Optical disc, information recording method, and information reproducing method

Abstract

According to one embodiment, a re-recordable write-once optical disc by which recording/reproducing can be properly done with a short-wavelength blue laser is provided. The disc has recording layers on which marks are recorded by the laser power of a modulated short wavelength, with a space formed between the recorded marks. The recording layer of the disc uses an organic dye material by which no physical modification or no physical change substantially occurs in an area of the recorded marks.

1 . (canceled) 
     
     
         2 . An information medium comprising:
 first and second recording layers configured to record or reproduce information by light with a predetermined wavelength,   wherein the first or second layer comprises a metal complex.   
     
     
         3 . An information recording method using an information medium comprising first and second recording layers configured to record or reproduce information by light with a predetermined wavelength, the first or second layer comprising a metal complex, the information recording method comprising:
 recording the information on the first or second recording layer using the light.   
     
     
         4 . An information reproducing method using an information medium comprising first and second recording layers configured to record or reproduce information by light with a predetermined wavelength, the first or second layer comprising a metal complex, the information reproducing method comprising:
 reproducing the information from the first or second recording layer using the light.   
     
     
         5 . An information recording apparatus using the information medium as defined in  claim 2 , the information recording apparatus comprising:
 a module configured to record the information on the first or second recording layer using the light.   
     
     
         6 . An information reproducing apparatus using the information medium as defined in  claim 2 , the information reproducing apparatus comprising:
 a module configured to reproduce the information from the first or second recording layer using the light.