Device capable of automatically diagnosing and correcting divergence angle and beam quality of laser beam

Abstract

The invention relates to a device capable of automatically diagnosing and correcting divergence angle and beam quality of a laser beam. The device is used for extracting an erosion image formed by a laser beam to a refractory material or a processing mark image formed by the laser on a processed material, automatically diagnosing the divergence angle and the beam quality of the laser beam, in particular a laser beam for processing, and correcting the divergence angle and the beam quality of the laser beam by utilizing an optical deformation device, such as a deformable mirror, so that the laser equipment can be assisted to keep the excellent and stable working state, and the processing capacity and efficiency can be furthest improved.

Description

technical field [0001] The invention relates to a device for automatically diagnosing and correcting laser beam divergence angle and beam quality. In particular, it is a device for automatically diagnosing and correcting the divergence angle and beam quality of laser beams in the field of laser cutting. Background technique [0002] Since the emergence of laser processing technology in the 1970s, laser processing technology has been applied in many fields, and the development of modern production has further expanded the demand for laser processing equipment. According to statistics, in 2001, the global laser equipment sales amounted to 2.8 billion US dollars. In 2003, the global laser equipment sales reached 4.318 billion US dollars, and by 2007 and 2008, the amount was further increased to 6.132 and 6.360 billion US dollars. CO2 lasers (10.6 μm) and Nd: YAG lasers are the two most widely used lasers. From the perspective of the application of foreign laser processing sys...

AI Technical Summary

Problems solved by technology

[0005] At present, the beam quality of high-power lasers is difficult to achieve ideal, and the pursuit of high-power lasers is generally at the expense of beam quality

The unsatisfactory beam quality leads to a decrease in the focusing performance of the laser. After focusing, the focal spot size formed after focusing is relatively large and the energy density is relatively low. As a result, the processing quality and processing capacity of the laser equipment are affected, and it is difficult to exert the expected performance.

[0006] In addition, due to the certain divergence angle of the laser beam, some key technologies in the design and application of laser processing equipment, such as flying optical path technology, automatic measurement and control technology of focus position, etc., are affected and difficult to realize

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