Acousto-optic bifocal lens for laser processing and laser processing system

Abstract

The invention discloses an acousto-optic bifocal lens for laser processing and a laser processing system, and belongs to the field of laser processing. The acousto-optic bifocal lens comprises a Braggacoustic optical modulator, a focusing lens and a driving signal source, wherein the acoustic optical modulator is used for enabling a laser beam incident along an optical axis to be diffracted underthe acousto-optic interaction, and a 0-order diffraction beam and a first-order diffraction light beam are output, wherein the 0-order diffraction beam is consistent with the incident laser beam in direction, and the deflection angle of the first-order diffraction light beam is theta (theta is not equal to 0); the focusing lens is coaxial with the acoustic optical modulator, is positioned behindthe acoustic optical modulator, and is used for focusing the two light beams output by the acoustic optical modulator on the surface to be processed; and the driving signal source is connected with the acoustic optical modulator and is used for injecting a radio frequency signal into the acoustic optical modulator so as to control the acousto-optic interaction in the acoustic optical modulator, thereby controlling the energy distribution of the two light beams and / or controlling the distance between two focuses after the two light beams are focused. According to the acousto-optic bifocal lens,the energy distribution of two light beams obtained by light splitting and the distance between two focuses can be accurately and flexibly controlled, and a high-quality processing light beam is output.

Description

technical field [0001] The invention belongs to the field of laser processing, and more specifically relates to an acousto-optic bifocal lens and a laser processing system for laser processing. Background technique [0002] With the continuous development of laser technology and applications, laser processing has become an important part of advanced manufacturing technology. Compared with the traditional single-focus laser processing system, the dual-focus processing system can adjust the energy distribution and the area of ​​action. In practical applications It has higher processing efficiency and quality, so its application is becoming more and more extensive. [0003] The dual-focus processing system promotes the development of dual-beam welding, improves the reliability and stability of the welding process, reduces thermal stress and welding porosity, and is suitable for non-metallic welding, high-speed welding and hybrid welding. Specifically, tandem double-beam weldin...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects and improvement needs of the prior art, the present invention provides an acousto-optic bifocal lens and a laser processing system for laser processing. The resulting complex system, high cost and easy to introduce errors

Images