%0 Journal Article %T Properties of large CaF 2 crystals grown by CZ method for lens materials %A Yanagi, Hiroyuki %A Fukuda, Tsuguo %J Proceedings of SPIE %V 5377 %N 1 %P 1886-1893 %@ 0277-786X %D 2004-05-28 %I SPIE %~ DeepDyve