Multi-probe Laser Calibration Device for Pulse Energy
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Solution Overview
Problem
Current methods for calibrating laser devices, particularly for laser surgery, are time-consuming and labor-intensive when determining the pulse energy required for precise tissue ablation, especially in human cornea treatments, as they often involve single-point measurements and manual handling of test surfaces.
Innovation Solution
A test device with a multi-probe measuring head is used to simultaneously measure the depth of multiple test ablations on a test surface, allowing for efficient calibration of pulse energy by correlating ablation depth with pulse energy, and featuring index markings for precise alignment and a vacuum system for secure handling of test objects, along with a camera system for automatic orientation adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple test ablations are measured sequentially with a single measuring probe, then measurement precision can be maintained, but calibration time and work increase significantly
Solution Approach 1:
The measuring head is divided into multiple independent measuring probes (at least two), each capable of measuring ablation depth independently. This segmentation allows simultaneous measurement of multiple test ablations, reducing calibration time while maintaining measurement precision through parallel operations
Solution Approach 2:
Multiple measuring probes are combined into a single measuring head assembly that operates together. The probes are arranged in a fixed spatial configuration matching the test ablation pattern, enabling simultaneous measurement of multiple craters in one operation, thus reducing total calibration time without sacrificing measurement accuracy
2Device complexity
If manual handling of test surfaces is used, then device complexity remains low, but measurement errors and contamination increase
Solution Approach 1:
A vacuum system with a vacuum plate is integrated into the measuring head to automatically hold and position the test object. The vacuum attraction securely fixes the test surface during measurement, eliminating manual handling, preventing contamination, and ensuring consistent positioning without significantly increasing device complexity
Solution Approach 2:
The test object itself serves as the positioning reference through index markings that automatically align with corresponding markings on the vacuum plate. This self-alignment mechanism eliminates the need for complex external positioning devices or manual alignment procedures, reducing measurement errors while keeping the system simple
3Measurement precision
If index markings and vacuum systems are added for precise alignment and secure handling, then measurement precision improves, but device complexity increases
Solution Approach 1:
A vacuum system with a vacuum plate is integrated into the measuring head to automatically hold and position the test object. The vacuum attraction securely fixes the test surface during measurement, eliminating manual handling, preventing contamination, and ensuring consistent positioning without significantly increasing device complexity
Solution Approach 2:
The test object itself serves as the positioning reference through index markings that automatically align with corresponding markings on the vacuum plate. This self-alignment mechanism eliminates the need for complex external positioning devices or manual alignment procedures, reducing measurement errors while keeping the system simple
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
This approach significantly reduces calibration time and work by enabling simultaneous measurement of multiple ablation depths with high precision, ensuring accurate pulse energy settings for laser treatments while minimizing contamination and measurement errors.
Implementation Method 1
a vacuum system for securing test objects on a vacuum plate by means of negative pressure
Implementation Method 2
multiple test ablations are made on a test surface by means of the laser device
Implementation Method 3
tissue ablations with laser radiation
Implementation Method 4
the depths of the test ablations are then measured, with simultaneous use of the multiple measuring probes of the measuring head
Data Source
AI summary
A test device to calibrate the pulse energy of a laser device which provides pulsed laser radiation includes a measuring head with multiple measuring probes. The test device is used in such a way that by means of the laser radiation, multiple test ablations are made on a test surface, in an arrangement corresponding to the relative spatial arrangement of the measuring probes, and the depths of the test ablations are then measured, with simultaneous use of the multiple measuring probes of the measuring head.