System and method for measuring diameter of laser beam

Abstract

The invention provides a system and a method for measuring diameter of laser beam. The system comprises an electric iris diaphragm, a laser power meter and an analysis and control device. The laser power meter comprises a power meter probe and a power meter controller, the electric iris diaphragm is put at the place to be measured, vertical to the transmission direction of the laser; the electriciris diaphragm and the power meter probe are arranged in sequence along the laser principal axis in the transmission direction of the laser; the center of the aperture of the electric iris diaphragm is aligned with the laser principal axis so as to enable the laser to pass through the aperture of the electric iris diaphragm to radiate onto the power meter probe; the analysis and control device isin electric communication with the electric iris diaphragm, receives the information of the aperture of the electric iris diaphragm and controls the change of the aperture of the electric iris diaphragm; and the analysis and control device is in electric communication with the power meter controller to receive the pass-through power of the laser measured by the power meter.

Description

technical field [0001] The invention relates to a measurement system and method, in particular to a system and method for measuring laser beam diameter. Background technique [0002] Laser beam analyzer is an indispensable testing tool in the development, production and use of lasers. This laser beam analyzer uses a computer to collect and process data. After the energy attenuation of the laser light emitted by the laser is performed, it is input into the computer by a special CCD video collection method and analyzed by special software. [0003] The structure of the laser beam analyzer mainly includes several parts such as optical quartz wedge, mirror, attenuation plate and CCD detector. The principle and use of this beam analyzer system are introduced in the reference "Liu Hui's "Laser Beam Analyzer Measurement System and Its Experimental Research" published in Science and Technology Consulting Herald, 2007, No.18". However, when using a laser beam profiler for measureme...

AI Technical Summary

Problems solved by technology

However, when using a laser beam profiler for measurement, the interference effect caused by the use of the attenuation sheet and the limitation of the size of the photosensitive surface of the CCD may lead to inaccurate measurement results

In addition, due to the low damage threshold of CCD, when the laser power is high, if the attenuation of the attenuation sheet is not enough, it is very likely to damage the CCD, so it is dangerous

Images