Laser speckle eliminating device with dodging function

A laser speckle and optical function technology, applied in optics, optical components, instruments, etc., can solve the problem of unimproved beam non-uniformity

Inactive Publication Date: 2011-10-12
XIAN UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that the structure of the laser itself needs to be changed, and the beam inhomogeneity of the laser beam itself has not been improved.

Method used

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  • Laser speckle eliminating device with dodging function
  • Laser speckle eliminating device with dodging function
  • Laser speckle eliminating device with dodging function

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Embodiment Construction

[0017] The present invention will be described in detail below in conjunction with specific embodiments.

[0018] figure 2 It is a structural schematic diagram of the laser speckle elimination device with uniform light function of the present invention, including a laser light source, a transmission medium, a vibration module, and the vibration module is fixedly connected to the transmission medium.

[0019] image 3 It shows the internal structure diagram and optical path schematic diagram of the present invention, wherein the laser beam 301 emitted by the laser light source is transmitted through the transmission medium 303 with the scatterer 302 inside, and the scatterer 302 is made of a material different from the transmission medium 303 and is distributed with a uniform density In the transmission medium, under normal circumstances, the transmission medium 303 can use polymethyl methacrylate, and the scatterer 302 mostly uses 4 μm SiO with a mass fraction of 0.3wt%. 2 ...

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Abstract

The invention discloses a laser speckle eliminating device with the dodging function. The device comprises a laser light source, a transmission medium and a vibration module, wherein the vibration module is fixedly connected with the transmission medium; a scattering body is arranged in the transmission medium; the scattering body is formed by distributing the material which is different from thetransmission medium with uniform density in the transmission medium; the vibration module is vibrated under the action of a power supply, thereby driving the transmission medium and the scattering body to vibrate together; and the input power of the vibration module is adjusted to adjust the vibration amplitude of the transmission medium and the scattering body until the optimal speckle eliminating effect is obtained.

Description

technical field [0001] The invention relates to a laser speckle elimination device with uniform light function, belonging to the technical field of laser imaging. Background technique [0002] Laser has the characteristics of good directionality, high brightness, good monochromaticity, and good coherence. It is these characteristics that make lasers used in various fields. However, due to the particularly good coherence of the laser, speckle noise will be formed during imaging, which affects the imaging quality, and speckle needs to be controlled. In the typical hollow rectangular strong laser beam output by the laser, the intensity distribution of the beam is non-uniform along the direction of the flow field. The inhomogeneity of the light intensity distribution will lead to non-uniform thermal deformation of the numerous reflective mirrors in the laser transmission channel, which will distort the wavefront distribution of the final output beam of the laser system, resulti...

Claims

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Application Information

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IPC IPC(8): G02B27/48G02B27/09
Inventor 贺锋涛
Owner XIAN UNIV OF POSTS & TELECOMM
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