Laser beam light balancing and shaping and speckle eliminating integrated device

Abstract

The invention provides a laser beam light balancing and shaping and speckle eliminating integrated device, which belongs to the field of laser displaying and illuminating and particularly relates to the fields of laser projection displaying and infrared laser night viewing. In the device, laser beam light balancing and shaping and speckle eliminating are considered uniformly, speckles are eliminated by adopting a rotary holographic scattering device, light balancing and shaping are realized by adopting a pure phase diffusion apparatus, and a holographic scattering apparatus, a micro direct current motor, the pure phase diffusion apparatus and a Fourier transform lens are connected and fixed into an entire body with a compact structure, so that the aims of balancing and shaping laser beam light and eliminating speckles are fulfilled simultaneously. The holographic scattering apparatus and the pure phase diffusion apparatus are thin-sheet diffusion optical apparatuses, have small sizes and are thin and light, so that optical-mechanical-electrical integration and miniaturization are easy to realize; moreover, the integrated device is made of a double refraction material, so that the integrated device has polarization maintaining performance, makes full use of the inherit linear polarization property of laser light and further increases the utilization ratio of light energy.

Description

technical field [0001] The invention relates to an integrated device used for laser projection display and laser lighting, capable of simultaneously realizing uniform light shaping of laser beams and dispersing spots, and belongs to the field of laser display and lighting. Background technique [0002] Laser has the characteristics of high brightness, monochromaticity (coherence) and good directionality. It is very important and widely used in scientific research, engineering technology and industrial and agricultural production; laser projection display and infrared laser night vision are two of them. an important field of application. Laser projection display uses lasers to replace traditional light sources (such as ultra-high pressure mercury lamps, etc.) in existing projection display systems. It has the advantages of high brightness, large color gamut, high color purity and saturation, etc. At present, the research on laser projection display technology is in the ascend...

AI Technical Summary

Problems solved by technology

When the pure phase diffraction optical device is used in the lighting system of laser projection display or infrared laser night vision, as far as the device itself is concerned, a better uniform lighting effect can be obtained, but dust, scratches on other optical devices in the system The multiple reflections on the front and rear surfaces will still cause relatively obvious speckle and background interference diffraction fringes, which will seriously affect the imaging quality of the video image (such as imaging clarity, image resolution, etc.), especially when using three When the primary color laser realizes color display or imaging, the existence of speckles and stripes will form irregular color flickering phenomenon, which is not conducive to color gamut management, resulting in distortion or deterioration of picture color, and easy to cause eye fatigue

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