Optical Element Positioning for Real-Time Laser BPP Control
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Solution Overview
Problem
High-power laser systems require frequent adjustments to optical components to vary beam parameter products (BPP), which is time-consuming and costly, and can damage fragile components, limiting the ability to adapt to different processing techniques and materials.
Innovation Solution
The use of optical elements with switchable states and motorized translation to dynamically change the position of optical elements in the laser beam path, allowing for real-time variation of BPP without altering the output optical system, using refractive, diffractive, or adaptive optics to modify beam quality and intensity distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If optical components are frequently adjusted or swapped to vary beam parameter products, then beam quality and processing adaptability are improved, but system complexity and risk of component damage increase
Solution Approach 1:
The patent implements dynamic BPP control by translating the optical element along the beam propagation direction using a motorized stage. The optical element's position is continuously adjustable via electrical signals, enabling real-time BPP variation without mechanical swapping or realignment of optical components. This dynamic adjustment mechanism resolves the contradiction by providing adaptability through electronics rather than mechanical intervention.
Solution Approach 2:
The patent replaces manual mechanical adjustment and swapping of optical components with an automated motorized translation stage. The system uses electrical control signals to position the optical element precisely, substituting the need for physical intervention. This mechanical-to-electrical substitution reduces system complexity and eliminates the risks associated with fragile optical component handling while maintaining full BPP variation capability.
2Adaptability or versatility
If optical components are swapped or realigned to change beam parameters, then processing adaptability is improved, but time consumption and productivity are reduced
Solution Approach 1:
The system enables dynamic, real-time BPP adjustment during laser processing operations. The motorized translation stage can reposition the optical element instantaneously in response to control signals, allowing the system to adapt to different processing techniques without interruption or downtime. This eliminates the time-consuming manual swapping and realignment processes while maintaining full processing adaptability.
Solution Approach 2:
The patent ensures continuous laser processing operation by implementing electronic control of BPP variation. The motorized stage maintains uninterrupted beam delivery while adjusting parameters, allowing seamless transitions between different processing modes. This continuity eliminates the idle time associated with mechanical component changes, significantly improving productivity while preserving adaptability.
3Manufacturing precision
If manual adjustment of optical components is performed, then beam parameter control is achieved, but ease of operation is reduced and operator safety is compromised
Solution Approach 1:
The patent replaces manual mechanical adjustment with automated motorized control. A computer or control system sends electrical signals to the translation stage, which precisely positions the optical element to achieve the desired BPP. This eliminates the need for operators to physically handle fragile components, improving ease of operation while maintaining or enhancing precision through electronic control and feedback mechanisms.
Solution Approach 2:
The system implements self-positioning capability where the motorized translation stage automatically adjusts the optical element's position based on control signals. The system performs the adjustment function autonomously without requiring manual intervention, making operation simpler and safer while maintaining precise beam parameter control through automated feedback and positioning mechanisms.
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 and repeatable control of BPP for improved laser application performance across various processing techniques and materials, reducing the need for component swaps and realignments, and enhancing the ability to process different materials efficiently.
Implementation Method 1
The optical element may include, consist essentially of, or consist of a lens having (i) a first surface having the shape of a truncated cone, and (ii) opposite the first surface, a second surface that is substantially planar
Data Source
AI summary
In various embodiments, laser delivery systems feature one or more optical elements for receiving a radiation beam and altering the spatial power distribution thereof, a lens manipulation system for changing a position of at least one optical element within the path of the radiation beam, and a controller for controlling the lens manipulation system to achieve a target altered spatial power distribution on a workpiece.