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

A technology of laser beam and beam quality, used in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of automatic measurement and control technology, difficult to achieve ideal beam quality of high-power lasers, and large focal spot size.

Active Publication Date: 2012-09-12
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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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 a

Method used

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

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[0012] Such as figure 1 As shown, adjust the optical parts so that the beam output by the laser is reflected by the first auxiliary reflector 1, the second auxiliary reflector 2, the first deformable mirror 3, the third auxiliary reflector 4, and the second deformable mirror 5. The workpiece 9 is cut through the focusing lens 6, and the laser cutting information is recorded by the CCD. The arc light generated during the processing will submerge the image signal. At this time, the auxiliary light source 8 can be used to illuminate the workpiece: the auxiliary light source 8 can be a wide-spectrum LED light source, and a narrow-band filter is placed in front of the diagnostic device 7. Stray light rays such as arc light reflected on the 9 can be filtered out when entering the diagnostic device 7 . According to the incision information picture obtained by multiple records, the computer calculates the width (or depth) of the incision. The calculation method of the incision width ...

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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...

Claims

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Application Information

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IPC IPC(8): B23K26/36B23K26/06
Inventor 黄林海王海英周虹
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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