Optical disc and optical disc device
AssigneePioneer Corporation
InventorsKazuo Kuroda, Eiji Muramatsu
Life of this patent
Estimating the term…
Abstract
Provided herein is an optical disc having: an optical plotting layer which is formed at a label surface side and on which an image is formed by heat change with a laser beam emitted from a recording surface side; a protective layer which is formed at the label surface side of the optical plotting layer, protects the optical plotting layer, and through which the image can be viewed from the label surface side; a reflective layer which is formed at the recording surface side of the optical plotting layer and reflects the laser beam; and a substrate which supports the reflective layer, the protective layer and the optical plotting layer.
Claims9
An optical disc comprising:
- an optical plotting layer that is formed at a label surface side and on which an image is formed by heat change with a CD laser beam emitted from a recording surface side;
- a protective layer that is formed at the label surface side of the optical plotting layer, protects the optical plotting layer, and through which the image can be viewed from the label surface side;
- a reflective layer that is formed at the recording surface side of the optical plotting layer and reflects the CD laser beam;
- a substrate that supports the reflective layer, the protective layer and the optical plotting layer;
- a bonded substrate laminated at the recording surface side of the substrate;
- and
- an information recording layer formed at a bonded side of the bonded substrate and on which information is recorded and/or reproduced with a DVD laser beam;
- wherein the information recording layer has a wavelength selectivity transmitting reflective film that reflects the DVD laser beam and transmits the CD laser beam.
2-3. (canceled)
10-11. (canceled)
Dependencies are inferred from the claim text.