Laser Intensity Measurement Using Branch Beams During Processing
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Solution Overview
Problem
Conventional laser processing apparatuses cannot measure laser beam intensity during processing, leading to reduced productivity.
Innovation Solution
A laser intensity measuring device that splits the laser beam into branch beams, using a diffraction optical element and integrating sphere to measure intensity while processing, allowing continuous laser processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the laser beam intensity is measured by operating the output measuring means to receive the laser beam while laser processing is not being performed, then the laser beam intensity can be measured, but productivity is reduced due to alternating processing flow
Solution Approach 1:
The laser beam is divided into multiple branch beams using a diffraction optical element. One branch beam is directed to the integrating sphere for intensity measurement, while another branch beam is used for laser processing. This segmentation allows simultaneous measurement and processing, resolving the contradiction between measurement capability and productivity.
Solution Approach 2:
The system enables continuous laser processing by measuring the intensity of a branched beam while the main beam continues to process the workpiece without interruption. The measurement action becomes continuous rather than alternating, maintaining productivity while providing real-time intensity monitoring.
2Productivity
If the laser beam is split into branch beams using a diffraction optical element, then real-time intensity measurement during processing becomes possible, but device complexity increases
Solution Approach 1:
The diffraction optical element serves multiple functions: it splits the laser beam into multiple branches, enabling both measurement and processing functions from a single component. The integrating sphere also serves dual purposes by both measuring intensity and allowing passage of measurement beams. This multi-functionality reduces the need for additional separate components.
Solution Approach 2:
The integrating sphere acts as an intermediary device that receives branched laser beams for measurement while allowing the measurement process to occur without interfering with the main processing beam. It mediates between the laser source and the measurement detector, enabling non-intrusive intensity monitoring.
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 continuous laser processing with real-time intensity measurement, improving productivity and quality by ensuring appropriate beam intensity is maintained.
Implementation Method 1
a diffraction optical element configured to split a laser beam into a plurality of branch beams
Implementation Method 2
an inner wall on which the other of the plurality of branch beams impinge
Data Source
AI summary
A laser intensity measuring device includes a diffraction optical element configured to split a laser beam into a plurality of branch beams; an integrating sphere including an entrance port through which one of the laser beam or the plurality of branch beams enters the integrating sphere, an exit port through which at least one of the plurality of branch beams exits the integrating sphere, and an inner wall on which the other of the plurality of branch beams impinge; and a sensor configured to measure an intensity of the other of the plurality of branch beams reflected by the inner wall.