Apparatus for measuring quality of laser beam

A laser beam quality and measurement device technology, applied in the laser field, can solve problems such as the difficulty in measuring the quality of high-energy laser beams and the inability to measure pulsed laser beams instantaneously

Inactive Publication Date: 2006-07-12
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that the above-mentioned prior art cannot achieve instantaneous measurement of the pulsed laser beam, and there are certain difficulties in the measurement of the quality of the high-energy laser beam. A kind of laser beam quality measurement device is provided, which should not only Gaussian beams can be measured, and the beam quality of non-Gaussian beams can be evaluated by the method of power ratio in the bucket. The present invention should also have the characteristics of simple structure, practicality and stability

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  • Apparatus for measuring quality of laser beam
  • Apparatus for measuring quality of laser beam
  • Apparatus for measuring quality of laser beam

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[0064] specific implementation

[0065] Below by embodiment the present invention will be further described, but should not limit protection scope of the present invention with this.

[0066] see first figure 1 As can be seen from the figure, the laser beam quality measuring device of the present invention comprises a focusing lens 1, an attenuation sheet 5, a CCD6 for collecting light spots and a computer 8 with a high-speed acquisition card 7, and its feature is that the attenuation sheet 5 is a diffuse scattering There is a light splitting device 2 between the focusing lens 1 and the diffuse scattering plate 5, the light splitting device 2 is composed of a first flat plate 3 and a second flat plate 4 placed in the optical path at 45° to the optical path, the first flat plate 3 There is a dislocation m with the second flat plate 4, wherein the reflectivity of the inner surface of the first flat plate 3 is 100%, the value range of the reflectivity of the inner surface of th...

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Abstract

The quality measurement device for laser beam comprises: a focusing lens, an attenuation sheet of a diffuse scattering board, a CCD to collect light spot, a computer with high-speed collection card, and a light splitter contained a first plate with inner surface of 100% reflectivity and a second plate with inner surface of 90~99% reflectivity both 45Deg parallel laid in light path. Wherein, there is a malposition m between two plates and an antireflection coating on outer surface of the second plate. This invention can measure accurately for Gauss beam or non-Gauss beam with power-in-barrel ratio method, and has simple structure with well stability.

Description

technical field [0001] The invention relates to laser, in particular to a laser beam quality measurement device, which is applicable to the repetition rate and beam quality measurement of high-energy lasers. Background technique [0002] In the measurement and evaluation method of laser beam quality, the M of Gaussian beam 2 The factor evaluation method is a very useful and common beam quality evaluation method at present: [0003] [0004] For non-Gaussian beams, the method of power ratio in the bucket is generally used for evaluation: [0005] PIB = ∫ - b b | E | ( r , z ) | ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J1/00
Inventor 于永爱唐前进张玲玲胡企铨
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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