Rotatable Optical Guide for Ocular Vision System
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Solution Overview
Problem
Ocular vision systems face challenges in seamlessly switching between augmented reality and dashboard applications without obstructing the user's nominal axis of sight, and there is a concern about privacy issues due to potential unauthorized image capture.
Innovation Solution
An ocular vision system with a rotatable optical guide that can be positioned along a nominal axis or offset from it, combined with an image capture device that rotates synchronously, allowing for two modes of operation and providing a mechanism to indicate its position to prevent unauthorized photography.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the optical guide is positioned in the nominal axis of sight for augmented reality applications, then the image can be superimposed on the external scene, but the user's nominal axis of sight is obstructed
Solution Approach 1:
The optical guide is made rotatable about an axis passing through the centre of rotation of the user's eye, allowing dynamic repositioning between two positions: one for augmented reality applications and one for dashboard applications. This dynamic adjustment enables the system to adapt to different application modes without permanent structural changes.
2Ease of operation
If the optical guide is positioned offset from the nominal axis of sight for dashboard applications, then the nominal axis of sight is not obstructed, but the image cannot be superimposed on the external scene
Solution Approach 1:
The optical guide's rotatable mechanism allows it to be dynamically repositioned from the offset dashboard position to the nominal axis position when augmented reality mode is activated, and vice versa. This enables seamless switching between application modes while maintaining clear sight in dashboard mode.
3Device complexity
If the image capture device is stationary, then the system structure is simple, but privacy issues arise from unauthorized image capture
Solution Approach 1:
The image capture device is coupled to the optical guide and rotates synchronously with it. When the optical guide rotates to the offset position for dashboard applications, the image capture device also rotates away from the nominal axis of sight, preventing unauthorized capture of scenes that would otherwise be visible to the user.
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
Enables seamless switching between augmented reality and dashboard applications while maintaining clear sight and ensuring privacy by rotating the optical guide and image capture device, allowing users to control when they are being recorded.
Implementation Method 1
The optical guide enables the light beam to propagate by total internal reflections
Data Source
AI summary
An ocular vision system with a display module, which includes a transparent optical guide, is adapted for propagating, by total internal reflections, a light beam transporting an image as far as an extraction section of the optical guide. The system may include: means for positioning the optical guide in a first position in which the extraction zone is placed along a first axis corresponding to a nominal axis of sight of the user's eye; means for positioning the optical guide in a second position in which the extraction zone is placed along a second axis offset with respect to the nominal axis of sight of the user's eye; and means for rotating the optical guide about an axis intended to pass substantially through the center of rotation of the user's eye, enabling the optical guide to pass from the first position to the second position and vice versa.