Patent ID: 6995882

Claim:
An optical information recording apparatus for recording information in an optical information recording medium having reflecting layer and information recording layer in which information is recorded utilizing holography, said apparatus comprising: an input means for inputting individual information that is unique to an individual; an information light generation means for generating information light carrying two dimensional digital pattern information to be recorded on said optical information recording medium; a phase modulation pattern generation means for generating phase modulation pattern information based on said individual information inputted by said input means; a recording reference light generation means, including phase modulation means for spatially modulating a phase of light, for generating reference light for recording having a phase spatially modulated based on said phase modulation pattern information by said phase modulation means; a recording optical system for illuminating said information recording layer on a same side thereof with said information light and said reference light for recording so that said information is recorded in said information recording layer in a form of an interference pattern as a result of using the reflecting layer as a reference plane to generate interference between said information light and said reference light for recording and so that an optical axis of said information light and an optical axis of said reference light for recording are located on a same line.