Variable-Curvature Reflective Lens for Wide-FOV AR Headsets
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Solution Overview
Problem
Existing head-mounted devices fail to provide a wide field of view and clarity in augmented reality systems, and the existing spherical optics do not adequately address the challenge of immersive AR experiences in amusement parks, and the challenge of providing a seamless integration of virtual and real-world environments.
Innovation Solution
A reflective lens with a fixed curvature in a vertical plane and a variable curvature in a horizontal plane, and a variable curvature in a horizontal plane, and a fixed curvature in a spherical lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a conventional spherical lens is used in a head-mounted device, then the device structure is simple, but the field of view is limited and screen edges appear harsh
Solution Approach 1:
The lens applies different curvature radii to different regions: a first curvature radius for the central region and a second curvature radius for the peripheral region. This local differentiation allows the lens to expand the field of view while maintaining optical quality and avoiding harsh screen edges, resolving the contradiction between field of view expansion and optical performance.
2Area of stationary object
If the lens is placed closer to the user's face, then the field of view increases, but comfort decreases
Solution Approach 1:
The patent changes the curvature radius parameter across different lens regions, with the peripheral region having a different curvature radius than the central region. This parameter variation allows the lens to provide a wide field of view while maintaining comfortable spacing from the user's face, as the optimized curvature distribution improves light path control and reduces the need for close placement.
3Adaptability or versatility
If a conventional lens design is used, then manufacturing is simple, but integration of virtual and real-world environments is not seamless
Solution Approach 1:
The lens implements different curvature characteristics in different regions to optimize the integration of virtual and real-world visuals. The central region uses one curvature radius for clear virtual content display, while the peripheral region uses another curvature radius to properly frame real-world surroundings, achieving seamless integration without requiring complex multi-element lens systems.
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 reflective lens provides a seamless integration of virtual and real-world environments, enhancing the field of view and clarity without harsh screen edges, and the lens is designed to be spaced apart from the face for comfort.
Implementation Method 1
a reflective lens spaced apart from the display and configured to reflect the one or more images towards the user
Data Source
AI summary
In an embodiment, a system includes a head-mounted device including a display configured to display one or more images and a reflective lens spaced apart from the display. The reflective lens is configured to reflect the one or more images towards a user. The reflective lens includes a curved surface having a fixed curve in a vertical plane and a variable curve in a horizontal plane. The system also includes a ride vehicle configured to move along a path. The system also includes a controller communicatively coupled to the head-mounted device and the ride vehicle. The controller is configured to determine a location of the ride vehicle along the path and instruct the display to display the one or more images based on the location of the ride vehicle.