Flat Light Diffuser Assembly for Uniform Spectroscopy Illumination
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Solution Overview
Problem
Existing flat light diffusers are not suitable for spectroscopy, particularly for dermal use, and lack efficient light transmission and coupling with underlying materials, making them unsuitable for medical applications.
Innovation Solution
A flat light guide with a diffusing layer and reflective layers, optimized for total internal reflection and diffused emission, coupled with a connector and optionally a second layer for index matching, to enhance light transmission and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional flat light diffusers are used, then light distribution is achieved, but light transmission efficiency and coupling with underlying materials deteriorates
Solution Approach 1:
The patent modifies the refractive index parameter by introducing a matching layer between the light diffuser and the underlying material. This parameter change optimizes optical coupling and minimizes reflection losses, thereby improving light transmission efficiency while enhancing coupling reliability.
Solution Approach 2:
The patent introduces a matching layer as an intermediary component between the light diffuser and the underlying material. This intermediary layer with intermediate refractive index facilitates smooth optical transition, improving both light transmission efficiency and coupling reliability by reducing interface reflections.
2Object-affected harmful factors
If conventional flat light diffusers are used, then light emission is achieved, but hotspots are generated reducing safety
Solution Approach 1:
The patent applies local quality modification by creating a patterned matching layer with varying refractive indices or thicknesses in different regions. This local variation optimizes light distribution uniformly across the surface, eliminating hotspots while maintaining overall illumination intensity.
Solution Approach 2:
The patent changes the optical parameters (refractive index, thickness) of the matching layer in a spatially varying manner to control light emission patterns. This parameter optimization ensures uniform light distribution and prevents hotspot formation, improving safety without compromising illumination quality.
3Adaptability or versatility
If conventional flat light diffusers are used, then manufacturing is simplified, but adaptability for spectroscopy and medical applications deteriorates
Solution Approach 1:
The patent segments the light diffuser structure into distinct functional layers (diffusing layer, matching layer, substrate). This segmentation allows each layer to be optimized for its specific function while maintaining overall manufacturing simplicity, enhancing adaptability for spectroscopy and medical applications.
Solution Approach 2:
The patent designs a universal light diffuser structure with a matching layer that can be adapted for multiple applications including spectroscopy and dermal use. The modular design maintains ease of manufacture while providing the versatility needed for different medical and spectroscopic applications.
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 solution provides high light transmission (up to 85%) with reduced hotspots and improved coupling to underlying materials, ensuring safe and efficient spectroscopic measurements.
Implementation Method 1
The device includes a flat light guide having two larger flat surfaces on opposite sides and side surfaces... optimized for total internal reflection
Implementation Method 2
a diffusing layer arranged in contact with at least one of the two larger flat surfaces of the flat light guide... to provide diffuse emission of light
Implementation Method 3
the reflective material may reflect light either through specular reflection or through diffuse reflection
Implementation Method 4
the reflective material may reflect light either through specular reflection or through diffuse reflection
Implementation Method 5
the diffusing layer may have a refractive index higher than the flat light guide
Data Source
AI summary
A device and method for providing diffuse emission of light through a flat surface, which includes a flat light guide having two larger flat surfaces on opposite sides and side surfaces, wherein one of the two larger flat surfaces being a light emitting surface and the other surface being a back surface, a connector for coupling light into said flat light guide, and a diffusing layer arranged in contact with at least one of said two larger flat surfaces of said flat light guide.