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Laser light spot active area testing arrangement

Inactive Publication Date: 2005-02-02
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

and a lot of work
When the spatial distribution of the laser beam is not nearly Gaussian, the functional expression of the spatial distribution of the laser beam cannot be determined, and the effective area cannot be calculated

Method used

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  • Laser light spot active area testing arrangement
  • Laser light spot active area testing arrangement
  • Laser light spot active area testing arrangement

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Experimental program
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Effect test

Embodiment Construction

[0030] The device of the present invention is composed of a CCD imaging measurement system 1 and a computer 3, and an optical cable 2 is used for photoelectric signal coupling between the two. The purpose of coupling with optical cables is to prevent messy signals from entering the computer and preventing the computer from being interfered. After the test image enters the computer, after the computer performs calculation and analysis, the test result of the effective area is displayed on the display 4, or printed by the printer 5.

[0031] Said CCD imaging measurement system is a SIZE512×512 full-frame CCD device. The pixel size is 512×512, the pixel size is 24μm×24μm, the image resolution is 12Bit, the dynamic range is >3000, and the imaging area is 12.3mm×12.3mm. Other types of area array CCD imaging systems can also be used. The smaller the image resolution, the better. The CCD imaging system completes the image capture and storage of the light beam. After computer proc...

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Abstract

The effective laser spot area measuring mechanism consists of CCD imaging measurement system and computer with optical cable in between for photoelectronic signal coupling. The CCD imaging measurement system is a planar array CCD imaging system, and the computer has 64-bit graphic card, display, printer and software installed for calculating effective laser spot area. The software runs in Chinese Windows95 or upper environment and matches with MATLAB as auxiliary tool platform. The mechanism of the present invention has the advantages of high measurement precision and simple operation.

Description

technical field [0001] The invention relates to a laser spot, in particular to a device for testing the effective area of ​​a laser spot. Background technique [0002] When testing the laser damage threshold of optical components and materials, it is first necessary to accurately measure the effective area of ​​the laser beam hitting the optical sample under test. [0003] Existing technologies: For example, in the ISO11254-1.2 laser damage threshold test method for optical surfaces, the effective area is theoretically defined, but no actual test device has been made. At present, the effective area is measured using the optical wedge method, that is, by means of multiple reflections of the wedge, the laser beam is divided into multiple beams, that is, the sub-beams with different propagation directions, but the energy distribution ratio is constant and the intensity change can be known. Make a list of damage spots, and measure the effective area after data processing. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/28G06T1/00
Inventor 杨镜新沈卫星庄亦飞
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI