Multicore Fiber Endoscope Imaging Resolution Attenuation
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Solution Overview
Problem
Current endoscope technologies face challenges in efficiently delivering high-resolution images through long and narrow fiber optics due to attenuation and cross-talk issues, limiting the information content and field of view.
Innovation Solution
The development of multicore fibers with at least 10,000 cores and photonic crystal fiber configurations, along with adiabatically tapered proximal tips and spectral multiplexing, reduces attenuation and cross-talk, enhancing image delivery and information content while maintaining flexibility and optical fidelity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional fiber optics are used for endoscope operations, then the endoscope can maintain flexibility and access to narrow areas, but image resolution and information content are limited due to attenuation and cross-talk
Solution Approach 1:
The fiber is divided into multiple independent cores (at least 10,000 cores) within a common cladding, where each core acts as an independent light transmission channel. This segmentation prevents cross-talk between adjacent light paths and maintains signal integrity over long distances, thereby reducing effective attenuation and enabling high-resolution imaging through flexible fiber bundles.
2Loss of information
If more cores are packed into the fiber to increase information content, then spectral imaging and 3D imaging capabilities are enhanced, but cross-talk between cores increases
Solution Approach 1:
The cladding material and structure are specifically engineered with localized properties to provide strong optical isolation between adjacent cores. The cladding's refractive index and thickness are optimized to create effective potential barriers at each core interface, preventing light leakage and cross-talk while allowing high core density for increased information content.
3Length of moving object
If the fiber cross-section area is reduced to maintain flexibility, then access to narrow areas is improved, but the field of view and image quality deteriorate
Solution Approach 1:
The invention transitions from two-dimensional core arrangements to three-dimensional core packing within the fiber cross-section. Cores are distributed throughout the volume of the cladding in multiple layers and orientations, effectively utilizing the third dimension to increase the number of independent light channels without increasing the fiber's external diameter, thus maintaining flexibility while expanding field of view.
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 solution improves image resolution, reduces attenuation, and increases the information content delivered through the fibers, enabling more efficient and flexible endoscope operations with enhanced field of view and modalities like spectral imaging and 3D imaging.
Implementation Method 1
a proximal re-orienting element for re-orienting the delivered image radiation from the cores to fill an area on the adjacent sensor that is smaller than a cross-section area of the multicore imaging fiber
Implementation Method 2
a multicore imaging fiber comprising at least 10,000 cores with a common cladding and configured to deliver image radiation from a distal end of the fiber
Implementation Method 3
the cores are interspaced within a fiber cross-sectional area to prevent cross-talk therebetween
Data Source
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AI summary
Multicore fibers and endoscope configurations are provided, along with corresponding production and usage methods. Various configurations include an adiabatically tapered proximal fiber tip and/or proximal optical elements for improving the interface between the multicore fiber and the sensor, photonic crystal fiber configurations which reduce the attenuation along the fiber, image processing methods and jointed rigid links configurations for the endoscope which reduce attenuation while maintaining required flexibility and optical fidelity. Various configurations include spectral multiplexing approaches, which increase the information content of the radiation delivered through the fibers and endoscope, and configurations which improve image quality, enhance the field of view, provide longitudinal information. Various configurations include fiber-based wave-front sensors. Many of the disclosed configurations increase the imaging resolution and enable integration of additional modes of operation while maintain the endoscope very thin, such as spectral imaging and three dimensional imaging.