Dynamic beam deflection and shaping for laser processing

Abstract

The invention relates to a laser processing system and a laser processing head for directing a laser beam. The laser processing head uses an actuator engaged with a transmission fiber end to deflect the fiber end relative to an optical axis. The laser beam from the end of the optical fiber is collimated by a collimator and then focused at a focus outside of the collimator by a focusing lens disposed in the head. The focal point of the laser beam deflects from the optical axis in accordance with deflection of the fiber end. The fiber end and the actuator are housed in a sealed module. Deflection of the laser beam may be sensed by reflecting a portion of the laser beam to the sensing element, so that a control system may monitor and control movement of the fiber end.

Description

[0001] Cross References to Related Applications [0002] This application is a continuation-in-part of US Application No. 17 / 001,920, filed August 25, 2020, and entitled "High Leverage Beam Wobbling," which is incorporated herein by reference. technical field [0003] The present disclosure generally relates to optical systems and related art for uses of optical systems. More particularly, but not exclusively, the present disclosure relates to systems and methods for inducing wobbles in laser beams. Background technique [0004] Unless otherwise indicated herein, the materials described herein are not prior art to the claims in this application and are not admitted to be prior art by inclusion in this section. [0005] In certain applications, such as laser cutting, manufacturing, welding, etc., the laser beam can be moved relative to the article at which the laser beam is directed. For example, the laser beam moves relative to the article so that the laser beam can contac...

AI Technical Summary

Problems solved by technology

However, using a scanner to generate wobble will superimpose the wobble onto the sensor beam path and this may affect the sensor used for these systems and may affect the accuracy of the weld path determined by the scanner

Beam swinging can also be achieved using fast oscillating deflecting mirrors, but this can lead to lengthening of the beam path and tends to be rather expensive to implement

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