Electrostatic Field for Laser Induced Optical Breakdown Control
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Solution Overview
Problem
Conventional laser therapies in biological media, such as tattoo removal, face inefficiencies due to laser-induced optical breakdown (LIOB) causing remote vacuoles that lead to laser attenuation and damage to surrounding tissue, making it difficult to achieve maximum therapeutic effect in a single treatment session.
Innovation Solution
The application of a selective electrostatic field in a biological medium inhibits remote vacuole formation while allowing particle vacuole formation, enhancing laser effectiveness by moving free electrons away from the laser path, thus reducing dermal damage and enabling more effective and efficient treatments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-powered pulsed laser is used to treat biological medium, then laser effectiveness against absorptive target is improved, but remote vacuole formation causes laser attenuation and tissue damage
Solution Approach 1:
An electric field is introduced as an intermediary to manipulate free electrons in the biological medium. The electric field causes electrons to move away from the laser path, preventing them from participating in LIOB events that lead to remote vacuole formation, while allowing the laser to continue ablating pigment particles effectively
Solution Approach 2:
The physical state of free electrons is changed by applying an electric field, which alters their spatial distribution and movement. This parameter change prevents electrons from accumulating in regions where they would cause harmful LIOB events, thereby reducing remote vacuole formation while preserving laser effectiveness against pigment particles
2Productivity
If laser fluence is increased to achieve maximum therapeutic effect in single session, then treatment efficiency is improved, but dermal damage and vacuole formation increase
Solution Approach 1:
The electric field acts as a mediator that decouples the relationship between laser fluence and harmful effects. By controlling electron distribution independently through the electric field, higher laser fluences can be applied to achieve maximum pigment ablation in a single session without proportionally increasing remote vacuole formation and tissue damage
3Object-affected harmful factors
If multiple treatment sessions are used to reduce tissue damage, then patient safety is improved, but treatment time and discomfort increase
Solution Approach 1:
The electric field enables single-session treatments to achieve the same therapeutic effect that would otherwise require multiple sessions. By preventing harmful LIOB events through electron manipulation, the electric field allows sufficient laser energy to be delivered in one session to achieve maximum pigment removal, eliminating the need for repeated treatments and associated patient discomfort
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 allows for greater laser effectiveness against absorptive targets, reducing the need for multiple treatment sessions, minimizing tissue damage, and achieving faster tattoo fading with fewer treatments and less discomfort.
Implementation Method 1
The application of a selective electrostatic field in a biological medium inhibits remote vacuole formation while allowing particle vacuole formation, enhancing laser effectiveness by moving free electrons away from the laser path
Implementation Method 2
Laser induced optical breakdown (LIOB) is the catastrophic evolution of damage inflicted in a medium by a beam of high laser fluence, which results in electron avalanche (e.g., a build of free carries in a relatively short time) and plasma formation
Implementation Method 3
a vacuum head configured to apply suction to a portion of the biological medium, the vacuum head configured to permit light to reach the portion of the biological medium
Data Source
AI summary
Apparatuses and methods for selectively providing laser induced optical breakdown (LIOB) of absorptive targets in biological media. For example, LIOB may be used as part of tissue therapy, such as cosmetic therapy associated with tattoo removal. In some implementation, a system for selectively providing LIOB includes a field generator configured to generate a field and to apply the field through a portion of a biological medium. The system also includes a light source configured to deliver laser light to the portion of the biological medium during application of the field. Application of the field to the biological medium induces movement of free electrons within the portion of the biological medium which may reduce or slow the formation of vacuoles in the biological medium responsive to the laser light.