Optical recording medium
AssigneePioneer Corporation
InventorsAyumi Mitsumori, Takuma Yanagisawa, Takanobu Higuchi
Life of this patent
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Abstract
A multilayer optical recording medium in which, as a recording layer is located farther from a surface of incidence of a light beam for reading, the amount of light that reaches the surface of incidence after being reflected off the recording layer is smaller.
Claims9
A multilayer optical recording medium with at least three stacked recording layers, wherein, as a recording layer is located farther from a surface of incidence of a light beam for reading, an amount of light that reaches the surface of incidence after being reflected off the recording layer is smaller;
- and
- wherein the amount of light reflected back from the recording layer located farthest from the surface of incidence is 0.5 times or more the amount of light reflected back from the recording layer located nearest the surface of incidence.
A multilayer optical recording medium with at least three stacked recording layers, wherein, as a recording layer is located farther from a surface of incidence of a light beam for reading, an amount of light that reaches the surface of incidence after being reflected off the recording layer is smaller, wherein different interlayer distances are alternately employed between adjacent recording layers.
A multilayer optical recording medium with at least three stacked recording layers, wherein, as a recording layer is located farther from a surface of incidence of a light beam for reading, an amount of light that reaches the surface of incidence after being reflected off the recording layer is smaller, wherein an amount of light reflected back from a recording layer located farthest from the surface of incidence is 0.8 times or less an amount of light reflected back from a recording layer located nearest the surface of incidence, and
- wherein different interlayer distances are alternately employed between adjacent recording layers.
A multilayer optical recording medium with at least three stacked recording layers, wherein, as a recording layer is located farther from a surface of incidence of a light beam for reading, an amount of light that reaches the surface of incidence after being reflected off the recording layer is smaller,
- wherein the amount of reflected light linearly decreases in the order from the recording layer located nearest the surface of incidence to the recording layer located farthest from the surface of incidence, and
- wherein different interlayer distances are alternately employed between adjacent recording layers.
Dependencies are inferred from the claim text.