Device and method for suppressing speckles in laser projection

A laser projection and speckle technology, applied in projection devices, optics, optical components, etc., can solve the problems of expensive components, poor suppression effect, complicated operation, etc., and achieve the effect of simplified structure, simple device, and good suppression effect.

Pending Publication Date: 2021-12-10
SHENZHEN EVIEWTEK TECH CO LTD
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  • Description
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  • Application Information

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The above method is more complicated to operate, the com

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  • Device and method for suppressing speckles in laser projection
  • Device and method for suppressing speckles in laser projection
  • Device and method for suppressing speckles in laser projection

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[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0020] Please refer to the attached Figure 1-5 , which is a device for suppressing speckle in laser projection disclosed by the present invention, its composition includes a laser light source 1, a collimation module 2, a light homogenizing device 3, a light splitting device 4, a periodic optical path difference device 5, 1 / 4 The glass slide 6 and the detection surface 7 are characterized in that: after the laser light source 1 emits a laser beam, a collimati...

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Abstract

The invention discloses a device and a method for suppressing speckles in laser projection. After the laser light source emits a laser beam, a collimation module, a light equalizing device, a light splitting device, a periodic optical path difference device, a 1/4 slide and a detection surface are sequentially arranged along the direction of the laser beam; the laser light source is arranged at the focal plane of the collimation module, the effective aperture of the light uniformizing device is greater than or equal to the laser beam passing through the collimation module, and the effective aperture of the light splitting device is greater than or equal to the laser beam passing through the light uniformizing device; the effective aperture of the periodic optical path difference device is greater than or equal to the laser beam passing through the light splitting device, the periodic optical path difference device is cooperatively provided with a rotatable 1/4 slide, the rotatable 1/4 slide tangentially rotates by taking the optical axis direction of the laser beam as a rotating axis, and the effective aperture of the rotatable 1/4 slide is greater than that of the laser beam passing through the periodic optical path difference device. According to the invention, a periodic optical path difference device is combined with a 1/4 slide which can rotate around the center in the light beam propagation direction to destroy the polarization state.

Description

technical field [0001] The present invention relates to the technical field of laser display, in particular to a device and method for suppressing speckle in laser projection. Background technique [0002] With the maturity of technology, projection equipment is used in more and more fields, such as home audio-visual, advertising projection, industrial projection inspection, etc. Looking at the rapid development of laser display technology in recent years, laser display has many advantages such as wide color gamut, high brightness, large screen, and low power consumption, making this type of solution one of the next-generation display technologies. [0003] One of the unavoidable problems of laser display is the speckle problem caused by the high coherence of laser light. This random distribution of light intensity in a granular form will seriously affect the picture quality. How to reduce the influence of speckle is an inevitable topic in the field of laser display resear...

Claims

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Application Information

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IPC IPC(8): G02B27/48G03B21/20
CPCG02B27/48G03B21/2073
Inventor 魏威邹思源董俊林丰贺银波
Owner SHENZHEN EVIEWTEK TECH CO LTD
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