Optical information recording method, optical information recording apparatus and optical information recording medium
First Claim
1. A method for recording optical information on an optical information recording medium, comprising:
- applying a fixing beam onto at least a portion of an exposed region of a recording layer of the optical information recording medium, the recording layer recording information by holography, at an exposure level T (mJ/cm2) that satisfies the condition H<
(S+T)<
2H (where S is an integrated exposure level (mJ/cm2), which is the total of the exposure level in each predetermined region that constitutes the exposed region where an interference image has been recorded by irradiating the recording layer with an information beam and a reference beam, and H is a minimum fixing exposure level (mJ/cm2) required to fix the interference image).
1 Assignment
0 Petitions
Accused Products
Abstract
To provide an excellent optical information recording method, optical information recording medium and optical information recording apparatus both of which use the method. The method generates no excessively-exposed region, can sufficiently fix recorded information, and never reduce the sensitivity of non-recorded regions. This is achieved because the method applies a fixing beam onto at least a portion of an exposed region of a recording layer of the optical information recording medium, the recording layer recording information by holography, at an exposure level T (mJ/cm2) that satisfies the condition H<(S+T)<2H (where S is an integrated exposure level (mJ/cm2), which is the total of the exposure level in each predetermined region that constitutes the exposed region where an interference image has been recorded by irradiating the recording layer with an information beam and a reference beam, and H is a minimum fixing exposure level (mJ/cm2) required to fix the interference image).
92 Citations
17 Claims
-
1. A method for recording optical information on an optical information recording medium, comprising:
applying a fixing beam onto at least a portion of an exposed region of a recording layer of the optical information recording medium, the recording layer recording information by holography, at an exposure level T (mJ/cm2) that satisfies the condition H<
(S+T)<
2H (where S is an integrated exposure level (mJ/cm2), which is the total of the exposure level in each predetermined region that constitutes the exposed region where an interference image has been recorded by irradiating the recording layer with an information beam and a reference beam, and H is a minimum fixing exposure level (mJ/cm2) required to fix the interference image).- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
14. An optical information recording apparatus for an optical information recording medium, comprising:
a fixing beam application unit configured to apply a fixing beam onto at least a portion of an exposed region of a recording layer of the optical information recording medium, the recording layer recording information by holography, at an exposure level T (mJ/cm2) that satisfies the condition H<
(S+T)<
2H (where S is an integrated exposure level (mJ/cm2), which is the total of the exposure level in each predetermined region that constitutes the exposed region where an interference image has been recorded by irradiating the recording layer with an information beam and a reference beam, and H is a minimum fixing exposure level (mJ/cm2) required to fix the interference image).
-
15. An optical information recording medium, comprising:
-
an interference image recorded by means of a method for recording optical information on an optical information recording, wherein the method comprises; applying a fixing beam onto at least a portion of an exposed region of a recording layer of the optical information recording medium, the recording layer recording information by holography, at an exposure level T (mJ/cm2) that satisfies the condition H<
(S+T)<
2H (where S is an integrated exposure level (mJ/cm2), which is the total of the exposure level in each predetermined region that constitutes the exposed region where an interference image has been recorded by irradiating the recording layer with an information beam and a reference beam, and H is a minimum fixing exposure level (mJ/cm2) required to fix the interference image).
-
-
16. A method for reproducing optical information, comprising:
-
applying a reference beam onto an interference image to reproduce recorded information corresponding to the interference image, wherein the interference image is formed in a recording layer by means of a method for recording optical information on an optical information recording medium having a recording layer recording information by holography, wherein the method comprises; applying a fixing beam onto at least a portion of an exposed region of the recording layer at an exposure level T (mJ/cm2) that satisfies the condition H<
(S+T)<
2H (where S is an integrated exposure level (mJ/cm2), which is the total of the exposure level in each predetermined region that constitutes the exposed region where an interference image has been recorded by irradiating the recording layer with an information beam and a reference beam, and H is a minimum fixing exposure level (mJ/cm2) required to fix the interference image). - View Dependent Claims (17)
-
Specification