Beam Splitter Camera PSD Detector for Laser Alignment
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Solution Overview
Problem
Position sensitive detectors (PSDs) alone cannot accurately determine beam alignment in high energy laser systems with multiple component beams, as misalignment of one beam can incorrectly steer the entire beam ensemble, and they lack the ability to provide a beam profile, while cameras provide profiles but at the cost of speed in diagnostics and alignment.
Innovation Solution
A system combining a beam splitter, camera, and PSD, where the beam splitter splits the beam into two portions, the camera detects the image profile of one portion, and the PSD detects the position of the other, allowing for high-speed, accurate beam centroid tracking and profile analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a PSD alone is used to detect beam position, then high speed feedback is achieved, but measurement precision deteriorates due to inability to distinguish between correct and errant beam components
Solution Approach 1:
The beam is segmented into multiple spatial regions using a beam splitter and optical elements, allowing the PSD to detect position information from specific beam components while the camera captures profiles from other components. This segmentation enables the system to distinguish between correct and errant beam components, resolving the contradiction between fast feedback and precise measurement.
2Measurement precision
If a camera alone is used to detect beam profile, then measurement precision improves, but speed deteriorates due to lower bandwidth
Solution Approach 1:
The detection system is segmented into two parallel paths: one using a camera for high-precision beam profile measurement and another using a PSD for high-speed position detection. The beam splitter directs different beam portions to each detector, allowing both measurement types to operate simultaneously without compromising speed or precision.
3Speed
If a PSD is used to detect beam centroid, then speed is improved, but reliability deteriorates due to incorrect steering when multiple beam components are misaligned
Solution Approach 1:
The beam splitter acts as an intermediary element that separates the beam into distinct portions, allowing the PSD to detect position information from specific components while the camera provides contextual information about beam profiles. This intermediary enables the system to maintain both fast response and reliable alignment detection by preventing the PSD from being confused by misaligned components.
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 rapid correction of beam alignment issues in high energy laser systems by distinguishing between correct and errant beam components, preventing incorrect steering and ensuring safety thresholds are not exceeded, thus maintaining efficient operation.
Implementation Method 1
a beam splitter, camera, and a position sensitive detector (PSD). The beam splitter splits a beam into a first beam portion and a second beam portion
Data Source
AI summary
A system includes a beam splitter, camera, and a position sensitive detector (PSD). The beam splitter splits a beam ensemble into a first beam portion and a second beam portion. The camera PSD detects an image profile of the first beam portion. The PSD detects a position of the second beam portion.