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Light source system for eliminating laser speckles and projection device

A light source system and laser speckle technology, applied in the field of projection light source systems, can solve the problems of increasing system complexity and power consumption, and achieve the effect of reducing speckle contrast

Inactive Publication Date: 2017-08-29
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Abstract
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Problems solved by technology

Driving the movement of the diffuser requires a motor, which will also increase the complexity and power consumption of the entire system, and may generate certain noise

Method used

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  • Light source system for eliminating laser speckles and projection device
  • Light source system for eliminating laser speckles and projection device

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Embodiment Construction

[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the invention shown in the drawings and described with reference to the drawings are merely exemplary and the invention is not limited to these embodiments.

[0023] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the solution according to the present invention are shown in the drawings, and the related structures and / or processing steps are omitted. Other details not relevant to the invention.

[0024] This embodiment first provides a light source system for eliminating laser speckle, refer to figure 1 The ligh...

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Abstract

The invention discloses a light source system for eliminating laser speckles. The light source system comprises a laser light source module which is used for generating laser beams including red light, green light and blue light; a beam scanning mechanism which is used for reflecting the laser beams, wherein the beam scanning mechanism periodically swings so that the laser beams are enabled to form the divergent surface light source through scanning; a first lens which is used for converting the divergent surface light source into a parallel surface light source; a micro-lens array group which is used for converting the parallel surface light source into multiple divergent surface beams; and a second lens which is used for converting the multiple divergent surface beams into multiple parallel surface beams, wherein the multiple parallel surface beams are converged at the focus of the second lens. The invention also discloses a projection device comprising the light source system. The light source system is simple in structure and easy to implement and can effectively reduce or eliminate the laser speckles.

Description

technical field [0001] The present invention relates to a projection light source system, in particular to a light source system for eliminating laser speckle and a projection device including the light source system. Background technique [0002] In the projection optical system, because the laser has good monochromaticity, high color purity, and according to the principle of three-color synthesis, it has the largest color triangle area on the chromaticity diagram, so it has incomparable advantages over other light sources. However, when a laser light source with excellent coherence irradiates an optically rough surface (screen), the screen surface can be divided into many surface units, the light reflected by each unit will have a phase difference, and interference will occur when they meet in space, forming irregular The speckle pattern of the distributed granular structure. The existence of speckle will lead to partial loss of image information content, and will reduce ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20G02B27/48
CPCG03B21/2013G02B27/48G03B21/2033G03B21/208
Inventor 沈文江周鹏吴东岷王懋
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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