Ocular Imaging System Using High-Sensitivity Sensor for Ambient Light Retinal Capture
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Solution Overview
Problem
Current ophthalmological examination methods face challenges in obtaining detailed, high-resolution color images of the retina without using mydriasis or high-intensity light sources, as existing solutions either cause patient discomfort, damage retinal cells, or result in low-resolution monochrome images.
Innovation Solution
An ocular imaging system utilizing a high-sensitivity, high-resolution image sensor array with imaging optics and a tunable color filter, capable of operating under ambient light conditions, to produce detailed color images without the need for mydriasis or flashlamps, allowing for the detection of ocular pathology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If mydriasis is used to dilate the pupil, then light intake is improved, but patient comfort deteriorates due to light sensitivity and extra treatment time
Solution Approach 1:
The patent replaces the mechanical/chemical method of mydriasis (drug-induced dilation) with an optical system that uses sensitive imaging sensors to capture retinal images under normal pupil conditions, eliminating the need for pharmacological intervention and its associated discomforts
Solution Approach 2:
The patent changes the imaging parameters by using highly sensitive image sensors that can detect light at very low intensities, allowing the system to function with the pupil in its normal state rather than requiring dilation, thus maintaining patient comfort while achieving adequate image quality
2Illumination intensity
If flashlamps are used to provide high-intensity light, then light intake is improved, but patient comfort deteriorates and retinal damage occurs
Solution Approach 1:
The patent replaces the flashlamp-based illumination system with a camera system that uses sensitive image sensors to capture retinal images under ambient or low-intensity lighting conditions, eliminating the need for high-intensity light sources that can damage retinal cells
Solution Approach 2:
The patent converts the limitation of low light intake into a benefit by using highly sensitive image sensors that can detect and capture retinal structures under ambient lighting conditions, turning the previously harmful need for high-intensity light into an opportunity to use safer, lower-intensity illumination
3Illumination intensity
If image intensifiers are used to maximize light efficiency, then light intake is improved, but image quality deteriorates due to low resolution and monochrome output
Solution Approach 1:
The patent replaces the image intensifier system with a direct digital imaging system that uses sensitive image sensors to capture retinal images, eliminating the need for image intensification while achieving high-resolution color imaging through advanced sensor technology
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 detailed, high-resolution color imaging of the retina under ambient light conditions, facilitating early detection of ocular pathology without causing patient discomfort or retinal damage, while maintaining high diagnostic sensitivity and specificity.
Implementation Method 1
an image sensor array that detects ambient light reflected from the patient's retina to produce an image
Data Source
AI summary
An imaging system for examining the interior structure of the eye at high-resolution under ambient light without the need for chemical dilation of the pupil.