Rotatable Lightpipe Alignment for Pantoscopic Tilt Changes
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Solution Overview
Problem
Conventional lightpipes require redesign to align with varying pantoscopic tilt and frame orientation of glasses, affecting aesthetic integration in augmented and virtual reality systems.
Innovation Solution
A lightpipe is configured with a rotational axis of symmetry, allowing it to be rotated to align with the frame of glasses without redesign, maintaining optical performance and aesthetic alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional lightpipe is designed to align with the frame of glasses, then aesthetic integration is improved, but the lightpipe cannot accommodate varying pantoscopic tilt and frame orientation without redesign
Solution Approach 1:
The lightpipe is designed with rotational freedom around its optical axis, transforming from a fixed-orientation component to one that can dynamically adjust to different pantoscopic tilt angles and frame orientations. This rotational capability allows the same lightpipe design to adapt to varying configurations without requiring redesign.
Solution Approach 2:
The lightpipe is designed to perform multiple functions: it can accommodate various pantoscopic tilt angles, align with different frame orientations, and maintain optical performance across all configurations. This universal design eliminates the need for multiple specialized lightpipe designs for different applications.
2Shape
If the lightpipe is fixed in a specific orientation, then manufacturing and alignment are simplified, but aesthetic integration with varying frame orientations cannot be achieved
Solution Approach 1:
The lightpipe incorporates rotational freedom around its optical axis, allowing it to be manufactured in a standard orientation and then rotated during assembly to match various frame orientations. This dynamic capability simplifies manufacturing while enabling aesthetic integration.
3Adaptability or versatility
If the lightpipe is redesigned for each pantoscopic tilt variation, then optimal aesthetic alignment is achieved, but device complexity and development time increase
Solution Approach 1:
The lightpipe is designed with rotational freedom around its optical axis, allowing a single standardized design to adapt to various pantoscopic tilt angles through rotation rather than requiring multiple redesigned variants. This eliminates repetitive redesign cycles.
Solution Approach 2:
The lightpipe design achieves universal compatibility across different pantoscopic tilt variations, allowing one design to serve multiple applications without requiring time-consuming redesign for each specific tilt angle.
Data Source
AI summary
Based on a rotational axis of symmetry for an output of a lightpipe coinciding with an input axis for projection optics, the lightpipe can be rotated around the rotational axis, in order to align the lightpipe with a frame of associated glasses, or correspondingly the temple of a wearer of the glasses. Thus, an improved or optimal aesthetic look of a display system can be approached. The lightpipe of the display system can be aligned with the frame of the glasses, or even hidden within the frame, depending on implementation details and requirements for image projection components. If a pantoscopic tilt of the lens (waveguide) changes, a rotation of the lightpipe can be applied to the lightpipe to bring the lightpipe in a position aligned with the temple again, thus avoiding the need for a lightpipe redesign.