An object of the invention is to simplify the configuration of an optical system for recording or reproduction without causing a reduction in the amount of information. For recording, a spatial light modulator (27) generates information light by spatially modulating light according to information to...http://www.google.com.au/patents/US20040027968?utm_source=gb-gplus-sharePatent US20040027968 - Optical information recording apparatus and method, optical information reproducing apparatus and method, optical information recording reproducing apparatus and method and optical information recording medium
