Experimental observation of moire angles in parallax barrier 3D displays

Abstract

Angles of visible moire patterns are observed experimentally. Experiments were made across the angular range 0 - 90 degrees in a wide range of parameters. Two kinds of clusterization were observed, ray and discrete. In rational cells (LCD pixels), the moire patterns appear at a few fixed discrete angles. The list of preferable moire-less angles is presented basing on the experimental data; preferable areas in the parameter space are found. The problem of minimization of the moir effect is formulated as the Diophantine inequality with complex coefficients. The classification of moir angles basing on the probability of the moir effect can be practically useful. (C) 2014 Optical Society of America