公开(公告)号：EP1166184A4

公开(公告)日：2004-05-19

申请号：EP00906055

申请日：2000-02-16

申请人： UNIV VICTORIA

发明人： GU MIN ,  DAY DANIEL JOHN ,  SMALLRIDGE ANDREW JOHN

IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/0055 ,  G11B7/013 ,  G11B7/24 ,  G11B7/245 ,  G03G5/07 ,  C08K5/23 ,  C08K5/32 ,  C08K5/3417

CPC分类号： G11B7/245 ,  B82Y10/00 ,  G11B7/0045 ,  G11B7/0055 ,  G11B7/24038 ,  G11B7/24085 ,  G11B2007/0009

摘要： A method of erasable/rewritable optical data storage is provided in which a laser beam from a laser (10) operated in either a pulsed or continuous wave mode is focussed by an optical system (11-18) onto a photorefractive polymeric material (32) to cause two photon excitation of the material to record data which may subsequently be erased by illuminating the material with radiation having a wavelength in the ultraviolet or visible spectrum to erase the recorded data. New photorefractive polymeric materials having a relatively narrow absorption band for use in the method are also disclosed.