Rahm, M. Roberts, D. A. Pendry, J. B. Smith, D. R. Media 7: Transformation-optical design of adaptive beam bends and beam expanders Originally published in Optics Express on 21 July 2008 (oe-16-15-11555) adaptive beam bends;media;oe;Optics Express;21 July 2008;Transformation-optical;beam expanders 2008-07-21
    https://opticapublishing.figshare.com/articles/media/Media_7_Transformation-optical_design_of_adaptive_beam_bends_and_beam_expanders/4938083
10.1364/OE.16.011555.m007