Adjustable Optical Elements 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 often leads to damage of fragile components, limiting the ability to adapt to different processing techniques and materials.
Innovation Solution
The use of optical elements with switchable states, such as refractive and diffractive optics, that can be dynamically positioned within the laser beam path to modify beam quality and BPP, allowing for real-time adjustments without altering the output optical system, using motorized translation to achieve desired beam profiles and BPP variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If optical components are frequently swapped and realigned to vary BPP, then beam quality can be adjusted for different processing techniques, but system complexity increases and component damage risk increases
Solution Approach 1:
The patent applies dynamics by making the optical element position adjustable rather than fixed. The optical element can be dynamically repositioned along the optical axis to different locations, including positions inside and outside the focal point of the focusing lens, to achieve different BPP values without swapping components. This dynamic positioning capability allows the same optical system to adapt to different processing requirements.
Solution Approach 2:
The patent changes the position parameter of the optical element along the optical axis to vary the BPP. By adjusting the axial position of the optical element relative to the focusing lens, the system achieves different beam parameter products suitable for various processing techniques such as welding, cutting, and drilling, without modifying the optical components themselves.
2Adaptability or versatility
If optical components are frequently swapped and realigned to vary BPP, then beam quality can be adjusted for different materials, but time consumption increases
Solution Approach 1:
The system uses dynamic positioning of the optical element along the optical axis to adjust BPP in real-time. Instead of time-consuming component swaps, the optical element can be quickly repositioned to different axial locations to match different processing requirements for various materials and techniques, significantly reducing adjustment time.
Solution Approach 2:
A single optical element serves multiple functions by being positioned at different locations along the optical axis. The same element can produce different BPP values suitable for welding, cutting, drilling, and other processing techniques on different materials, eliminating the need for multiple specialized optical components.
3Adaptability or versatility
If optical components are frequently swapped and realigned to vary BPP, then beam quality can be adjusted, but risk of component damage increases
Solution Approach 1:
The optical element is designed to be dynamically repositionable along the optical axis without removal from the system. This eliminates the mechanical handling and realignment operations that typically cause damage to fragile optical components, thereby improving reliability and reducing the risk of component failure.
Solution Approach 2:
The patent uses the position of the optical element as an intermediary parameter to achieve BPP variation. Instead of physically swapping components, the system mediates the change through positional adjustment, which is a less invasive operation that preserves component integrity and reduces damage risk.
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, improving laser application performance across various processing techniques and materials, reducing the need for component swaps and realignments, and enhancing the ability to vary beam quality in applications like welding and cutting.
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
Implementation Method 2
The use of optical elements with switchable states, such as refractive and diffractive optics, that can be dynamically positioned within the laser beam path to modify beam quality and BPP
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.