Laser Engraving Galvo Head Cooling for Beam Stability
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Solution Overview
Problem
Existing tunable lasers for laser engraving lack stability and precision due to external temperature fluctuations, internal heat loads, and vibrations, which affect micrometer accuracy and beam power control.
Innovation Solution
A laser system with a galvo head and beam dump that incorporates a local cooling system to stabilize the galvo head and beam dump, ensuring minimal intensity fluctuations and maintaining high micrometer accuracy across varying power ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a beam dump is used to control laser power, then power tunability is improved, but heat generation worsens and degrades micrometer accuracy
Solution Approach 1:
The patent converts the harmful heat generated by the beam dump into a controllable parameter by implementing active cooling systems. The cooling system transforms the previously detrimental thermal effect into a manageable condition, allowing the beam dump to maintain its power control function while preventing accuracy degradation through temperature management.
Solution Approach 2:
The patent changes the thermal parameter of the beam dump by introducing cooling mechanisms that actively manage temperature. This parameter change allows the system to maintain power tunability while preventing the heat-induced accuracy loss, effectively decoupling the two previously conflicting characteristics.
2Productivity
If laser power is increased for engraving, then productivity is improved, but internal heat load worsens and causes beam drift
Solution Approach 1:
The patent converts the harmful internal heat load generated during high-power operation into a manageable condition through active cooling systems. The cooling mechanisms transform the previously detrimental thermal effects into controllable parameters, allowing high-power engraving to proceed without compromising beam stability or causing drift.
Solution Approach 2:
The patent implements feedback control through temperature sensors and cooling systems that continuously monitor and adjust thermal conditions. This feedback mechanism allows the system to maintain beam stability even at high power levels by dynamically compensating for heat-generated drift through real-time adjustments.
3Stability of the object's composition
If external temperature control is improved, then beam stability is improved, but device complexity worsens
Solution Approach 1:
The patent applies local quality by implementing cooling specifically at critical locations where heat generation occurs, such as the beam dump and laser cavity, rather than cooling the entire system uniformly. This localized approach achieves beam stability while minimizing the overall complexity and resource requirements of the cooling system.
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 cooling system effectively stabilizes the laser beam, reducing intensity fluctuations and maintaining high micrometer accuracy, thus enabling precise and stable laser engraving with tunable power.
Implementation Method 1
there is provided according to the present invention a cooling system, for example in the form of a cooling circuit which is adapted to cool locally at least a portion of the galvo head and a portion of the beam dump
Implementation Method 2
such beam dumps are for absorbing a part of the laser beam such that it is possible to tune the power ranges which come out of the laser
Implementation Method 3
there is provided a laser mirror for deflecting laser beams, for displaying text, laser animations and or for laser engraving
Data Source
AI summary
A laser for laser engraving and a method of assembling a laser for laser engraving. The laser has a housing, a galvo head for manipulating a laser beam in order to execute laser engraving with the laser beam, and a beam dump for dumping a part of the laser beam in order to control the power of the laser. Further, a cooling system is provided that is adapted to cool locally at least a portion of the galvo head and at least a portion of the beam dump.