RGB pure laser direct connection coupled projection system

Abstract

The invention relates to an RGB pure laser direct connection coupling projection system, which comprises a laser light source, an optical coupler, a multimode optical fiber, a diffractive optical component and a dodging component. The optical coupler, the multimode optical fiber, the diffractive optical component and the dodging component are sequentially arranged along a laser transmission path emitted by the laser light source; the laser light source emits three-primary-color laser; the optical coupler couples incident three-primary-color laser light to the multimode optical fiber; the multimode optical fiber transmits the incident three-primary-color laser to the diffractive optical component; the diffractive optical component receives the three-primary-color laser emitted by the multimode optical fiber and reconstructs the wave front of the three-primary-color laser, and the phase part of the wave front of the three-primary-color laser deviates and is emitted to the dodging component; and the dodging component performs dodging transmission on the incident three-primary-color laser. Compared with the prior art, the time coherence and the space coherence of the three-primary-color laser can be reduced at the same time, and speckles generated by the laser are effectively restrained.

Description

technical field [0001] The present invention relates to the technical field of laser projection, in particular to an RGB pure laser direct coupling projection system. Background technique [0002] Primary color laser projector, in which the laser light emitted by semiconductor lasers (blue DLP, green DLP and red DLP) enters the optical machine after beam expansion, shimming, decoherence, etc., and the optical machine modulates the incident beam and outputs it to the projector lens, and finally projected onto the screen to form a projected image. [0003] The laser has highly coherent beams with different amplitudes and phases, forming irregularly distributed granular speckles-laser speckle at each point in space. As a random process, laser speckle is an objective physical phenomenon that must exist with the use of lasers. Laser speckle not only causes energy loss, but also becomes the main factor that limits image quality and reduces image resolution and contrast Conte...

AI Technical Summary

Problems solved by technology

Laser speckle not only causes energy loss, but also becomes the main factor that limits image quality and reduces image resolution and contrast

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