System for realizing flexible variable-angle array diffractive optical element

Abstract

A system for realizing flexible variable-angle array diffractive optical element includes a mechanical module, an electrical control module and an optical module. The optical module includes a laser,a calibration lens, a diaphragm, a flexible variable-angle array diffractive optical element, an imaging lens, a projection screen, a CCD camera and a computer processing system. The laser is a monochromatic laser of arbitrary wavelength in the visible light range. The laser, the calibration lens, the diaphragm, the flexible variable-angle array diffractive optical element and the imaging lens areon the same optical axis. The mechanical module includes a crawler-type conveying device. The electric control module includes a drive motor used for driving the crawler-type conveying device to rotate so as to drive the flexible variable-angle array diffractive optical element to do crawler-type motion. The system has the advantages of good full-band speckle suppression effect, simple mode of motion, easy implementation, good system versatility and robustness, and low cost.

Description

technical field [0001] The invention belongs to the field of laser display projection, and in particular relates to a realization system of a flexible variable-angle array diffractive optical device, which uses a movable diffractive optical device to suppress laser speckle. Background technique [0002] Laser projection display system is getting more and more attention and welcome because of its rich colors, high picture quality, long life, high reliability, high efficiency, low energy consumption and other advantages. However, since laser light is highly coherent light, a picture noise called laser speckle will inevitably be generated. Speckle appears as black spots randomly distributed in the laser spot, and its essence is the random coherent superposition of signals. The existence of speckle seriously affects the quality of images and information. In the field of laser projection display, speckle will degrade the image quality of projection display, cause viewers to expe...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the insufficient effect of speckle suppression in the existing technology, the inability to perform full-band speckle suppression, the number and types of devices used in the system, the complexity of moving parts and impact damage to the instrument, large size, complex structure of the instrument, high energy consumption, However, due to the disadvantages of low efficacy and other disadvantages, the present invention provides a realization system of a flexible variable-angle array diffractive optical device with good full-band speckle suppression effect, simple movement mode, easy implementation, system versatility, good robustness, and low cost. Made of flexible materials, through variable-angle array diffraction structures, to build a crawler-type movement that can circulate infinitely at a constant speed, and use a system to achieve red, green, and blue full-band laser speckle suppression

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