Binocular Image Display Layout With Convergence Angle Control
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Solution Overview
Problem
Existing ophthalmic devices for binocular vision imaging and display struggle to accurately present separate left-eye and right-eye images without requiring a screen and to maintain a stable viewing experience for the observer.
Innovation Solution
The image display device incorporates left-eye and right-eye optical units with independent exit pupils and a reflection section that forms conjugate relationships between the pupils, allowing for binocular vision without the need for a screen and enabling stable viewing by positioning the image centers away from the optical axes, and using a convergence angle adjustment mechanism to align the optical axes at the exit sides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a virtual image is formed using a reflection element with spatial replication functionality, then the device can display binocular images without a screen, but the image stability and viewing experience deteriorate
Solution Approach 1:
The patent divides the optical system into separate left-eye and right-eye optical units, each with its own image display section and optical path. This segmentation allows independent optimization of each eye's viewing path, improving image stability while maintaining screenless binocular display capability
Solution Approach 2:
The patent introduces a reflection element positioned at a specific location in the optical path that acts as an intermediary to relay images from the image display sections to the exit pupils. This mediator enables stable image transmission without requiring a physical screen, resolving the contradiction between screenless operation and image stability
2Measurement precision
If the image display device uses independent optical units for each eye, then binocular vision accuracy improves, but device complexity increases
Solution Approach 1:
The patent combines multiple functional elements into integrated optical units for each eye, where image display sections, optical paths, and exit pupil formations are merged into cohesive modules. This merging maintains high binocular vision accuracy while reducing overall system complexity through modular integration
Solution Approach 2:
The reflection element serves multiple functions: it relays images from both left and right optical paths, forms exit pupils, and enables the screenless display function. This multi-functionality reduces the need for separate components, thereby reducing complexity while maintaining precision
3Adaptability or versatility
If the exit pupil is formed outside the outermost lens, then viewing flexibility improves, but optical alignment difficulty increases
Solution Approach 1:
The reflection element acts as an intermediary that facilitates the formation of exit pupils outside the outermost lenses. By positioning and controlling this mediator, the system achieves viewing flexibility while managing optical alignment through the mediator's strategic placement in the optical path
4Measurement precision
If the image region center is positioned away from the optical axis, then convergence angle accuracy improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent performs preliminary positioning of image region centers away from optical axes during the design and assembly stage. By pre-establishing these offset positions and incorporating them into the optical unit configurations, the system achieves accurate convergence angles while managing manufacturing precision through advance planning and standardized positioning
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 accurate, three-dimensional image presentation in binocular vision without the use of ocular lenses or 3D glasses, enhancing the observer's viewing experience and flexibility in operation, particularly in ophthalmic surgical applications.
Implementation Method 1
The reflection section reflects light emitted from the left-eye optical unit to form a left-eye pupil at a position having a conjugate relationship to the left-eye exit pupil
Implementation Method 2
The reflection section reflects light emitted from the right-eye optical unit to form a right-eye pupil at a position having a conjugate relationship to the right-eye exit pupil
Data Source
AI summary
In an ophthalmology system, an right-eye imaged image is displayed on a display section for presentation to an observer through an optical unit and a reflection member. A left-eye imaged image is also displayed on a display section for presentation to an observer through an optical unit and a reflection member. A separation between the left and right imaged images is made wider than a spacing between the left and right optical units. This enables image presentation with the optical axes for the observer viewing the images intersecting in front so as to cause a convergence angle to arise.