Device and method for eliminating laser speckles

A laser speckle and laser technology, applied in optics, optical components, instruments, etc., can solve the problems of low energy utilization rate of incident beam, reduced speckle suppression effect, poor system stability, etc., and achieve simple structure and system stability. Good performance and low cost

Pending Publication Date: 2019-07-05
WUXI MILEWAVE PHOTONICS TECH CO LTD
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AI Technical Summary

Problems solved by technology

When using the dynamic speckle method, the faster the speckle change frequency, the smaller the correlation between the speckles, and the better the speckle suppression effect after time averaging. However, the current dynamic speckle method has a complex structure and poor system stability.
At present, in speckle elimination, the control range of speckle frequency is limited, and the depth of phase adjustment is small, which makes speckle correlation greater. The above factors reduce the effect of speckle suppression. Large, and accompanied by the phenomenon of angular spread, which affects the performance of the system

Method used

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  • Device and method for eliminating laser speckles
  • Device and method for eliminating laser speckles
  • Device and method for eliminating laser speckles

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Embodiment Construction

[0034] The present invention will be further described now in conjunction with accompanying drawing.

[0035] Such as Figure 1 to Figure 3 As shown, a device for eliminating laser speckle includes a first reflection device 103, a first reflection surface is provided on the first reflection device 103, the first reflection device 103 is located on one side of the laser module 301, and the first reflection surface Facing the laser module 301; the second reflection device 102, the second reflection device 102 is provided with a second reflection surface, the first reflection surface is parallel to the second reflection surface, and the first reflection surface is used to reflect the laser beam 201 to the second reflection surface. a reflective surface; and a piezoelectric ceramic 101 , the piezoelectric ceramic 101 is fixed on the back of the second reflective surface of the second reflective device 102 .

[0036] After the laser beam 201 is vibrated by the piezoelectric cerami...

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Abstract

The invention relates to a laser device, in particular, a device for eliminating laser speckles. The device comprises a second reflection device, wherein a second reflection surface is set on the second reflection device, the second reflection device is located at one side of a laser module, and the second reflection surface of the second reflection device is used for reflecting a laser beam; andpiezoelectric ceramic which is fixed on the back of the second reflection surface of the second reflection device. According to the device for eliminating the laser speckles provided by the invention,the laser speckles can be effectively controlled. The device is low in cost, is easy to assemble and adjust, is stable in performance, is convenient for use, and is simple in light path, few in energy loss, simple in structure and good in system stability.

Description

technical field [0001] The invention relates to a laser device, in particular to a device and method for eliminating laser speckles. Background technique [0002] Due to its high brightness, high coherence and high collimation, laser has played a unique and vital role in the fields of industry, communication, medicine, scientific research and social life. Because multimode fiber-coupled lasers have the advantages of high efficiency, small size, and long life, modules using multimode fiber-coupled lasers have a wide range of applications in laser medical treatment, laser detection and measurement, and instrumentation. Laser beams are highly coherent and have different amplitudes and phases, forming irregularly distributed granular patterns at various points in space—laser speckle. As a random process, laser speckle is an objective physical phenomenon that must exist with the use of lasers. Laser speckle not only causes energy loss, but also becomes the main factor that limi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/48G02B26/08
CPCG02B26/0858G02B27/48
Inventor 朱金通刘华
Owner WUXI MILEWAVE PHOTONICS TECH CO LTD
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