Scattering Support Material for Optical Analysis
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Solution Overview
Problem
Optical devices analyzing scattering media often produce artifacts due to the support materials used, which disturb the measurement of optical properties, especially when the light source is distant from the medium, leading to inaccurate image analysis.
Innovation Solution
A support made from a scattering material with a controlled scattering and absorption coefficient is used, which diffuses the incident light before it reaches the scattering medium, reducing the formation of artifacts and improving image accuracy by creating a known scattering system with the medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a non-scattering support material is used, then the support structure is simple and light propagation is undisturbed, but artifacts are formed on the images due to direct light paths
Solution Approach 1:
A diffusing layer is introduced as an intermediary between the non-scattering support and the scattering medium. This layer has scattering properties that prevent direct light paths from reaching the detector, thereby eliminating artifacts while maintaining the simplicity of the overall support structure.
Solution Approach 2:
The support structure is designed with heterogeneous optical properties: the main support body remains non-scattering for structural simplicity, while a specific local region (the diffusing layer in contact with the medium) has scattering properties to prevent artifact formation. This localized modification resolves the contradiction without complicating the entire structure.
2Measurement precision
If a scattering support material is used, then artifacts are reduced on images, but the support structure becomes more complex
Solution Approach 1:
Instead of making the entire support structure scattering (which would increase complexity), only a specific local region - the diffusing layer - is given scattering properties. The rest of the support maintains its simple non-scattering structure, thus achieving artifact reduction without excessive complexity.
3Reliability
If the light source is in direct contact with the medium, then the environment disturbance is minimized, but the device becomes bulky due to numerous optical fibers
Solution Approach 1:
The optical coupling function is extracted from the complex optical fiber system and implemented through a simplified diffusing layer in direct contact with the medium. This layer provides adequate optical coupling without requiring numerous optical fibers, thereby reducing device bulk while maintaining measurement stability.
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 use of a scattering support material minimizes artifacts in image analysis, enhances optical coupling, and allows for more precise determination of optical properties, reducing the risk of surface lesions from high-intensity light sources and maintaining stable optical properties over time.
Implementation Method 1
All or part of the support is formed of a scattering material having a decreased scattering coefficient greater than 0.1 cm−1 and smaller than 700 cm−1
Implementation Method 2
at least partially non-absorbing for the incident light beam and the scattered radiation
Data Source
AI summary
An optical device intended for the analysis of a scattering medium, including at least one light source distant from the scattering medium and capable of providing an incident light beam intended to illuminate the scattering medium; at least one sensor capable of detecting a radiation emitted by the scattering medium; a support of the scattering medium at least partially non-absorbing for the incident light beam and the scattered radiation. All or part of the support is formed of a scattering material having a decreased scattering coefficient greater than 0.1 cm−1 and smaller than 700 cm−1.