Holographic recording medium

Abstract

A holographic recording medium according to the present invention includes a holographic material layer in which information is to be recorded by irradiating the same region with information light corresponding to the information to be recorded and reference light to read the recorded information. The holographic material layer is divided into a plurality of recording zones by a plurality of light shielding walls. The light shielding wall is formed of a material which does not transmit bleaching light to be applied to the recording zone in which a recording process has been performed and the recorded information is to be fixed.

1 . A holographic recording medium comprising: 
 a holographic material layer in which information is to be recorded by irradiating the same region with information light corresponding to the information to be recorded and reference light to read the recorded information, wherein    the holographic material layer is divided into a plurality of recording zones by a plurality of light shielding walls, and    the light shielding wall is formed of a material which does not transmit bleaching light irradiated for fixing the recorded information to the recording zone in which a recording process has been performed.    
   
   
       2 . The holographic recording medium according to  claim 1 , wherein 
 the light shielding wall reflects or absorbs the bleaching light so that the bleaching light proceeds only to a recording zone in which the recorded information is to be fixed, and    the bleaching light does not proceed to a recording zone adjacent to the recording zone in which the recorded information is to be fixed.    
   
   
       3 . The holographic recording medium according to  claim 1 , wherein 
 the light shielding wall includes either acrylic or polycarbonate material.    
   
   
       4 . The holographic recording medium according to  claim 1 , wherein 
 the holographic material layer is formed on a disk-shaped or polygonal substrate,    the light shielding wall is formed on the substrate and in the holographic material layer in a latticed pattern, and    the recording zone is a region surrounded by the lattice-shaped light shielding walls.    
   
   
       5 - 6 . (canceled)