SPECKLE REMOVAL DEVICE BASED ON MIE SCATTERING AND MOTION OF MAGNETICALLY CONTROLLED PARTICLES

摘要

A speckle removal device relating to the technical field of display having a coherent light as a light source, based on Mie scattering and motion of magnetically controlled particles, solves the problems in the prior art of bad speckle removal effect, complex structure, high cost, and being easily damaged. The speckle removal device (300) comprises a closed optical reflective chamber (302) disposed with an incident optical coupler device (301) and a projection emergent surface (303). The inner walls of the closed optical reflective chamber (302) are all mirrors except the inner wall of the projection emergent surface (303). The inside of the closed optical reflective chamber (302) is filled with a solution or a sol (401). Dispersed inside of the solution or sol (401) are magnetic medium particles (402) having a linear dimension that triggers Mie scattering on an incident laser. Disposed for the closed optical reflective chamber (302) is a magnetic field generation device for generating a magnetic field. The electromagnet (308) of the magnetic field generation device is disposed outside of the closed optical reflective chamber. The speckle removal device has a logical, compact structure, high speckle removal effect, and is safe, reliable, and easy to implement at a low cost. The device has high laser utilization rate and stability, and makes illumination even.