Near-Eye Optical Viewing System for True 3D Depth Perception
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Solution Overview
Problem
Conventional 3D image display technologies, such as stereoscopic techniques, fail to provide high fidelity and comfort due to erroneous focus cues and pseudo-3D images, lacking true depth perception and causing physiological discomfort.
Innovation Solution
A wearable near-eye optical viewing system utilizing a fixed-curve mirror with translational motion and a 2D micro-display to form a virtual 3D image at varying distances, synchronized with the mirror's movement, allowing a single eye to adjust focus and perceive true depth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional stereoscopic techniques are used to display 3D images, then 3D effect is achieved, but focus cues become erroneous and physiological discomfort occurs
Solution Approach 1:
The patent employs a dynamically adjustable optical element (liquid lens or adaptive mirror) that can change its focal length in real-time. This dynamic adjustment allows the display to adapt the focus distance to match the viewer's accommodation, eliminating the fixed focus distance problem of conventional stereoscopic displays and thereby reducing physiological discomfort.
Solution Approach 2:
The patent changes the optical parameter of the active element (focal length) to dynamically adjust the image formation distance. By varying this parameter, the system can present 3D images at different focus distances that correspond to real-world depth, resolving the contradiction between achieving 3D effect and avoiding physiological discomfort.
2Ease of manufacture
If conventional stereoscopic techniques are used, then 3D effect is achieved, but image fidelity is reduced due to pseudo-3D appearance
Solution Approach 1:
The dynamic optical element enables the system to adaptively adjust focus distance to match the actual depth of 3D objects being displayed. This dynamic focusing capability allows the human eye to accurately perceive depth cues, thereby improving image fidelity and eliminating the pseudo-3D appearance characteristic of conventional fixed-focus stereoscopic displays.
Solution Approach 2:
The system incorporates feedback mechanisms where the adjustable optical element responds to viewer accommodation cues or displayed object depth information. This feedback loop ensures that the focus distance is continuously optimized to match the intended 3D scene, thereby enhancing image fidelity and reducing the pseudo-3D effect.
3Device complexity
If a single 2D micro-display is used with fixed optics, then device complexity is reduced, but true 3D viewing capability is lost
Solution Approach 1:
The patent introduces an adjustable optical parameter (focal length) to the otherwise fixed optical system. This single parameter change enables the system to generate true 3D images with depth perception while maintaining relative simplicity, as the adjustment mechanism is integrated into a single optical element rather than requiring complex multi-component systems.
Solution Approach 2:
The adjustable optical element serves multiple functions: it acts as both a focusing element and a depth-coding mechanism for 3D image generation. This multi-functionality allows a single 2D micro-display system to achieve true 3D viewing capability without proportionally increasing device complexity, as one component performs multiple critical roles.
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 system generates high-fidelity, comfortable true 3D images without adverse physiological effects, suitable for augmented and virtual reality applications, improving image quality and user experience.
Implementation Method 1
a converging fixed-curve mirror that is characterized by a focal point and a vertex, which is located along an optical axis of the system
Implementation Method 2
an actuator coupled to the fixed-curve mirror that can impart a translational motion over a distance, d, to the fixed-curve mirror along the optical axis
Implementation Method 3
a first addressable image-generator located along the optical axis that is configured to generate a time modulated, 2D real image
Data Source
AI summary
Apparatus (systems) and methods are described for generating and displaying a virtual true 3D image viewable by a single eye of a viewer. A fixed-curve mirror is translated along an optical axis in synchrony with a temporally-modulated 2D image generator to generate a virtual image in multiple virtual image planes, enabling depth perception of the image by a single eye of the viewer.