Semiconductor Laser Array Cooling for Medical Cosmetology
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Solution Overview
Problem
Current semiconductor laser systems for medical cosmetology have low output power, small spot size, and nonadjustable wavelength, leading to inefficient hair removal and limited therapeutic effectiveness.
Innovation Solution
A semiconductor laser system with a semiconductor laser array, optical waveguide, transparent convex contact window, and thermoelectric cooling, featuring a compact and stable structure that allows for direct skin contact, adjustable temperature, and enhanced heat dissipation, increasing laser absorption by 30-40% and improving therapeutic outcomes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a semiconductor laser is used for medical cosmetology, then the device size is reduced and power consumption is lowered, but the output power is limited and spot size is small
Solution Approach 1:
The patent uses a semiconductor laser array composed of multiple stacked semiconductor lasers instead of a single laser. This segmentation allows the system to achieve higher total output power while maintaining the compact size and low power consumption advantages of individual semiconductor lasers. Each laser element contributes to the overall power output, solving the contradiction between device size and output power.
2Device complexity
If a semiconductor laser is used for medical cosmetology, then the device structure is simplified, but the spot size remains small and treatment efficiency is low
Solution Approach 1:
The patent combines multiple semiconductor lasers into a single array structure that produces a larger effective treatment spot. By merging the output of multiple laser elements, the system achieves both structural simplicity and improved treatment efficiency, as the combined beam covers a larger area suitable for medical cosmetology procedures.
3Power
If laser energy is increased for better treatment effectiveness, then therapeutic effectiveness improves, but skin damage and pain increase
Solution Approach 1:
The patent applies selective cooling to specific regions where the laser contacts the skin. By providing localized cooling at the treatment site while maintaining higher laser energy output, the system achieves effective treatment without causing skin damage or excessive pain. The cooling is applied precisely where needed, allowing high power operation safely.
4Temperature
If the contact window temperature is lowered to reduce pain, then patient comfort improves, but laser absorption by skin decreases
Solution Approach 1:
The patent implements selective cooling only at the contact window area where the laser exits, rather than cooling the entire laser system. This localized approach maintains low temperature at the skin interface for patient comfort while preserving the high energy output and absorption characteristics of the laser beam in the treatment zone, resolving the contradiction between temperature and absorption.
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 higher energy density and improved therapeutic effectiveness by restricting laser divergence, maintaining a low skin contact temperature, and enhancing cooling efficiency, thereby increasing treatment efficiency and reducing pain during medical procedures.
Implementation Method 1
an optical waveguide disposed in front of a light emitting surface of the semiconductor laser array
Implementation Method 2
a cooling block for conduction cooling of the contact window... a thermoelectric cooler is disposed below the base of the cooling block
Implementation Method 3
a cooling block for conduction cooling of the contact window. The cooling block comprises a base and a hollow head located on the base
Implementation Method 4
a semiconductor laser array comprising a plurality of stacked semiconductor lasers
Data Source
AI summary
A semiconductor laser system for laser medical cosmetology, comprising a semiconductor laser array (1), an optical waveguide (2), a boss-shaped transparent contact window (3) located at the light outlet end of the optical waveguide (2), and a refrigeration block (4) for conduction cooling of the contact window (3); the refrigeration block (4) consists of a base portion and a hollow head above the base portion; the front part of the hollow head presses against and is tightly fastened to the whole side wall of the contact window (3); the light outlet end of the optical waveguide (2) is located in the cavity of the hollow head, and has a gap between the waveguide and the inner wall of the hollow head; a thermoelectric semiconductor refrigerator (5) is disposed below the base portion of the refrigeration block (4); a first water supply block (6) is disposed below the thermoelectric semiconductor refrigerator (5); and a second water supply block (16) for heat dissipation is installed in the semiconductor laser array (1). The system employs a unique refrigeration structure design so as to cause the temperature of the face of the working end in direct contact with skin to approach the freezing point, and the structure is compact and stable.