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 change beam parameter products (BPP), which is time-consuming and costly, and often damages fragile components, limiting the ability to vary BPP for 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 change BPP, then beam quality can be optimized for different processing techniques, but system complexity increases and component damage risk increases
Solution Approach 1:
The patent implements dynamic BPP control by making the optical element position adjustable along the optical axis. A translation stage or motorized positioning system enables continuous variation of the optical element's position, allowing real-time modification of beam parameters without physical component changes. This transforms a static optical system into a dynamic one that can adapt beam quality on-demand.
Solution Approach 2:
The invention changes the positional parameter of the optical element (lens or mirror) along the optical axis to vary the beam parameter product. By adjusting the distance between the optical element and the fiber end face or workpiece, the system modifies beam divergence and spot size, thereby achieving different BPP values suitable for various laser processing applications.
2Adaptability or versatility
If optical components are frequently adjusted or swapped to change BPP, then beam quality can be optimized for different processing techniques, but time consumption increases
Solution Approach 1:
The patent implements dynamic BPP control by making the optical element position adjustable along the optical axis. A translation stage or motorized positioning system enables continuous variation of the optical element's position, allowing real-time modification of beam parameters without physical component changes. This transforms a static optical system into a dynamic one that can adapt beam quality on-demand.
Solution Approach 2:
The invention replaces the mechanical process of manually swapping optical components with an automated motorized translation system. The motorized stage electronically controls the optical element position, substituting manual mechanical adjustment with automated electro-mechanical positioning, thereby eliminating time-consuming manual intervention.
3Adaptability or versatility
If optical components are frequently adjusted or swapped to change BPP, then beam quality can be optimized for different processing techniques, but component damage risk increases
Solution Approach 1:
The patent implements dynamic BPP control by making the optical element position adjustable along the optical axis. A translation stage or motorized positioning system enables continuous variation of the optical element's position, allowing real-time modification of beam parameters without physical component changes. This transforms a static optical system into a dynamic one that can adapt beam quality on-demand.
Solution Approach 2:
The invention achieves multiple beam quality states using a single optical element at different positions, rather than requiring multiple physical copies of optical components. The single lens or mirror can produce different BPP values by being positioned at different locations, effectively creating virtual copies of the component's function without physical duplication or handling of multiple fragile parts.
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 effectively.
Implementation Method 1
using refractive, diffractive, or adaptive optics to modify beam quality and intensity distribution
Implementation Method 2
using refractive, diffractive, or adaptive optics to modify beam quality and intensity distribution
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.