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Laser speckle dissipation diffusion wheel device

A speckle and laser technology, applied in optics, optical components, instruments, etc., can solve the problems of laser speckle reducing image display quality, complex speckle dissipation system, large size of diffuser, etc., to achieve cost saving and speckle dissipation effect. Good, compact system

Pending Publication Date: 2022-08-05
安徽翰视激光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention proposes a laser speckle-dissipating diffusion wheel device, which organically combines diffusion sheets with different spatial frequency distributions of diffusion particles, and at the same time, through dynamic movement, better solves the problem of laser scattering in laser display. Spots reduce image display quality
[0005] At the same time, it solves the problems of large diffuser size, inconvenient installation, and complicated speckle dissipation system in the existing laser speckle dissipation system.

Method used

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  • Laser speckle dissipation diffusion wheel device
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  • Laser speckle dissipation diffusion wheel device

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Experimental program
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Effect test

Embodiment 1

[0035] When implementing, follow these steps:

[0036] 1) The laser light source on the laser 6 enters the diffuser surface 3 on the left side of the diffuser 2 through the focusing lens 7, and starts the motor 1 to drive the diffuser 2 to rotate. At this time, the diffuser 2 adopts a circular structure, and the surface of the diffuser 2 It contains a large number of diffusing particles 5. The size and shape of the diffusing particles 5 are different. The distribution of the diffusing particles 5 presents an irregular distribution, and the spatial distribution frequency is different. According to the optical path layout, the severity of the speckle and the speckle distribution, The size of each diffuser can be the same or different, modulating the laser, destroying the spatial coherence of the laser, and eliminating or reducing the laser speckle;

[0037] 2) The focused laser light source passes through the scattering surface 3 and the non-scattering surface 4 on the rotating ...

Embodiment 2

[0039] 1) The laser light source on the laser 6 enters the diffuser surface 3 on the left side of the diffuser 2 through the focusing lens 7, and simultaneously starts the motor 1 to drive the diffuser 2 to rotate. At this time, the diffuser 2 adopts a circular structure, and the diffuser 2 One or more scattering sheets 21, 22, ..., 2N are used, and each of the scattering sheets 21, 22, ..., 2N contains a large number of diffusing particles 5 on the surface, and the size and shape of the diffusing particles 5 are all Differently, the distribution of the diffusing particles 5 presents an irregular distribution, and the spatial distribution frequency is different. Modulation destroys the spatial coherence of the laser and plays the role of eliminating or reducing laser speckle;

[0040] 2) The focused laser light source passes through the scattering surface 3 and the non-scattering surface 4 on the rotating scattering sheet 2, and enters the light path of the projector's illumin...

Embodiment 3

[0042] When implementing, follow these steps:

[0043] 1) The laser light source on the laser 6 enters the diffuser surface 3 on the left side of the diffuser 2 through the focusing lens 7, and simultaneously starts the motor 1 to drive the diffuser 2 to rotate. At this time, the diffuser 2 adopts a polygonal structure, preferably a hexagonal structure , and the surface of the diffusing sheet 2 contains a large number of diffusing particles 5. The size and shape of the diffusing particles 5 are different. The distribution of the diffusing particles 5 presents an irregular distribution, and the spatial distribution frequency is different. According to the optical path layout, the severity of speckle Depending on the speckle distribution, the size of each diffuser can be the same or different, modulating the laser, destroying the spatial coherence of the laser, and eliminating or reducing the laser speckle;

[0044] 2) The focused laser light source passes through the scattering...

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Abstract

The invention relates to a laser speckle-eliminating diffusion wheel device, which comprises a motor (1) and a scattering sheet (2), the motor (1) is installed at the central position of the scattering sheet (2), the motor (1) can drive the scattering sheet (2) to rotate, the left side surface of the scattering sheet (2) is a scattering surface (3), the right side surface of the scattering sheet (2) is a non-scattering surface (4), and diffusion particles (5) are attached to the surface of the scattering surface (3). According to the scheme, the diffusion sheets with diffusion particles distributed at different spatial frequencies are organically combined, and meanwhile, through dynamic movement, the problem that the image display quality is reduced due to laser speckles in laser display is well solved; and meanwhile, the problems of large diffusion sheet size, inconvenience in installation, complexity of the speckle eliminating system and the like in the existing laser speckle eliminating system are solved.

Description

technical field [0001] The invention relates to the field of laser projection display, in particular to a laser dissipating spot diffusion wheel device. Background technique [0002] At present, most of the lighting parts of the projection system use LED light sources, blue laser excitation phosphor light sources, etc. These light sources are limited by the excitation material, resulting in low color saturation of the light source, which cannot restore images well. Due to the low electro-optical efficiency of LED light sources, It does not meet the requirements of energy-saving and high-brightness projection. The existing laser is a high-brightness, strong directional light source that emits a monochromatic coherent beam. Due to its many advantages, the laser has been gradually used as a light source in the field of projection display technology in recent years. , the high coherence of the laser brings the speckle effect in the laser projection display, which causes the dete...

Claims

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Application Information

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IPC IPC(8): G02B27/48
CPCG02B27/48
Inventor 吴新民任治辉
Owner 安徽翰视激光科技有限公司