A uniform line spot optical path system based on multi-faceted prism ultra-high-speed uniform scanning

Abstract

The invention provides a multi-faceted prism ultrahigh uniform-speed scanning-based uniform-speed linear light spot optical path system. The system is composed of an off-axis parabolic mirror, an off-axis parabolic cylindrical mirror, an oblique multi-faceted prism, an oblique cylindrical parabolic mirror and an off-axis parabolic cylindrical mirror; the system is suitable for optical fiber output-class lasers with a wide power range and wide-range lasers such as CO2 lasers. With the system adopted, an elongated linear light spot of which the energy distribution is basically uniform can be obtained, the transmission directions of focusing beams being consistent, and the positions of focusing light spots being basically coplanar; the problem of the generation of a softened layer which is caused by light spot superposition in laser quenching, long interval time and extremely short cooling time can be alleviated or eliminated, and hardening strength can be ensured; the length of the obtained linear light spot can be hundreds of millimeters, and the energy distribution of the obtained linear light spot is uniform; and the scanning speed of the multi-faceted prism is ultra high. The system can be applied to high-speed large-area laser quenching, laser cladding and laser cleaning of two-dimensional planes or three-dimensional hook surfaces with focal depth ensured.

Description

[0001] Technical field: [0002] The invention relates to an optical path system based on multi-faceted prism ultra-high and constant-speed scanning for large-range power and large-range lasers, in particular to an optical path system based on multi-faceted prism ultra-high and constant-speed scanning for uniform line spot light. [0003] Background technique: [0004] In the laser processing industry, laser quenching uses a focused laser beam to rapidly heat the surface of steel materials to cause phase transformation to form a martensitic hardened layer; laser cladding adds cladding materials to the surface of the substrate and uses high energy The high-density laser beam makes it fused with the thin layer on the surface of the substrate, forming a metallurgically-bonded cladding layer on the surface of the substrate; laser cleaning is an efficient and fast removal of rust and pollutants on the surface of the material, which plays a role The role of cleaning the surface. [...

AI Technical Summary

Problems solved by technology

[0011] In order to overcome the fact that the existing laser quenching, laser cladding and laser cleaning optical paths cannot effectively perform large-area high-speed processing, and taking into account the characteristics of laser quenching, the present invention provides a scanning line spot that can obtain uniform energy distribution over hundreds of millimeters. Technical solutions for large-area laser hardening, laser cladding and laser cleaning:

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