Method of improving laser processing efficiency by optimizing light beam quality

Abstract

The invention discloses a method of improving laser processing efficiency by optimizing light beam quality, and relates to the technology application field of optical systems and laser processing systems. The method is characterized in that light beams of an Nd: YAG laser device are optimized and shaped from two aspects, wherein a step A is that a shaping system of a Galileo-type aspherical mirror set is used for optimizing and shaping round laser spots in a Gaussian distribution pattern into round laser spots in an ultra Gaussian flat-topped distribution pattern; a step B is that the round laser spots in the ultra Gaussian flat-topped distribution pattern in the step A pass through a spot conversion device and are converted into linear spots in the ultra Gaussian flat-topped distribution pattern under the action of the spot conversion device. Laser beams obtained through the method are uniform in energy distribution and optimized in quality, and energy conversion efficiency of laser is improved. The method has the advantages that the technique is simple, and since two sets of devices are both composed of various lenses, cost and power consumption are low, and the method is easy to implement.

Description

technical field [0001] The invention relates to the technical application field of optical systems and laser processing systems, in particular to a new method for optimizing the quality of laser beams, which is suitable for high-power laser processing systems. Background technique [0002] Usually the spatial intensity distribution of the laser beam emitted by the laser is a Gaussian distribution, that is, a Gaussian beam. In the field of laser processing, the intensity of the Gaussian beam is too concentrated in the central part, and the non-uniform distribution of energy will cause the local temperature to rise and destroy the material properties. Therefore, the uneven energy distribution of the laser beam limits its application in the processing field. In many cases, the Gaussian beam can be converted into a flat-hat beam with uniform energy distribution to eliminate adverse effects. [0003] With the development of production, new requirements are constantly put forward...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem that the energy distribution of the ordinary laser beam is not uniform and the quality of the laser beam is poor, so that the local temperature of the material rises too fast during the laser processing and destroys the characteristics of the material itself, and provides a method for optimizing the quality of the laser beam. new method

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