Laser Therapy Device Uniform Intensity Distribution
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Solution Overview
Problem
Existing low power laser therapy devices struggle to achieve uniform intensity distribution over large areas of skin, which is essential for effective cosmetic treatments while maintaining portability and safety from electrical shocks.
Innovation Solution
The device incorporates at least two optical systems with a laser light source, a beam expander, a raster arrangement of first light scattering elements, and a second light scattering element that fills the mouth opening of the housing, made of pyramids arranged in rows and columns, to achieve uniform intensity distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If laser light sources are used to irradiate large areas of skin, then the treated area increases, but the intensity distribution becomes non-uniform
Solution Approach 1:
The device divides the optical system into multiple independent laser light sources (at least three), each with its own beam expander and scattering elements. This segmentation allows each source to contribute to a specific zone, and when combined, they create a large uniformly illuminated area without the intensity non-uniformity that would occur with a single source covering the entire area.
Solution Approach 2:
The patent employs zone-specific optical elements including first light scattering elements arranged in a raster pattern and second light scattering elements positioned at specific distances. These elements are configured to create locally optimized intensity distributions that, when combined from multiple sources, produce overall uniform illumination across the large treated area.
2Power
If multiple laser sources are used to increase power, then the available power increases, but heat generation increases requiring cooling ribs
Solution Approach 1:
The device uses multiple separate laser light sources instead of one high-power source. Each source generates less heat individually, and the heat is distributed across multiple locations rather than concentrated in one area, making thermal management more effective even with the presence of cooling ribs.
Solution Approach 2:
The patent introduces beam expanders and light scattering elements as intermediary optical components between the laser sources and the treatment area. These intermediaries not only shape and distribute the light but also help in managing the thermal characteristics of the system by spreading the energy distribution.
3Ease of operation
If battery power source is used for portability, then free movement is enabled, but power supply capacity is limited
Solution Approach 1:
The optical system is segmented into multiple efficient laser sources that collectively provide sufficient power for effective treatment. This segmentation allows the use of lower-capacity battery sources while still achieving the required total power output, as each individual source requires less power than a single high-power source would need.
Solution Approach 2:
The patent optimizes various parameters including the wavelength (infrared range), power of individual sources (100-600 mW each), and the optical path configuration to maximize efficiency. These parameter optimizations enable the system to achieve effective treatment power levels while maintaining compatibility with portable battery power sources.
4Illumination intensity
If beam expanders and scattering elements are added to achieve uniform distribution, then intensity uniformity improves, but device complexity increases
Solution Approach 1:
The patent combines multiple functional elements into integrated optical systems. Each laser source is paired with its own beam expander and scattering elements, creating modular units that can be replicated. This merging approach simplifies the overall design compared to using a single complex optical system, as each module is relatively simple and standardized.
Solution Approach 2:
The optical elements are strategically positioned and configured to perform specific local functions: beam expanders are placed at optimal distances from sources, first scattering elements are arranged in raster patterns on frontal surfaces, and second scattering elements are positioned at calculated distances. This local optimization achieves uniform intensity distribution efficiently without requiring overly complex system-wide arrangements.
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 configuration ensures a substantially uniform and intense light distribution over a larger area, enhancing the effectiveness of cosmetic treatments while maintaining the device's portability and safety from electrical hazards.
Implementation Method 1
a beam expander in front of said light source
Implementation Method 2
a raster arrangement of first light scattering elements on the frontal surface of the associated beam expander
Data Source
AI summary
Low power laser therapy device, which comprises at least two optical systems each of them comprising a laser light source, a beam expander in front of the light sources, a raster arrangement of first light scattering elements on the frontal surface of the associated beam expander, and the device comprise a housing around the optical systems having a mouth opening covered by a closing member, wherein in front of the optical systems a second light scattering element is arranged that fills the mouth opening and comprising a raster arrangement of pyramids arranged in rows and columns, and the first light scattering elements are made as pyramids, and the beam expanders and the first and second light scattering elements are made from transparent material that does not affect the polarization of light rays passing therethrough.