Optical disk
An optical disk is provided for recording data thereon as optically readable pits formed thereon and for reading data from the pits by means of a reproducing laser beam. The disk has a substrate of a light transmissive material. A reflective layer of a light reflective material is formed on one of t...
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Main Author | |
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Format | Patent |
Language | English |
Published |
15.07.1997
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Edition | 6 |
Subjects | |
Online Access | Get full text |
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Summary: | An optical disk is provided for recording data thereon as optically readable pits formed thereon and for reading data from the pits by means of a reproducing laser beam. The disk has a substrate of a light transmissive material. A reflective layer of a light reflective material is formed on one of the surfaces of the substrate. A light absorbing layer is formed on the other surface of the substrate on which the reproducing laser beam is projected. The light absorbing layer containing a coloring substance exhibiting light absorption characteristics that is small for the reproducing laser beam but large for a laser beam of a specific light wavelength band shifted from the reproducing laser beam wavelength band to a longer light wavelength side. The substrate may be of a colored substrate including the coloring substance. The light absorbing layer is not required in this case. |
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Bibliography: | Application Number: US19960594179 |