Spatially Branched Laser Grooving With Reduced Focal Interference
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Solution Overview
Problem
Existing laser processing techniques struggle to form multiple grooves satisfactorily along a line due to interference between focusing points of branched laser light components, leading to unsatisfactory groove formation.
Innovation Solution
A laser processing device and method that utilize a spatial light modulator to branch laser light into multiple components, with a specific modulation pattern that ensures a larger distance between focusing points of adjacent branched laser light components in the direction along the line, reducing interference and allowing for independent formation of grooves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If laser light is branched into multiple components to form multiple grooves simultaneously, then work efficiency is improved, but interference between focusing points causes unsatisfactory groove formation
Solution Approach 1:
The patent segments the laser beam into multiple independent components, each forming a separate groove. By controlling the distance between focusing points of adjacent branched laser light to be larger than the focusing point distance in the width direction, each groove is formed independently without interference, thus maintaining high work efficiency while ensuring groove formation quality.
2Productivity
If the distance between focusing points of adjacent branched laser light is reduced to form grooves closer together, then productivity increases, but heat-affected zones and interference between processing points deteriorate groove quality
Solution Approach 1:
The patent optimizes the spatial arrangement parameter by setting the distance between focusing points of adjacent branched laser light in the line direction to be larger than the distance in the width direction. This parameter change allows grooves to be formed closer together along the line while maintaining sufficient separation to minimize heat-affected zone interference, thereby increasing productivity without sacrificing groove quality.
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 the reliable and independent formation of multiple grooves along a line, reducing heat-affected zones and improving work efficiency by minimizing interference between focusing points.
Implementation Method 1
a spatial light modulator including a display unit on which the laser light emitted from the laser light source is incident and modulates the laser light according to a modulation pattern displayed on the display unit
Implementation Method 2
a condensing unit configured to condense the laser light modulated by the spatial light modulator onto the object supported by the support unit
Implementation Method 3
a laser light source configured to emit the laser light
Data Source
AI summary
A laser processing device includes a support unit, a laser light source, a spatial light modulator, and a condensing unit. A modulation pattern displayed on a display unit of the spatial light modulator includes a branching pattern for branching laser light into first branched laser light components to form a first groove and second branched laser light components to form a second groove. A distance between the position of the focusing point of the first branched laser light and the position of the focusing point of the second branched laser light adjacent to each other in a direction along the line is larger than a distance between the position of the focusing point of the first branched laser light and the position of the focusing point of the second branched laser light in the width direction of the first groove and the second groove.