Optical information recording and reproducing apparatus
AssigneeHitachi, Ltd.
InventorTakeshi Ogata
Life of this patent
Estimating the term…
Abstract
An optical information recording and reproducing apparatus includes an optical pickup, a phase conjugate optical system, a disc cure optical system, and a defect discrimination optical system; and an optical detector that receives a light emitted from the defect discrimination optical system and transmitted through or reflected from an optical information recording medium. A reference light and a signal light emitted from the optical pickup are irradiated onto the optical information recording medium to record and reproduce digital information by using a holography.
Claims20
An optical information recording and reproducing apparatus configured to irradiate a reference light emitted from an optical pickup and a signal light emitted from the optical pickup to record, and to reproduce digital information by using holography, the optical information recording and reproducing apparatus comprising:
- an optical pickup;
- a phase conjugate optical system;
- a disc cure optical system;
- a defect discrimination optical system;
- and an optical detector configured to receive a light emitted from the defect discrimination optical system and transmitted through or reflected from an optical information recording medium;
- wherein the optical information recording and reproducing apparatus is configured to determine, after receiving data to be recorded on an optical information recording medium and before or during pre-curing an area designated for recording received data on the optical information recording medium, whether or not a defect is present in the area designated for recording received data on the optical information recording medium based on the light emitted from the defect discrimination optical system;
- and wherein if a defect is found, changing the area designated for recording received data on the optical information recording medium, but if no defect is found, proceeding with pre-curing the area designated for recording received data on the optical information recording medium.
An optical information recording and reproducing apparatus configured to irradiate a reference light emitted from an optical pickup and a signal light emitted from the optical pickup to record, and to reproduce digital information by using holography, the optical information recording and reproducing apparatus comprising:
- an optical pickup;
- a phase conjugate optical system;
- a disc cure optical system;
- and an optical detector configured to receive a light emitted from the disc cure optical system and transmitted through or reflected from an optical information recording medium;
- wherein the optical information recording and reproducing apparatus is configured to determine, after receiving data to be recorded on an optical information recording medium and before or during pre-curing an area designated for recording received data on the optical information recording medium, whether or not a defect is present in the area designated for recording received data on the optical information recording medium based on the light emitted from the defect discrimination optical system;
- and wherein if a defect is found, changing the area designated for recording received data on the optical information recording medium, but if no defect is found, proceeding with pre-curing the area designated for recording received data on the optical information recording medium.
An optical information recording and reproducing apparatus configured to irradiate a reference light and a signal light emitted from an optical pickup to record, and to reproduce digital information by using holography, the optical information recording and reproducing apparatus comprising:
- an optical pickup;
- and a phase conjugate optical system;
- wherein the optical information recording and reproducing apparatus is configured to determine, after receiving data to be recorded on an optical information recording medium and before or during pre-curing an area designated for recording received data on the optical information recording medium, whether or not a defect is present in the area designated for recording received data on the optical information recording medium based on a light quantity of a transmitted light or a reflected light of either the reference light or the signal light irradiated onto an optical information recording medium;
- wherein if a defect is found, changing the area designated for recording received data on the optical information recording medium, but if no defect is found, proceeding with pre-curing the area designated for recording received data on the optical information recording medium;
- and wherein whether a recording of information is continued or discontinued is determined based on a light quantity of a transmitted light or a reflected light of either the reference light or the signal light irradiated onto an optical information recording medium when recording data on the optical information recording medium.
Dependencies are inferred from the claim text.