Laser light source based on multi-element composite speckle elimination

Abstract

The invention relates to a laser light source based on multi-element composite speckle elimination. The laser light source comprises a plurality of light source devices, a bundled optical fiber, a collimating lens, a coupling lens, a projection device and a projection lens; the plurality of light source devices, the bundled optical fiber, the collimating lens, the coupling lens, the projection device and the projection lens are sequentially arranged in one light path; the plurality of light source devices generate a plurality of laser beams; shaping and dodging are carried out on the multiplelaser beams, and multiple shaped laser beams are generated and enter the bundled optical fiber; the bundled optical fiber couples the plurality of laser beams into a plurality of sub-optical fibers ofthe bundled optical fiber through an optical fiber coupler; the projection device uses the coupling lens to irradiate the plurality of laser beams to the projection device at different angles; and the laser beam content is amplified and projected to a screen through the projection lens. Compared with the prior art, the laser light source can achieve composite speckle elimination, and the speckleelimination effect is improved.

Description

technical field [0001] The present invention relates to the field of projection technology, in particular to a laser light source based on multi-element composite dispersive speckle. Background technique [0002] In the prior art, for example, the application number is 201920897670.6, a multi-light coupled laser projection speckle-dissipating optical path device, including a laser module, a lens group, a broadband incoherent light source module, a converging lens and a uniform light tube. The lens group is arranged on the outgoing light direction of the laser module, and the lens group is vertically arranged in the broadband incoherent light source module and is located above the reflector provided in the broadband incoherent light source module. A converging lens is arranged in the direction of the outgoing light of the band incoherent light source module, the homogenizing tube is arranged on one side of the converging lens and the end face of the homogenizing tube is pla...

AI Technical Summary

Problems solved by technology

However, the existing technology still has the following deficiencies: 1. The projection display has low saturation and poor color authenticity; 2. The effect of dissipating speckles is poor

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