Laser welding beam shaping optimization device

Abstract

The invention discloses a laser welding beam shaping optimization device which comprises a collimating lens group, a shaping lens group and a focus lens group. The collimating lens group is used for enabling a laser light emitted by a laser to become a parallel light, and emitting the parallel light to the shaping lens group; the shaping lens group is used for homogenizing a collimating gauss beam, modulating the light beam in gaussian distribution into a light beam with evenly distributed energy, and emitting the modulated light beam to the focus lens group; the focus lens group is used for gathering the modulated light onto a surface to be welded; the focus lens group can compensate the homogenized light beam, so that the focus light beam at a final focus state is more even; and meanwhile, the focus lens group has an adjustable function so as to be capable of changing the size of a laser spot. According to the laser welding beam shaping optimization device provided by the invention,the light spot can be flatly shaped, and the size of the light spot is adjustable.

Description

technical field [0001] The invention relates to the field of laser semiconductor welding processing, in particular to a laser welding beam shaping optimization device. Background technique [0002] At present, laser welding has gradually replaced the traditional welding method. Laser welding is more environmentally friendly, and it is non-contact welding. Laser soldering uses laser as a heat source. The ball is melted and solidified to achieve the process effect of connection, conduction, and reinforcement. The current semiconductor laser is a multi-mode laser, and the output is multi-mode light, which is evenly distributed under the ideal condition of the laser focus. However, due to the influence of the laser multi-mode mode, it is often The ideal flat spot cannot be obtained, which leads to a relatively large energy density in the center of the spot and a relatively small surrounding energy density during the laser welding process. The actual effect is that the solder at ...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the prior art, and provide a laser welding beam shaping optimization device, which can carry out flat top shaping of the light spot, and optimize the beam quality, and can solve the problem that the flat top light spot is not controlled and the size of the light spot cannot be adjusted.

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