Scan Lens Beam Shifting to Extend Laser Optics Lifetime
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Solution Overview
Problem
Laser-induced damage to optical components in laser processing apparatuses leads to frequent and costly replacements, as existing methods fail to effectively mitigate damage caused by high-energy laser beams, resulting in material degradation and reduced component lifespan.
Innovation Solution
The apparatus employs a method to shift the scan region within the scan lens to direct laser pulses through undamaged areas, extending the component's lifespan by avoiding damaged regions and optimizing the beam path to reduce wear and tear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If laser energy is propagated continuously through the same optical components, then processing efficiency is maintained, but laser-induced damage accumulates and component lifespan decreases
Solution Approach 1:
The patent segments the optical path by introducing a removable optical component (such as a beam delivery component or optical element) that can be easily exchanged. This allows the optical path to be divided into a protected permanent portion and a replaceable sacrificial portion, resolving the contradiction by enabling frequent replacement of the damaged segment without affecting the entire system or processing efficiency
Solution Approach 2:
The patent employs a disposable or easily replaceable optical component that is intentionally designed to be replaced frequently. This sacrificial component absorbs the laser-induced damage, protecting more expensive permanent components. The low cost and ease of replacement of this component allows maintaining high processing efficiency while extending the lifespan of critical optical components
2Reliability
If optical components are replaced frequently to maintain performance, then processing quality is preserved, but downtime and operational costs increase
Solution Approach 1:
The patent implements preliminary action by pre-positioning replacement optical components in ready-to-install positions within the optical path. These spare components are prepared in advance and can be quickly swapped in when damage occurs, eliminating the need for lengthy replacement procedures and minimizing downtime while maintaining processing quality
Solution Approach 2:
The patent introduces dynamic replaceability to the optical system, allowing components to be exchanged during or between processing operations without requiring system shutdown or complex realignment procedures. This dynamic design enables quick component swapping that preserves processing quality while minimizing time loss
3Productivity
If high energy laser beams are used for processing, then processing speed and effectiveness increase, but damage to optical components accelerates
Solution Approach 1:
The patent uses a sacrificial optical component that is deliberately designed to be replaced frequently and at low cost. This component is positioned in the high-energy laser path and absorbs the damaging effects, allowing high-power laser processing to continue at full speed while the sacrificial component protects more expensive permanent optics from damage
Solution Approach 2:
The patent introduces an intermediary optical component that mediates between the high-energy laser beam and the permanent optical components. This intermediary element absorbs or dissipates the harmful laser energy, protecting the permanent components from damage while allowing the high-power processing to continue uninterrupted
Data Source
AI summary
Methods and apparatus for extending the lifetime of optical components are disclosed. A beam of laser energy directed along a beam path that intersects a scan lens, through which it can be transmitted. The beam path can be deflected within a scan region of the scan lens to process a workpiece with the laser energy transmitted by the scan lens. The scan region can be shifted to a different location within the scan lens, e.g., to delay or avoid accumulation of laser-induced damage within the scan lens, while processing a workpiece.