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Device and method being capable of achieving light beam shaping dodging and speckle eliminating at the same time

A technology of beam shaping and dispersing speckle, which is applied in the direction of optics, optical components, instruments, etc., can solve the problems of unfavorable system miniaturization or miniaturization, high system cost and power consumption, and increased light energy loss, so as to achieve easy promotion and application, Simple structure and low energy loss

Inactive Publication Date: 2015-10-07
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main disadvantages are: (1) many devices are used, the structure is complex, and the stability is poor, which is not conducive to the miniaturization or miniaturization of the system; (2) the loss of light energy is increased and the utilization rate is reduced. The same display screen size and brightness require more power The laser light source; (3) the cost and power consumption of the system are high

Method used

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  • Device and method being capable of achieving light beam shaping dodging and speckle eliminating at the same time
  • Device and method being capable of achieving light beam shaping dodging and speckle eliminating at the same time
  • Device and method being capable of achieving light beam shaping dodging and speckle eliminating at the same time

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Effect test

Embodiment 1

[0034] Such as Figure 1-3 shown.

[0035] A device that can realize beam shaping and homogenization and speckle dissipation at the same time, including a drive motor and a phase plate 1; the phase plate 1 is a phase-type diffraction / scattering microstructure, and the phase plate 1 includes 60 rectangular sub-regions. The phase values ​​corresponding to each sub-area mentioned above are randomly arranged; the phase plate 1 is driven by a drive motor to rotate or vibrate in its plane. Each sub-area is provided with a random microstructure, so that the phase values ​​of each sub-area are randomly distributed and statistically irrelevant to each other, and the microstructure on each sub-area can realize shaping and uniform light.

Embodiment 2

[0037] The device that can realize beam shaping and homogenization and speckle elimination at the same time as described in Embodiment 1 is different in that the phase sheet 1 includes 90 fan-shaped sub-regions.

Embodiment 3

[0039] A method capable of simultaneously realizing beam shaping and homogenization and dispersing speckles, comprising the following steps:

[0040] 1) Using the existing optical micromachining technology to process the transparent flat substrate into a phase-type diffraction / scattering microstructure to form a phase sheet 1; the processed transparent flat substrate is an optical diffraction device, which can play a role in shaping the laser beam.

[0041] 2) Laser beam expansion and collimation;

[0042] 3) start the driving device, drive the phase plate 1 to vibrate or rotate along the plane, so that the beam expanded and collimated laser beam is vertically incident on the surface of the phase plate 1, wherein the frequency of the plane vibration and The frequency of plane rotation is greater than 1000 Hz; during the plane vibration or plane rotation of the phase-type diffractive / scattering microstructure, the laser beam passes through different sub-regions in turn, and the...

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Abstract

The invention relates to a device and a method being capable of achieving light beam shaping dodging and speckle eliminating at the same time. The device comprises a driving device and a phase plate. The phase plate has a phase-type diffraction / scattering microstructure. The phase plate comprises a plurality of sub-regions. The phase values corresponding to the sub-regions are distributed randomly. The phase plate is driven by the driving device to rotate or shake on the plane. The device capable of achieving light beam shaping dodging and speckle eliminating at the same time integrates speckle eliminating and laser shaping on one device, thus laser beam shaping and speckle inhibition and elimination can be carried out at the same time, optical loss is reduced obviously, the light energy utilization rate of laser is raised, energy loss is lowered, and imaging is clear.

Description

technical field [0001] The invention relates to a device and method capable of simultaneously realizing beam shaping and homogenization and dispersing speckle, and belongs to the technical field of laser display. Background technique [0002] Laser has the characteristics of good monochromaticity, strong directionality, and high brightness. Using laser as a display light source has the advantages of wide color gamut, high color saturation, high brightness, and is suitable for large-screen display. In recent years, the research, development and application of laser display technology has developed rapidly, and laser display is becoming the fourth generation of display technology after black and white, color and digital high-definition. However, the good monochromaticity (coherence) of laser light causes serious speckle noise due to effects such as reflection, refraction, interference, diffraction, and scattering when the laser beam passes through the display system. Speckle ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/09G02B27/48
CPCG02B27/0944G02B27/48
Inventor 王玉荣刘敬伟徐仰惠朱丽君江山
Owner SHANDONG UNIV
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