Optical Waveguide Hair Cutting Device Refractive Index
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Solution Overview
Problem
Existing hair cutting devices using laser light require improvement in practical use, as they may not effectively address issues such as hair cutting efficiency and safety.
Innovation Solution
A hair cutting device and system that utilize an optical waveguide with a light irradiator, where the refractive index of the light irradiator is smaller than the refractive index of the skin's surface, allowing for efficient hair cutting by leveraging the difference in refractive indices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If laser light is used to cut hair, then hair cutting function is achieved, but safety and effectiveness are insufficient
Solution Approach 1:
The patent changes the physical parameter of refractive index by selecting specific materials for the optical waveguide core and cladding. The core material (e.g., silica glass) and cladding material (e.g., fluorinated polymer) are chosen to create a refractive index difference that enables effective light confinement and emission, directly improving the reliability and effectiveness of hair cutting while maintaining efficiency
2Manufacturing precision
If refractive index difference is utilized for light emission, then hair cutting precision is improved, but device complexity increases
Solution Approach 1:
The patent replaces mechanical cutting systems with an optical system based on refractive index differences. Instead of using physical blades or mechanical contact, the invention uses light confinement and emission through optical waveguide structures with specific refractive index profiles, thereby achieving precise hair cutting without mechanical complexity
Solution Approach 2:
The patent achieves cutting precision by controlling optical parameters (refractive index, light wavelength, emission angle) rather than mechanical parameters. The optical waveguide is designed with specific refractive index values and light is emitted at controlled angles to achieve precise hair targeting while avoiding skin contact, reducing device complexity compared to mechanical precision systems
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 proposed solution enhances hair cutting efficiency and safety by ensuring precise cutting of hair with minimal risk of skin damage, while also allowing for potential additional skin treatments like sterilization or activation.
Implementation Method 1
an optical waveguide including a light irradiator that irradiates hair protruding from skin with light to cut the hair
Implementation Method 2
A refractive index of the light irradiator is smaller than a refractive index of a surface of the skin
Implementation Method 3
The laser light source is configured to generate laser light having a wavelength selected to target a predetermined chromophore for effectively cutting hair
Data Source
AI summary
A hair cutting device according to the present disclosure comprises an optical waveguide. The optical waveguide comprises a light irradiator. The light irradiator irradiates hair protruding from the skin with light to cut the hair. The refractive index of the light irradiator is smaller than the refractive index of the surface of the skin. As a result, options such as the material of the optical waveguide and the like can be increased. Furthermore, for example, when the skin is appropriately irradiated with light from the light irradiator, an action on the skin such as sterilization or activation can also be expected.