Wedge mirror laser speckle eliminating device, laser light source and laser display system

A technology of laser speckle and wedge mirror, which is applied in projection devices, optics, optical components, etc., can solve problems such as laser speckle, achieve the effects of improving quality, weakening speckle phenomenon, and low cost

Pending Publication Date: 2017-08-25
HANGZHOU HONGSHI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a wedge mirror eliminating laser spe

Method used

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  • Wedge mirror laser speckle eliminating device, laser light source and laser display system
  • Wedge mirror laser speckle eliminating device, laser light source and laser display system
  • Wedge mirror laser speckle eliminating device, laser light source and laser display system

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Example 1

[0035] Such as figure 2 As shown, the wedge mirror eliminating laser speckle device provided by this embodiment includes a light deflector and a homogenizing rod 1 arranged in sequence along the optical path. The light deflector includes a combination of a rotating mechanism and a wedge mirror 2. The wedge mirror 2 emits The surface is ground glass, and the angle between the incident surface and the exit surface of the wedge mirror 2 is 60°.

Example Embodiment

[0036] Example 2

[0037] Such as image 3 As shown, the wedge mirror eliminating laser speckle device provided by this embodiment includes a light deflector and a homogenizing rod 1 arranged in sequence along the optical path. The optical deflector includes two sets of rotating mechanisms and a combination of the wedge mirror 2 along the optical path (ie image 3 The exit surfaces of the two wedge mirrors 2 in the direction from left to right are the ground glass surface and the glass surface to which the micro lens array is attached. The angle between the incident surface and the exit surface of the two wedge mirrors 2 along the optical path They are 30° and 60° respectively.

Example Embodiment

[0038] Example 3

[0039] Such as Figure 4 As shown, the wedge mirror eliminating laser speckle device provided by this embodiment includes a light deflector and a light homogenizing rod 1 arranged in sequence along the optical path. The light deflector includes a combination of three sets of rotating mechanisms and the wedge mirror 2 along the optical path (ie image 3 From left to right in the middle), the exit surfaces of the three wedge mirrors 2 are the untreated glass surface, the ground glass surface, and the glass surface attached with the microlens array. The three wedge mirrors 2 along the optical path are incident The angle values ​​between the surface and the exit surface are 50°, 30° and 60° respectively.

[0040] In addition to the above wedge mirror eliminating laser speckle device, the present invention also discloses a laser light source, comprising a laser emitting laser and a beam expander receiving laser and emitting laser beam, and also includes the above wedg...

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PUM

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Abstract

The invention discloses a wedge mirror laser speckle eliminating device, a laser light source and a laser display system. The speckle eliminating device comprises an optical deflector and a uniform light stick which are orderly arranged along an optical path. The optical deflector includes the combination of at least one group of rotating mechanisms and a wedge lens. The wedge lens is periodically rotated around an initial space spread direction of a laser beam under the driving of a rotation mechanism and carries out periodic deflection on the space spread direction of the laser beam. The rotation period of the periodic rotation is far smaller than an eye integration time. The uniform light stick collects a periodically deflected laser beam and outputs an imaging light beam. The device can effectively eliminate laser speckle.

Description

technical field [0001] The invention relates to the technical field of laser display. More specifically, it relates to a wedge mirror eliminating laser speckle device, a laser light source and a laser display system. Background technique [0002] Using laser as a light source can be applied to fields including laser projection and liquid crystal laser backlight display, and has the advantages of wide color gamut, long life and high brightness. However, due to the high coherence of laser light, the display screen has the disadvantage of laser coherence speckle. Laser coherence speckle is a kind of interference noise that is formed on the retina due to the interaction of coherent wavelets scattered or reflected by laser light on rough surfaces. Speckle appears as speckle noise on the screen, which will reduce the image quality and easily cause dizziness and visual fatigue. It is one of the technical problems that need to be solved in the field of laser display technology. ...

Claims

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Application Information

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IPC IPC(8): G02B27/48G03B21/20
CPCG02B27/48G03B21/2033G03B21/206
Inventor 刘新厚刘治
Owner HANGZHOU HONGSHI TECH
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