Polarized Light Imaging for In Vivo Collagen Structure
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Solution Overview
Problem
Current imaging techniques for collagen structure in vivo are limited by shallow imaging depths, high power densities, and small field of view, making it difficult to achieve high contrast, high resolution images of collagen structure noninvasively and in real time.
Innovation Solution
A polarization-sensitive, wide-field reflectance imaging device that uses an imaging detector and light source to illuminate the skin with polarized light at multiple wavelengths, allowing for optical sectioning and quantitative assessment of collagen structure without biopsy, with a handheld device for portability and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If confocal microscopy is used to achieve cellular resolution imaging, then imaging resolution is improved, but imaging depth is limited to shallow depths and field of view is small
Solution Approach 1:
The patent replaces mechanical scanning systems with a wide-field static imaging system. Instead of using confocal microscopy's point-by-point scanning mechanism, the invention uses a broadband light source with polarizing beamsplitters and a static detector array to capture the entire field of view simultaneously, achieving both deep imaging and large field of view without mechanical movement.
Solution Approach 2:
The patent adds the dimension of polarization state to the imaging system. By incorporating polarizing beamsplitters and analyzing polarization states of reflected light, the system achieves optical sectioning and depth discrimination without relying on mechanical scanning or narrow focal planes, thereby expanding imaging depth and field of view while maintaining resolution.
2Length of stationary object
If non-linear microscopy techniques are used to achieve deeper light penetration, then imaging depth is improved, but high power densities and small field of view are required
Solution Approach 1:
The patent replaces high-power nonlinear optical processes with a passive reflectance-based imaging system. Instead of using two-photon excitation or second harmonic generation that require high peak powers, the invention uses broadband visible light that reflects off tissue structures, requiring only low-power illumination while achieving comparable or superior imaging depth.
Solution Approach 2:
The patent exploits the intrinsic optical properties of tissue (reflectance and polarization characteristics) rather than requiring external energy input to generate contrast. The tissue itself provides the imaging signal through natural light reflection and polarization effects, eliminating the need for high-power excitation sources.
3Length of stationary object
If non-linear microscopy techniques are used to achieve deeper light penetration, then imaging depth is improved, but field of view remains very small
Solution Approach 1:
The patent uses polarization state as an additional dimension to achieve optical sectioning and depth discrimination. By analyzing the polarization characteristics of reflected light at different depths, the system achieves deep imaging with large field of view without requiring narrow focal planes or mechanical scanning, thereby simultaneously expanding both imaging depth and field of view.
Solution Approach 2:
The patent replaces the narrow field of view inherent in scanning microscopy with a wide-field static detector array. The entire field of view is captured simultaneously without mechanical movement, achieving both large field of view and deep imaging depth through the polarization-based optical sectioning mechanism.
4Measurement precision
If biopsy is used to inspect collagen structure, then measurement precision is improved, but scarring and infection risks occur and in vivo imaging is not possible
Solution Approach 1:
The patent creates an optical copy of the collagen structure through noninvasive reflectance imaging. Instead of physically removing tissue for histological analysis, the system uses polarized light to generate images that replicate the structural information of collagen bundles, enabling precise measurement without any physical contact or tissue damage.
Solution Approach 2:
The patent replaces mechanical tissue removal (biopsy) with optical imaging. By using polarized reflectance microscopy, the system obtains high-precision collagen structure measurements through light interaction with tissue, completely eliminating the need for physical sampling and associated risks of scarring and infection.
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
Enables rapid, noninvasive, in vivo imaging of large skin areas with high resolution and contrast, providing quantitative data on collagen density and structure, effectively monitoring changes in dermal conditions and collagen degradation with age.
Implementation Method 1
A polarization-sensitive, wide-field reflectance imaging device that uses an imaging detector and light source to illuminate the skin with polarized light at multiple wavelengths
Implementation Method 2
polarized images are obtained at the tissue surface and at different selected depths beneath the dermal surface
Data Source
AI summary
The present invention relates to systems and methods or wide-field polarized imaging of the skin. Preferred embodiments of the invention provide quantitative characterization of collagen structures in the skin and can be used to monitor skin treatment. A preferred embodiment can comprise a handheld imaging device that generates polarized images at different depths beneath a dermal surface and a data processor to process image data.