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      Law of refraction for generalised confocal lenslet arrays

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          Abstract

          We derive the law of generalised refraction for generalised confocal lenslet arrays, which are arrays of misaligned telescopes. We have implemented this law of refraction in TIM, a custom open-source ray tracer.

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          Optical properties of a Dove-prism sheet

          Alasdair Hamilton, Johannes Courtial (2008)
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            Local light-ray rotation

            Johannes Courtial, Alasdair Hamilton, Bhuvanesh Sundar … (2008)
            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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              Generalized refraction using lenslet arrays

              Alasdair Hamilton, Johannes Courtial (2009)
              We have recently started to investigate 2D arrays of confocal lens pairs. Miniaturization of the lens pairs can make the array behave ray-optically like a homogeneous medium. Here we generalize the geometry of the lens pairs. These generalisations include a sideways shift of the lens centres and a change in the orientation of both lenses in each pair. We investigate the basic ray optics of the resulting arrays, and illustrate these with movies rendered using ray-tracing software. We suggest that confocal lenslet arrays could be used to realize ray-optically some recent metamaterials concepts such as the coordinate-transform design paradigm.
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                Author and article information

                Journal
                Publication date Created: 07 June 2013
                Publication date Updated: 2013-08-19
                Article
                DOI: 10.1016/j.optcom.2013.10.017
                ArXiV ID: 1306.1814
                SO-VID: e847219d-2a49-4eee-a4ad-167e8461fe76
                License:

                http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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                Comments 4 pages, 3 figures
                Categories physics.optics

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