force or electrostatic force, etc., synchronously control all scanning micromirrors to realize scanning in X and Y directions; or independently control a single scanning micromirror to realize scanning in X and Y directions; the reflection The mirror surface is a circular mirror surface, a square mirror surface, an arc mirror surface or other irregular shapes. The laser speckle suppression device of the present invention has the advantages of small size, low power consumption, simple structure, easy integration and convenient operation under the premise of achieving the same speckle suppression effect.

Description

technical field [0001] The invention belongs to the technical field of light beam regulation optical fiber speckle elimination, and in particular relates to a MOEMS laser scanning micromirror array speckle suppression device. Background technique [0002] Generally, existing technologies utilize the monochromatic and directional properties of lasers, which are widely used in laser lighting, such as laser displays. [0003] When a coherent laser beam is transmitted through a rough scatterer or is reflected by a rough scatterer, the interference of light waves will occur on the rough surface of the scatterer: speckle, which shows granular non-uniform light and dark light intensity distribution. In laser displays, the presence of speckle degrades image quality and must be suppressed. [0004] At present, limited by the optical power of laser diodes, fiber-optic coupling is generally used in high-lumen laser displays to integrate multiple collimated red, green, and blue laser ...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art, provide a MOEMS laser scanning micromirror array speckle suppression device, and solve the problems of the existing laser speckle suppression device with large volume structure, high power consumption, complex structure, and cumbersome operation process. technical problem

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