A full-angle evaluation and characterization method of laser spot size

A laser spot and full-angle technology, applied in photometry, optical radiation measurement, testing optical properties, etc., can solve problems that cannot reflect the quality of laser beams scientifically and comprehensively, and achieve the effect of scientific and comprehensive spatial characteristics

Active Publication Date: 2020-12-01
途格科技(广东)有限公司
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Problems solved by technology

[0003] At present, the characterization of the laser spot size is based on the Cartesian coordinate system to obtain the spot size in the X and Y directions. Since the laser spot output by the laser is not always symmetrical in actual conditions, the X and Y directions simply using the beam parameters cannot Scientifically and comprehensively reflect the quality of the laser beam

Method used

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  • A full-angle evaluation and characterization method of laser spot size
  • A full-angle evaluation and characterization method of laser spot size
  • A full-angle evaluation and characterization method of laser spot size

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Embodiment 1

[0023] Embodiment 1, a full-angle evaluation and characterization method of laser spot size.

[0024] as attached figure 1 And attached figure 2 As shown, a kind of laser spot size all-angle evaluation and characterization method provided by the present invention comprises the following steps:

[0025] Step 1: Obtain an image with a width W (number of pixels), a length H (number of pixels) and a laser spot; there is no background noise in the image, and no saturated pixels, and the upper left of the image is The corner is the origin O, the horizontal direction to the right is the positive direction of the x-axis, and the vertical downward direction is the positive direction of the y-axis to establish a rectangular coordinate system xOy;

[0026] Step 2: extract the coordinate value (x a ,y b ) and the corresponding light intensity value I(x a ,y b ), then the centroid coordinates of the laser spot (x c ,y c ) and the first-order moment of light intensity are shown in ...

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Abstract

The invention discloses a laser spot size full-angle evaluation and characterization method. By constructing a rectangular coordinate system taking a spot centroid position as the origin, laser spot sizes in different angle theta directions of the origin are solved according to a relationship between laser spot sizes and a light intensity second-order moment, thereby realizing the characterization of the laser spot sizes in a direction forming an arbitrary angle with the horizontal direction, and scientifically and comprehensively reflecting the spatial features of the laser spot.

Description

technical field [0001] The invention relates to a full-angle evaluation and characterization method of laser spot size, belonging to the technical field of photoelectric testing. Background technique [0002] In the design, manufacture and application of lasers, the evaluation of its performance is particularly important, especially the beam space performance parameters such as beam divergence angle, light field distribution, beam waist spot size, beam width product and beam limit magnification diffraction factor M 2 etc. The acquisition of these spatial performance parameters can be deduced on the basis of the laser spot size, so it is particularly critical to scientifically and comprehensively evaluate the laser spot size. [0003] At present, the characterization of the laser spot size is based on the Cartesian coordinate system to obtain the spot size in the X and Y directions. Since the laser spot output by the laser is not always symmetrical in actual conditions, the X...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/00G01J1/00G01M11/02
CPCG01B11/00G01J1/00G01M11/02
Inventor 王菲张思博李玉瑶桂阳
Owner 途格科技(广东)有限公司
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