Optical signal recording medium and information recording/reproducing apparatus
View Patent ↗An optical signal recording medium includes at least one signal recoding plane in which an optical signal is to be recorded, and a control information region which is a portion other than the signal recoding plane, and in which a diffraction grating is disposed.
1. An optical signal recording medium comprising:
at least one signal recording portion in which an optical signal is to be recorded; and
a control information region which is a portion other than the signal recording plane, and in which at least one of a diffraction grating or a light reflecting member is disposed,
wherein the control information region is provided on a side face of the optical signal recording medium,
wherein the optical signal recording medium further comprises a principal face on which the optical signal to be recorded is incident; and
wherein the side face extends at an angle other than 180° relative to the principal face.
2. The optical signal recording medium according to claim 1 , wherein the side face comprises a portion which is parallel to an optical axis of a light beam for recording a signal into the signal recording portion, or reproducing a signal from the signal recording portion.
3. The optical signal recording medium according to claim 1 , wherein the side face has a curved surface.
4. The optical signal recording medium according to claim 2 , wherein the side face has a curved surface.
5. The optical signal recording medium according to claim 1 , wherein the at least one of the diffraction grating or the light reflecting member is a hologram indicating different information depending on a location.
6. The optical signal recording medium according to claim 2 , wherein the at least one of the diffraction grating or the light reflecting member is a hologram indicating different information depending on a location.
7. The optical signal recording medium according to claim 3 , wherein the at least one of the diffraction grating or the light reflecting member is a hologram indicating different information depending on a location.
8. The optical signal recording medium according to claim 4 , wherein the at least one of the diffraction grating or the light reflecting member is a hologram indicating different information depending on a location.
9. The optical signal recording medium according to claim 1 , wherein an identification information recording portion indicating a reference position of the optical signal recording medium is disposed in the control information region.
10. The optical signal recording medium according to claim 2 , wherein an identification information recording portion indicating a reference position of the optical signal recording medium is disposed in the control information region.
11. The optical signal recording medium according to claim 3 , wherein an identification information recording portion indicating a reference position of the optical signal recording medium is disposed in the control information region.
12. The optical signal recording medium according to claim 4 , wherein an identification information recording portion indicating a reference position of the optical signal recording medium is disposed in the control information region.
13. The optical signal recording medium according to claim 5 , wherein an identification information recording portion indicating a reference position of the optical signal recording medium is disposed in the control information region.
14. The optical signal recording medium according to claim 6 , wherein an identification information recording portion indicating a reference position of the optical signal recording medium is disposed in the control information region.
15. The optical signal recording medium according to claim 7 , wherein an identification information recording portion indicating a reference position of the optical signal recording medium is disposed in the control information region.
16. The optical signal recording medium according to claim 8 , wherein an identification information recording portion indicating a reference position of the optical signal recording medium is disposed in the control information region.
17. An information recording/reproducing apparatus comprising:
a supporting portion which supports an optical signal recording medium having:
at least one signal recording portion in which an optical signal is to be recorded; and
a control information region which is a portion other than the signal recording portion, and in which at least one of a diffraction grating or a light reflecting member is disposed;
wherein the control information region is provided on a side face of the optical signal recording medium;
an optical information processing portion which irradiates the signal recording portion of the optical signal recording medium with a light beam including information to be recorded, or which irradiates the signal recording portion of the optical signal recording medium with a light beam for reproducing an optical signal recorded in the signal recording portion of the optical signal recording medium; and
a positioning controlling portion which irradiates the at least one of the diffraction grating or the light reflecting member disposed in the control information region, with a light beam that is different from the light beam emitted by the optical information processing portion, which detects transmitted or reflected light from the at least one of the diffraction grating or the light reflecting member, and which performs positioning between the optical signal recording medium and the light beam emitted by the optical information processing portion,
wherein the optical medium further comprises a principal face on which the optical signal to be recorded is incident; and
wherein the side face extends at an angle other than 180° relative to the principal face.
18. The optical signal recording medium according to claim 3 , wherein the control information region is configured to provide control information regarding a rotation angle of the optical signal recording medium.