Laser Processing Head Coma Aberration Adjustment
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Solution Overview
Problem
In laser processing, adjusting the energy intensity distribution of laser light on a workpiece without altering the irradiation position is challenging, as changing the positional relationship between the laser incident part and the lens affects both the energy distribution and the irradiation position, potentially overlapping the laser with accessory devices.
Innovation Solution
A laser processing device with a movable laser processing head that includes a collimate lens and a collecting lens, allowing independent adjustment of the energy intensity distribution and irradiation position through controlled movement of these optical components, utilizing a first moving part to adjust the collimate lens and a second moving part to adjust the collecting lens, thereby correcting coma aberration and maintaining the irradiation position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the positional relationship between the laser incident part and the lens is changed to adjust the energy intensity distribution, then the energy intensity distribution can be optimized, but the irradiation position may overlap with accessory devices
Solution Approach 1:
By separating the adjustment functions into independent segments, the patent enables the lens position to be adjusted separately to prevent overlap with accessory devices, while the laser incident part position is adjusted independently to optimize energy distribution, thus resolving the contradiction between energy optimization and avoiding harmful overlaps.
2Manufacturing precision
If the laser incident part is moved to adjust the energy intensity distribution, then the energy density can be optimized, but additional adjustment of the irradiation position is required
Solution Approach 1:
The patent implements segmentation by providing two independent adjustment mechanisms: one for the laser incident part (to control energy density) and another for the lens (to control irradiation position). This segmentation, while adding a component, simplifies the overall adjustment process by allowing independent optimization of each parameter without requiring complex coupled adjustments.
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
Enables precise adjustment of energy intensity distribution and irradiation position on the workpiece, improving processing quality by flattening energy density and maintaining the laser's focal point, thus reducing surface roughness and avoiding overlap with accessory devices.
Implementation Method 1
a lens through which the laser light emitted from the laser incident part passes. In the laser processing device, the laser light from the laser incident part is collected by the lens to increase an energy density of the laser light
Implementation Method 2
The document JP 2014 184456 A discloses using the a condenser lens having a large radius of curvature to reduce coma aberration. The document JP 2001 347386 A discloses performing a calculation correction regarding the unavoidable coma aberration
Data Source
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AI summary
A laser processing head includes a laser irradiation part, a collimating optical system for collimating laser light from the laser irradiation part, and a collecting optical system for collecting the laser light after passing through the collimating optical system. An optical system including the collimating optical system and the collecting optical system is configured such that the laser light after passing through the collecting optical system has coma aberration. The laser processing head further includes a first moving part for moving at least one of the laser irradiation part or the collimating optical system so as to change a relative position of the collimating optical system with respect to the laser irradiation part, in a first direction orthogonal to a center axis of the laser irradiation part or the collimating optical system, and a second moving part for moving the collecting optical system so as to change a relative position of the collecting optical system with respect to the collimating optical system, in a second direction orthogonal to a center axis of the collecting optical system.