Laser Beam Calibration Verification for High-Speed Motion Accuracy
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Solution Overview
Problem
Existing laser processing systems, particularly those with high-speed motion capabilities, lack accurate and efficient methods for analyzing the quality and dynamic accuracy of laser focal spots, which are crucial for precise laser processing.
Innovation Solution
A method and system utilizing pin-hole sensors positioned at predetermined locations within the field of view of a laser beam to verify the commanded position and repeatability of the laser beam, measuring spot size diameter, and using a data acquisition device to analyze laser beam characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-speed motion capability is implemented in laser processing systems, then productivity is improved, but measurement precision of laser focal spot position deteriorates
Solution Approach 1:
A pinhole sensor is introduced as an intermediary device between the laser beam and the measurement system. The pinhole sensor converts the laser beam position into a detectable signal, enabling accurate measurement of focal spot position even during high-speed motion. The sensor is positioned at a predetermined location where it can detect when the laser beam passes through the pinhole, providing precise positional data without interfering with the high-speed processing capability.
2Manufacturing precision
If accurate verification of laser beam positioning is implemented, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The pinhole sensor system is designed to be self-contained and automatically integrated into the laser processing system. The sensor detects laser beam position through simple optical interaction with the pinhole, and the system automatically records and analyzes the positional data without requiring complex external verification equipment or manual measurement procedures.
Solution Approach 2:
The invention replaces complex mechanical measurement systems with an optical detection approach. Instead of using mechanical probes or complex optical assemblies to measure laser position, a simple pinhole combined with a photodetector sensor provides accurate positional verification through optical interaction, significantly reducing device complexity.
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 verification of laser beam positioning and repeatability, ensuring accurate and repeatable laser processing by measuring positional accuracy and precision repeatability of high-speed laser motion systems.
Implementation Method 1
positioning a plurality of pin-hole sensors within a field of view of the laser, wherein each of the pin-hole sensors is positioned at a predetermined location; registering the predetermined location of each pin-hole sensor with the high-speed laser motion systems; directing the laser beam to the predetermined locations of each pin-hole sensor; receiving a signal from each pin-hole sensor to verify positional accuracy of the laser beam
Data Source
AI summary
Systems and methods for analyzing laser beam characteristics in high-speed laser motion systems, wherein the high-speed laser motion systems include a laser for generating the laser beam and a build plane positioned at a predetermined location relative to the laser beam, comprising positioning a plurality of pin-hole sensors within a field of view of the laser, wherein each of the pin-hole sensors is positioned at a predetermined location; registering the predetermined location of each pin-hole sensor with the high-speed laser motion systems; directing the laser beam to the predetermined locations of each pin-hole sensor; receiving a signal from each pin-hole sensor to verify positional accuracy of the laser beam; and repeatedly redirecting the laser beam to the predetermined location of each pin-hole sensor to measure precision repeatability.