Ophthalmic Display Optical Unit for Contactless Binocular Vision
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Solution Overview
Problem
Current image display systems for ophthalmic diagnostics and surgical treatments lack the ability to provide independent movement of imaging and display sections, limiting the observer's flexibility and increasing the risk of discomfort due to physical contact, while also not allowing for binocular vision without complex pupil distance adjustments.
Innovation Solution
An image display device with an optical unit that forms an exit pupil and a reflection section to relay this pupil to a conjugate position, enabling independent movement of imaging and display sections and providing binocular vision without physical contact, using an optical unit with a focal length that maintains image size and quality across varying observer positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the imaging and display sections are integrated in a fixed configuration, then the system structure is simple, but the observer's flexibility is limited and physical contact causes discomfort
Solution Approach 1:
The system is divided into separate imaging section and display section that can move independently. The imaging section can be positioned at different locations while the display section remains fixed or moves separately, allowing the observer to view images without physical contact with the imaging components.
2Manufacturing precision
If the observer moves closer to view the image, then the image appears larger, but the image quality and size become unstable
Solution Approach 1:
An optical system acts as an intermediary between the imaging section and the observer's eye. This optical system includes elements that relay the exit pupil to a conjugate position, maintaining stable image characteristics regardless of the observer's distance from the display.
3Ease of operation
If a screen is used to display the projected image, then the image can be viewed, but the system requires physical contact and reduces observer flexibility
Solution Approach 1:
The traditional mechanical screen display is replaced with an optical system that forms images in air or vacuum. The optical unit with its exit pupil and relay optical element creates a viewable image without requiring a physical screen, enabling contactless viewing while maintaining image stability.
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 configuration allows for enhanced observer flexibility, reduces discomfort by avoiding physical contact, and provides stable binocular vision without the need for pupil distance adjustments, improving the operational efficiency and comfort in ophthalmic imaging systems.
Implementation Method 1
an optical unit 42 having a focal point on an incident side of light at a position where an image of an object is set
Implementation Method 2
a reflection section 44 configured to reflect light emitted from the optical unit 42 and relay an exit pupil to a position having a conjugate relationship to the exit pupil
Data Source
AI summary
In an ophthalmic imaging system an image imaged by an imaging section for a right eye is formed as an imaging image on a display, and then displayed through a right-eye optical unit and a reflection member. An image imaged by an imaging section for a left eye is formed as an imaging image on a display, and then displayed through an optical unit and the reflection member. This thereby enables the object to be visually inspected as a three-dimensional image by the observer viewing the right-eye imaging image and the left-eye imaging image, which differ from each other according to the parallax therebetween, by viewing the respective images through right and left eyes.