Eye Imaging System Radial Light Source Scanning Stray Light Elimination
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Solution Overview
Problem
Conventional eye imaging systems suffer from poor image quality due to ghost images and stray lights, high production costs, complex structures, high energy consumption, and patient discomfort, which existing solutions fail to adequately address.
Innovation Solution
An eye imaging system comprising a light source module, radial splitting module, common optical module, area array image receiver, and motion driving module, where the light source moves radially to eliminate stray lights and the image receiver is continually exposed for synchronized signal acquisition, utilizing a common optical path and ribbon light source to minimize surplus light exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If conventional black pot plate or annular aperture are employed to eliminate ghost image and stray lights, then the ghost image and stray lights are reduced, but the image quality is poor and the structure becomes complex
Solution Approach 1:
The patent segments the optical system into distinct functional modules: illumination optical path, observation optical path, and common optical path. The illumination and observation paths share only the common optical path, allowing independent optimization of each path while reducing overall structural complexity. This modular segmentation enables effective stray light elimination without requiring complex integrated structures.
Solution Approach 2:
The patent inverts the conventional approach by making the illumination optical path independent from the observation optical path, rather than having them fully integrated. The illumination light source and its optical path are separated, with only the common optical path shared. This inversion allows for simpler结构设计 while maintaining effective ghost image and stray light elimination.
2Object-generated harmful factors
If annular aperture is employed to eliminate stray lights, then the stray lights are reduced, but the availability of the light source is low while energy consumption is high
Solution Approach 1:
The patent applies local quality control by using specific optical elements (black pot plate, annular aperture) only where needed in the optical path to eliminate stray lights, rather than uniformly reducing light source output. This localized approach maintains high light source availability and energy efficiency in the main optical path while selectively blocking stray lights in specific regions.
Solution Approach 2:
The patent converts the potential harm of stray lights into a beneficial design feature by strategically placing optical elements that block stray lights while preserving or even enhancing the main light path. The black pot plate and annular aperture are positioned to eliminate harmful stray reflections while maintaining optimal light transmission for imaging, effectively turning the stray light problem into an opportunity for optimized optical design.
3Measurement precision
If conventional optical instruments are used to observe and photograph the eye, then the eye structure can be observed, but the light flux entering the eye is high which results in patient discomfort
Solution Approach 1:
The patent employs dynamic control of the illumination optical path, where the illumination light source can be independently controlled in intensity and timing. The system dynamically adjusts the illumination flux to the minimum necessary level for obtaining diagnostic images, reducing patient discomfort. The synchronized operation of illumination and observation paths allows for precise temporal control of light exposure.
Solution Approach 2:
The patent changes the illumination parameters by using a separate, independently controllable illumination light source with adjustable intensity. This allows the system to use lower illumination flux levels compared to conventional instruments, reducing patient discomfort while maintaining sufficient image quality through optimized optical path efficiency and synchronized detection.
4Measurement precision
If independent lighting optical path and observation optical path are used, then the eye can be observed, but the production cost is relatively high
Solution Approach 1:
The patent implements universality by designing a common optical path that serves both illumination and observation functions. The common optical path includes shared components such as the objective lens and part of the optical train, allowing these elements to perform multiple functions. This multi-functionality reduces the total number of components needed, lowering production costs while maintaining independent control of illumination and observation paths for high imaging quality.
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 system achieves high-quality imaging with reduced stray light, lower production costs, simplified structure, reduced energy consumption, and patient comfort by minimizing light flux on the eye, effectively eliminating ghost images and stray lights.
Implementation Method 1
a reflected light ray passes through the common optical module 103, and reaches the image receiver 106 after being refracted by the radial splitting module 102
Implementation Method 2
The light ray sent out by the light source module 101 is reflected by the radial splitting module 102 and scans an eye 104 via the common optical module 103
Data Source
AI summary
An eye imaging system, including: a light source module; a radial splitting module; a common optical module; an image receiver; a power supply module for the light source module; a driver module for the image receiver; a processing-displaying module; and a motion driving module. The image receiver is an area array sensor. The motion driving module is connected to the light source module and drives the light source module to move in a radial direction of an upstream illuminating optical path formed by the light source module and the radial splitting module. The image receiver continually opens for exposure in a radial direction of a downstream observation optical path formed by the radial splitting module and the image receiver. The continual opening of the image receiver for signal acquisition is synchronous with the movement of the light source module.