Optical Break-through Detection in Laser Tissue Surgery
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Solution Overview
Problem
Current methods for laser surgical procedures, particularly in ophthalmology, face challenges in accurately controlling the spatial extent and position of optical break-throughs in tissues, leading to potential collateral damage and reduced precision in correcting visual deficiencies.
Innovation Solution
A device and method utilizing a detection beam path with optics to couple radiation emitted by the tissue, allowing for direct measurement of the spatial extent and position of optical break-throughs, enabling precise control of laser parameters and closed-loop feedback for improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pulsed treating laser radiation is used to achieve high localization of optical break-through, then manufacturing precision is improved, but measurement precision deteriorates due to lack of direct feedback on break-through characteristics
Solution Approach 1:
The patent implements a detection beam path that provides real-time feedback by detecting radiation emitted from the optical break-through. The detector unit measures the spatial extent and position of the break-through, and this measurement information is fed back to control the treating laser radiation, enabling closed-loop control that simultaneously achieves high localization precision and measurement precision
Solution Approach 2:
The patent introduces a detection beam path with optics as an intermediary system that couples radiation emitted by the tissue into the detection path. This intermediary enables indirect observation of the optical break-through characteristics without interfering with the primary treating laser radiation, allowing precise measurement while maintaining treatment effectiveness
2Productivity
If high power density is applied to create optical break-through, then productivity is improved through efficient tissue modification, but object-affected harmful factors increase due to collateral damage to adjacent tissue
Solution Approach 1:
The detection beam path provides real-time feedback on the optical break-through characteristics, enabling closed-loop control that adjusts laser parameters to maintain high power density for efficient tissue modification while preventing excessive energy deposition that would cause collateral damage to adjacent tissue
Solution Approach 2:
The patent uses pulsed laser radiation where the full treatment effect is achieved during brief high-power pulses, followed by intervals that allow tissue recovery. This partial action approach maintains productivity during pulse delivery while reducing cumulative thermal damage to surrounding tissue
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 enhances the selectivity and precision of laser radiation application, reducing collateral damage and improving the quality of optical corrections by directly detecting and controlling the optical break-throughs within the tissue, thereby optimizing surgical outcomes.
Implementation Method 1
The treating laser radiation acts through photo disruption or photo ablation
Implementation Method 2
The treating laser radiation acts through photo disruption or photo ablation
Implementation Method 3
Said plasma bubble grows after creation of the optical break-through due to expanding gases
Implementation Method 4
the optics couple radiation emitted by the tissue, from beneath the tissue surface, into the detection beam path
Implementation Method 5
a detector unit is arranged following the detection beam path, said detector unit generating a detection signal which indicates the spatial extent and/or position of the optical break-through in the tissue
Data Source
AI summary
The invention relates to a device for measuring an optical penetration that is triggered in a tissue underneath the tissue surface by means of therapeutic laser radiation which a laser-surgical device concentrates in a treatment focus located in said tissue. The inventive device is provided with a detection beam path comprising a lens system which couples radiation emanating from the tissue underneath the tissue surface into the detection beam path. A detector device generating a detection signal which indicates the spatial dimension and/or position of the optical penetration in the issue is arranged downstream of the detection beam path.