Speckle restraining device for laser light source based on MEMS (micro-electromechanical systems) technology

A laser light source and suppressing device technology, applied in the direction of light guides, optics, optical components, etc., can solve the problems of poor speckle elimination effect, complex structure, and high cost, and achieve good speckle elimination effect, speckle elimination, and low cost low effect

Inactive Publication Date: 2011-05-11
ZHONGBEI UNIV
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Problems solved by technology

[0003] The present invention provides a speckle suppression device for laser light sources based on MEMS technology in order to solve the problems of poor speckle elimination effect, complex structure, easy damage, and high cost existing in existing speckle elimination methods.

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  • Speckle restraining device for laser light source based on MEMS (micro-electromechanical systems) technology
  • Speckle restraining device for laser light source based on MEMS (micro-electromechanical systems) technology
  • Speckle restraining device for laser light source based on MEMS (micro-electromechanical systems) technology

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Embodiment Construction

[0013] Such as figure 1 As shown, the speckle suppression device for laser light sources based on MEMS technology includes a planar optical waveguide splitter 2 processed on a glass substrate 1 by applying MEMS processing technology, and placed on the output waveguide side of the planar optical waveguide splitter 2, A converging lens 3 for converging the output beams of the planar optical waveguide splitter 2, the planar optical waveguide splitter 2 is a planar optical waveguide splitter with a 1×N structure, N≥2, and the planar optical waveguide splitter Each output waveguide of the device 2 is respectively integrated with a phase modulation device 4 .

[0014] Such as figure 2 As shown, the planar optical waveguide splitter of the 1×N structure is composed of several Y-branch structure splitter cores (that is, 1×2 structure splitters), and part or all of the output waveguides of the splitter cores A phase modulation device 4 is integrated on it.

[0015] The phase modula...

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Abstract

The invention discloses a speckle restraining device for a laser light source based on an MEMS (micro-electromechanical systems) technology, relating to the technical field of laser display. The speckle restraining device can be used for solving the problems of poor speckle elimination effect, complex realization structure, high possibility of damaging, high cost and the like of the existing speckle elimination method. The speckle restrain device comprises a planar optical waveguide shunt and a converging lens, wherein the planar optical waveguide shunt is obtained by processing on a glass substrate by the MEMS processing technique; the converging lens is arranged on the output waveguide side of the planar optical waveguide shunt and is used for gathering light beams output by the planar optical waveguide shunt; the planar optical waveguide shunt is of a 1*N structure, wherein N is more than or equal to 2; and each output waveguide of the planar optical waveguide shunt is respectively integrated with a phase modulation device. The speckle restraining device has the advantages of simple structure, mature processing technique, low construction cost, high integration level, good speckle elimination effect and stable performance, and is easy to implement.

Description

technical field [0001] The invention relates to the technical field of laser display, in particular to a speckle suppression device for a laser light source based on MEMS technology. Background technique [0002] When the laser is used as the light source to irradiate the screen, due to the coherence of the laser and the roughness of the screen, the human eye sees an image covered by speckle, which seriously affects the image display quality and prevents the observer from extracting useful information from the image. Therefore, how to eliminate speckle has always been a research and development hotspot in the field of optical instruments and display technology with laser as the light source. As far as the current research results are concerned, the methods used to eliminate speckle can be roughly divided into two categories: 1. Reduce speckle by controlling the temporal coherence of the laser light source. The principle is to adjust the laser wavelength (or frequency) and m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/48G02B6/125G02F1/01
Inventor 陈旭远石云波唐国先刘俊薛晨阳唐军徐美芳党旭冯楠
Owner ZHONGBEI UNIV
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