TY - JOUR A1 - Großmann, Michael A1 - Möllmann, Klaus-Peter A1 - Vollmer, Michael T1 - Artificially generated halos: rotating sample crystals around various axes T2 - Appield Optics 54 (2015) 4, B97-B106 N2 - Abstract So far experiments with artificial halos from single transparent crystals have suffered from the lack of apparatus that allows simultaneous rotation around two and three axes. A new setup is presented which overcomes these restrictions by combining electrical as well as pneumatic concepts. This enables reproducible experiments of the most common halos observed in nature and for the first time artificial ring halos from single hexagons rotating around three axes simultaneously. In addition, an old qualitative halo demonstration based on perceived colors of rotating colored areas whose contours represent scattering plots has been reinvestigated and the usually nonsaturated color of artificial parhelia was visualized using a crossed prism method. These new experiments are discussed in the context of all known artificial halo experiments. © 2014 Optical Society of America Y1 - 2015 UR - https://opus4.kobv.de/opus4-fhbrb/frontdoor/index/index/docId/1311 SP - B97 EP - B106 ER -