Projection equipment based on microscopic grating light splitting technology and working method thereof

Abstract

The invention relates to projection equipment based on a microscopic grating light splitting technology and a working method thereof; the projection equipment comprises a laser light source, an optical coupler, a multimode optical fiber, a diffractive optical component and a light homogenizing component, and the optical coupler, the multimode optical fiber, the diffractive optical component and the light homogenizing component are sequentially arranged along a laser transmission path emitted by the laser light source; the laser light source emits a microscopic hyperspectrum; the optical coupler is used for coupling incident microscopic hyperspectral light to the multimode optical fiber; the multimode optical fiber transmits an incident microscopic hyperspectrum to the diffractive optical component; the diffractive optical component receives the microscopic hyperspectrum emitted by the multimode optical fiber and reconstructs a wavefront of the microscopic hyperspectrum, and the phase part of the wavefront of the microscopic hyperspectrum deviates and is emitted to the light homogenizing component; the light homogenizing component homogenizes and transmits the incident microscopic hyperspectrum; compared with the prior art, the projection equipment has the advantages that the time coherence and the space coherence of the microscopic hyperspectrum can be reduced at the same time,and the portability is effectively improved.

Description

technical field [0001] The present invention relates to the field of laser projection technology, in particular, to a projection device based on micro grating spectroscopic technology and a working method thereof. 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] Laser has highly coherent beams with different amplitudes and phases, forming irregularly distributed granular speckle-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 reduce...

AI Technical Summary

Problems solved by technology

[0003] Laser has highly coherent beams with different amplitudes and phases, forming irregularly distributed granular speckle-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

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