Laser scanning cutting optical system based on four rotary optical wedges

Abstract

The invention discloses a laser scanning cutting optical system based on four rotary optical wedges. The laser scanning cutting optical system comprises an aberration eliminating collimating lens set,a first round-wedge-shaped lens, a second round-wedge-shaped lens, a third round-wedge-shaped lens, a fourth round-wedge-shaped lens and an aberration eliminating focusing lens set. The wedge-shapedface of the second round-wedge-shaped lens deviates from or is opposite to the wedge-shaped face of the first round-wedge-shaped lens. The wedge-shaped face of the third round-wedge-shaped lens is opposite to the wedge-shaped face of the fourth round-wedge-shaped lens. The aberration eliminating collimating lens set, the first round-wedge-shaped lens, the second round-wedge-shaped lens, the thirdround-wedge-shaped lens, the fourth round-wedge-shaped lens and the aberration eliminating focusing lens set are in shapes of cylinders coaxial with respect to the central axis, the first round-wedge-shaped lens, the second round-wedge-shaped lens, the third round-wedge-shaped lens and the fourth round-wedge-shaped lens can rotate around the central axis. The laser scanning cutting optical systembased on four rotary optical wedges is suitable for high-power fiber laser cutting application, can remarkably improve the cutting speed and quality of medium-thickness boards and effectively improvesthe perpendicularity of the cutting cross sections and board surfaces of the boards.

Description

technical field [0001] The invention relates to the technical field of high-power laser cutting, and more specifically, the invention relates to an optical system based on rotating four-wedge laser scanning and cutting. Background technique [0002] Laser processing technology covers various laser processing technologies such as laser cutting, welding, quenching, drilling, micromachining, etc., and utilizes the basic characteristics of the interaction between laser and matter. Due to the advantages of non-contact between laser beam and processing materials, processing speed and quality, laser processing technology is an irreplaceable high-tech. [0003] At present, laser cutting occupies the main position of the entire laser processing industry, among which fiber laser cutting is the most important. In addition to the good beam quality of fiber lasers, the market share of fiber lasers has become increasingly prominent due to the flexibility of fibers and good coupling outpu...

AI Technical Summary

Problems solved by technology

[0006] In addition, although the defocus cutting process can meet the needs of medium and thick plates, it can also achieve a relatively acceptable cutting section. However, due to the divergence of the beam after defocusing, when cutting with cutting gas or auxiliary gas, the cutting section of the plate usually appears to be different. The phenomenon that the board surface is not vertical has a large bevel angle, which has certain limitations for the market where laser cutting requirements are getting higher and higher.

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