Local light-ray rotation
Alasdair C. Hamilton, Bhuvanesh Sundar, John Nelson, and Johannes, Courtial
TL;DR
This paper introduces a novel optical sheet structure using Dove-prism sheets that can rotate light-ray directions arbitrarily around the sheet normal, with properties described by Mobius transforms.
Contribution
The work presents a new optical device design that achieves arbitrary local light-ray rotation using a pair of Dove-prism sheets, expanding control over light propagation.
Findings
The sheet structure effectively rotates light rays by arbitrary angles.
The direction of a point source is described by a Mobius transform.
Ray-tracing simulations demonstrate the device's properties.
Abstract
We present a sheet structure that rotates the local ray direction through an arbitrary angle around the sheet normal. The sheet structure consists of two parallel Dove-prism sheets, each of which flips one component of the local direction of transmitted light rays. Together, the two sheets rotate transmitted light rays around the sheet normal. We show that the direction under which a point light source is seen is given by a Mobius transform. We illustrate some of the properties with movies calculated by ray-tracing software.
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