Adaptive Optical Retinal Imaging Dual Wavefront Correction
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Solution Overview
Problem
Current adaptive optical retinal imaging systems fail to completely correct wave front aberrations, resulting in insufficient horizontal resolution and low precision in multifunctional imaging, particularly due to the limitations of single wave front correctors and complex configurations that do not effectively separate aberrations for con-focal scanning and optical coherence tomography imaging paths.
Innovation Solution
An adaptive optical retinal imaging device that combines con-focal scanning and optical coherence tomography techniques with a primary aberration correction unit using two wave front sensors and correctors to compensate both high-order and low-order aberrations, along with a visual target and pupil monitoring system for enhanced precision and resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If one single wave front corrector is used to correct aberrations, then the device complexity is reduced, but the manufacturing precision and reliability of aberration correction deteriorate because the correction range cannot meet the requirements for different persons and residual aberration greatly influences imaging resolution
Solution Approach 1:
The patent divides the single wave front corrector into two separate correctors: a first wave front corrector for correcting low-order aberrations and a second wave front corrector for correcting high-order aberrations. This segmentation allows each corrector to be optimized for its specific function, improving overall correction precision while maintaining manageable device complexity
Solution Approach 2:
The patent applies different correction strategies to different parts of the wave front aberration spectrum. Low-order aberrations (which have larger impact on imaging) are corrected by the first corrector with higher precision requirements, while high-order aberrations are handled by the second corrector. This local quality approach ensures that each corrector operates at optimal precision for its designated aberration type
2Device complexity
If one wave front detector controls two wave front correctors connected in series, then the device complexity is reduced, but the measurement precision deteriorates because the detection amount cannot decompose the respective wave front aberrations for con-focal scanning and optical coherence tomography imaging light paths
Solution Approach 1:
The patent segments the single detection function into two separate wave front detectors: a first detector for measuring aberrations in the con-focal scanning light path and a second detector for the optical coherence tomography imaging light path. This segmentation enables precise, path-specific aberration measurement, improving measurement precision while keeping the detection system manageable through functional specialization
Solution Approach 2:
Each wave front detector is optimized for its specific light path and imaging modality. The first detector is configured for con-focal scanning characteristics while the second is optimized for optical coherence tomography, ensuring that each detector provides maximum measurement precision for its designated application
3Device complexity
If a single aberration correction system is used for both con-focal scanning and optical coherence tomography, then the device complexity is reduced, but the adaptability deteriorates because the system cannot implement separation of wave front aberrations for different imaging modes
Solution Approach 1:
The patent segments the aberration correction system into two independent correction paths: one for con-focal scanning imaging and another for optical coherence tomography imaging. Each path has its own wave front detector and corrector configured for the specific requirements of that imaging mode, enabling the system to adapt to different imaging modalities while maintaining manageable overall complexity through modular architecture
Solution Approach 2:
The patent creates a multi-functional aberration correction system where separate correction mechanisms serve different imaging purposes. The first correction system handles con-focal scanning requirements while the second handles optical coherence tomography requirements, making the overall system adaptable to multiple imaging modes without requiring a single complex universal corrector
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 device achieves high-resolution, high-precision imaging by accurately correcting aberrations for both con-focal scanning and optical coherence tomography, improving horizontal and longitudinal resolution and enhancing the practicality of retinal imaging systems.
Implementation Method 1
a wave front sensor configured to detect a wave front of the detection light
Implementation Method 2
a wave front corrector configured to correct the detected wave front aberrations
Implementation Method 3
combines a number of modules including a light processing unit, an adaptive optical unit, a confocal scanning unit
Implementation Method 4
an optical coherence tomography unit configured to perform optical coherence tomography imaging
Data Source
AI summary
The present disclosure provides an adaptive optical retina imaging apparatus and method. The adaptive optical retina imaging apparatus comprises an optical processing unit, an adaptive optical unit, a two-dimensional scanning unit and a primary aberration correcting unit, in which an imaging unit included in the optical processing unit is imaging based on the signal after high order aberration compensation and low order aberration compensation. By combining the adaptive optical technique, a con-focal scanning technique and the optical coherence tomography technique, two wave front sensors are utilized to detect wave front aberrations between the con-focal scanning optical path and the optical coherence tomography optical path and two wave front correctors are utilized to correct low order aberration and high order aberration of human's eyes, so as to implement low order aberration and high order aberration for the two optical paths and to implement imaging of human's eyes in a higher transverse resolution and a higher longitudinal resolution.