Medical Laser Pulse Calibration With Beam-Splitter Feedback Control
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Solution Overview
Problem
Medical laser systems face inconsistencies in laser pulse energy measurement due to factors like incident angle and manufacturing variations, affecting the accuracy of output laser pulses.
Innovation Solution
A medical laser system is equipped with an energy-sensing device, energy measurement assembly, and controller to generate feedback signals for closed-loop control, adjusting laser pulses based on detected energy levels and pulse width errors, using a calibration module and spectrum matrix to ensure accurate output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If laser pulse energy is measured with an energy sensor, then the output laser pulse characteristics can be monitored, but the measured energy may be inconsistent due to incident angle variations and manufacturing inconsistencies
Solution Approach 1:
An optical element (beam splitter) is introduced as an intermediary to direct a portion of the laser pulse to the energy sensor at a controlled angle, eliminating the need for direct measurement and reducing incident angle variations. This mediator ensures consistent measurement geometry while maintaining the primary laser beam's integrity for surgical use.
Solution Approach 2:
The system implements feedback control by continuously monitoring laser pulse energy with the sensor and using this information to adjust laser parameters in real-time. This closed-loop feedback mechanism compensates for manufacturing inconsistencies and ensures reliable, consistent energy delivery across multiple pulses.
2Manufacturing precision
If preset conditions are adjusted to compensate for manufacturing inconsistencies, then output laser pulse accuracy improves, but system complexity increases
Solution Approach 1:
The system performs self-calibration and self-adjustment using the energy sensor feedback to automatically compensate for manufacturing inconsistencies. The controller autonomously adjusts preset conditions based on real-time measurements, eliminating the need for complex manual calibration procedures and reducing overall system complexity.
Solution Approach 2:
The system dynamically adjusts laser parameters (energy, pulse duration, repetition rate) based on feedback from the energy sensor. By changing operational parameters in real-time rather than relying on precise manufacturing tolerances, the system achieves high output accuracy without requiring overly complex manufacturing and calibration processes.
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
The system achieves consistent and reliable laser pulse energy levels by dynamically adjusting laser pulses, compensating for environmental and manufacturing variations, ensuring precise medical procedures.
Implementation Method 1
an energy-sensing device configured to detect the portion of the at least one laser pulse
Data Source
AI summary
A medical laser system for outputting laser pulses includes at least one laser cavity configured to generate at least one laser pulse, a rotating mirror configured to receive and reflect the at least one laser pulse, a beam splitter configured to receive and reflect a portion of the at least one laser pulse received from the rotating mirror, an energy-sensing device configured to detect the portion of the at least one laser pulse, an energy measurement assembly configured to generate a feedback signal based on the portion of the at least one laser pulse detected by the energy-sensing device, and a controller configured to generate an electronic control pulse based on the feedback signal received from the energy measurement assembly to generate at least one adjusted laser pulse.