Courtial, JohannesKirkpatrick, Blair C.Logean, EricScharf, Toralf2010-12-062010-12-062010-12-06201010.1364/OL.35.004060https://infoscience.epfl.ch/handle/20.500.14299/61918WOS:000284832200068We observe imaging through windows comprising pairs of confocal lenslet arrays that have different focal lengths but that are otherwise identical. Image space is stretched in the longitudinal direction only. Such windows are examples of METATOYs, optical components that can change light-ray direction in ways that appear wave-optically forbidden.ray-optical refractionlenslet arraystext::journal::journal article::research article