TL;DR
This paper presents a method for designing wedge-shaped light-guides for projectors and cameras using principles of total-internal reflection and scaling techniques.
Contribution
It introduces a calculation method for both flat and curved wedges based on the constant product of thickness and sine of ray angle.
Findings
Effective design formulas for flat and curved wedges.
Application of total-internal reflection principles.
Scalable design approach for light-guides.
Abstract
The space in front of a projector or camera can be folded into a light-guide by total-internal reflection if the guide is tapered like a wedge. This article explains how to calculate both flat and curved wedges by scaling a thin version designed using the principle that the product of thickness and the sin of ray angle is constant in a smoothly varying guide.
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Taxonomy
TopicsInteractive and Immersive Displays · Advanced optical system design · Advanced Materials and Mechanics