Retina Imaging Optics for Compact 2D/3D Ophthalmic Viewing
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Solution Overview
Problem
Existing ophthalmic imaging systems face challenges such as poor ergonomics, limited adaptability to digital processing, complex optical paths, and inadequate resolution, which hinder accurate and efficient examination and surgical procedures.
Innovation Solution
A compact and maneuverable ophthalmic stereomicroscopy apparatus with an optical relay, shutter, tube lens, and prismatic input port system that allows for 2D and 3D imaging, adjustable stereopsis, and seamless switching between monoscopic and stereoscopic modes, incorporating features like digital zoom and optical coherence tomography.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If indirect ophthalmoscope techniques are used with digital imaging tools, then some digital imaging capability is achieved, but the procedure remains highly manual requiring expert operation with poor patient tolerance to bright light and poor image quality
Solution Approach 1:
The patent replaces the manual mechanical positioning system with an automated optical system. The fixed optical path with predetermined lens positions eliminates the need for manual positioning by the practitioner, while the optimized illumination system provides adequate brightness without requiring expert operation techniques.
2Volume of moving object
If stereomicroscope aperture sizes are reduced to improve maneuverability, then patient obscuration is reduced, but visibility of eye features deteriorates
Solution Approach 1:
The patent changes the optical parameters of the system by using optimized lens combinations and illumination techniques. This allows the system to maintain adequate aperture sizes for feature visibility while reducing the overall physical size of the microscope components for improved maneuverability.
3Adaptability or versatility
If legacy systems are modified to add digital image acquisition tools, then some digital capability is achieved, but full digital processing and display capabilities are limited
Solution Approach 1:
The patent designs a system where the optical path serves multiple functions: it enables both traditional visualization and full digital image acquisition and processing. The fixed optical components are configured to work with digital sensors, allowing the system to perform both analog and digital operations without requiring separate specialized equipment.
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
Enhances imaging resolution, improves surgeon ergonomics, and facilitates comprehensive examination and surgical procedures by providing high-resolution, adaptable, and ergonomic imaging solutions.
Implementation Method 1
an optical relay that defines an optical path and is configured to relay an image of the iris along the optical path to a pupil
Implementation Method 2
a shutter disposed at the pupil and configured to define at least a first shutter aperture for control of light transmission through the pupil position
Implementation Method 3
a tube lens disposed to direct light from the shutter aperture to one or more image sensors
Implementation Method 4
a prismatic input port disposed between the shutter and the tube lens and configured to combine, onto the optical path, light from the relay with light conveyed along a second light path that is orthogonal or extraneous to the optical path
Data Source
AI summary
An apparatus for obtaining an image of a retina is described herein. The apparatus includes an optical relay that defines an optical path and is configured to relay an image of the iris along the optical path to a pupil, a shutter is disposed at the pupil and configured to define at least a first shutter aperture for control of light transmission through the pupil position, a tube lens disposed to direct light from the shutter aperture to an image sensor, and a prismatic input port disposed between the shutter and the tube lens and configured to combine, onto the optical path, light from the relay with light conveyed along a second light path that is orthogonal to the optical path.