Optical recording medium
AssigneeSony Corporation
InventorYuichi Sabi
Life of this patent
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Abstract
The present invention relates to an optical recording medium having a plurality of recording layers having different uses. The optical recording medium includes a first light transmitting layer (32); a layer (31) composed of an organic dye for recording and reading data by an optical beam of a first wavelength incident through the first light transmitting layer (32) and transmitting an optical beam of a second wavelength incident through the first light transmitting layer (32); a second light transmitting layer (34) for transmitting the optical beam of the second wavelength incident through the layer (31) composed of the organic dye; and a reflecting layer (331) for reflecting the optical beam of the second wavelength incident through the second light transmitting layer (34).
Claims39
An optical recording medium comprising:
- a first light transmitting layer;
- a layer composed of an organic dye for recording and reading data by an optical beam of a first wavelength incident through the first light transmitting layer and transmitting an optical beam of a second wavelength incident through the first light transmitting layer;
- a second light transmitting layer for transmitting the optical beam of the second wavelength incident through the layer composed of the organic dye;
- and
- a reflecting layer for reflecting the optical beam of the second wavelength incident through the second light transmitting layer.
An optical recording medium comprising:
- a first light transmitting layer;
- a recording layer on which data is recorded and read by an optical beam of a first wavelength incident through the first light transmitting layer, and which transmits an optical beam of a second wavelength incident through the first light transmitting layer and has a refractive index under the first wavelength of the optical beam before recording larger than the refractive index of the first light transmitting layer and a refractive index under the first wavelength after recording substantially the same as the refractive index of the first light transmitting layer;
- a second light transmitting layer for transmitting the optical beam of the second wavelength incident through the recording layer;
- and
- a reflecting layer for reflecting the optical beam of the second wavelength incident through the second light transmitting layer.
Dependencies are inferred from the claim text.