Oscillating Optical Element for Laser Beam Spot Shaping
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Solution Overview
Problem
Existing beam treatment devices face challenges in achieving high-quality treatment of workpieces, particularly with high-power laser beams, due to the need for additional optical components within the beam path, which can be disadvantageous and limit the adjustment of beam spot diameter and shape.
Innovation Solution
An optical device that induces oscillation of the focal point in multiple directions using exciter means, allowing for a beam spot with an increased diameter and adjustable Beam Parameter Product (BPP) without requiring additional optical components in the beam path, achieved through a control unit controlling exciter units to create predefined focal point oscillations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If additional optical components such as lenses or transport fibers are used to adjust beam spot diameter and shape, then beam quality can be improved, but device complexity increases and this becomes disadvantageous for high power laser beams
Solution Approach 1:
The patent changes the parameters of the existing optical components by dynamically adjusting their position and orientation through exciter means. By oscillating the optical element in multiple directions, the beam spot diameter and shape are varied without adding new optical components, thus improving beam quality while avoiding increased device complexity
Solution Approach 2:
The patent introduces dynamic adjustment capabilities by using exciter means to oscillate the optical element in multiple directions. This dynamic positioning allows the beam parameters to be continuously adjusted during operation, enabling beam quality optimization without requiring additional static optical components that would increase device complexity
2Manufacturing precision
If additional optical components are introduced to shape the beam, then beam spot diameter can be adjusted, but energy loss increases and reliability decreases
Solution Approach 1:
The patent makes the existing optical element perform multiple functions by oscillating it in multiple directions. The same optical element that focuses the beam is also used to adjust beam spot diameter and shape through its oscillatory motion, eliminating the need for additional optical components and thereby improving reliability while maintaining beam spot adjustment capability
3Manufacturing precision
If the beam spot diameter is increased to improve cutting quality, then energy input into the cutting edge is enhanced, but the Beam Parameter Product (BPP) becomes harder to control
Solution Approach 1:
The patent uses dynamic oscillation of the optical element to continuously adjust the beam spot diameter and BPP during operation. By controlling the amplitude and frequency of oscillation in multiple directions, the system can adaptively optimize both cutting quality and BPP control for different material thicknesses and cutting conditions
Solution Approach 2:
The patent employs periodic oscillation of the optical element to modulate the beam spot parameters. The periodic motion allows the beam to sample different spot diameters and intensities over time, achieving improved cutting quality through enhanced energy input while maintaining controllable BPP through regulated oscillation parameters
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables improved energy input into the cutting edge, resulting in enhanced cutting quality and flexibility in adjusting beam spot diameter and intensity distribution, suitable for various material thicknesses and treatment directions.
Implementation Method 1
an exciter means functionally connected to the optical element for inducing an oscillation of the focal point in at least one of an x direction and a y direction
Data Source
AI summary
A an optical device for shaping an electromagnetic wave beam and a use thereof, a beam treatment device and a use thereof, and a beam treatment method are provided. The optical device has an optical element positioned within beam propagation direction, and an exciter means functionally connected to the optical element for inducing an oscillation of the focal point in at least one of an x direction and any direction of a plane perpendicular to the beam propagation direction along a focal point oscillation path.