High-efficiency aerial display using a liquid crystal polarization grating, a retroreflector array, and a right-angle prism.
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DOI: 10.1364/ao.390629
Abstract: An aerial display scheme consisting of an orthogonal circular polarization grating (OCPG), a waveplate, a retroreflector array (RRA), and a right-angle prism (RAP) was developed. Because of the OCPG's functionality, retroreflected light from the RRA… read more here.
Keywords: retroreflector array; aerial display; display; polarization grating ... See more keywords