Optical recording medium
AssigneeKonica Corporation
InventorHiroshi Hirayama
Life of this patent
Estimating the term…
Abstract
In an optical recording medium for conducting at least one of reading and recording of optical information, the optical recording medium includes: a base board; and an antireflection layer composed of at least one layer, which is provided on a surface of a side of the base board where light enters for conducting at least one of the reading and recording of information. A wavelength of light that makes reflectance of the antireflection layer to light to be smallest is longer than that of the light that enters for conducting at least one of the reading and recording of information.
Claims26
An optical recording medium for conducting at least one of reading and recording of optical information, the optical recording medium comprising:
- (a) a base board;
- and
- (b) an antireflection layer composed of at least one layer, being provided on a surface of a side of the base board where light enters for conducting at least one of the reading and recording of information,
- wherein a wavelength of light that makes reflectance of the antireflection layer to light to be smallest is longer than that of the light that enters for conducting at least one of the reading and recording of information.
An optical recording medium conducting at least one of reading and recording of information by means of light, comprising:
- (a) a base board;
- and
- (b) an optical layer provided on a side of the base board where light enters for conducting at least one of reading and recording of information, the optical layer composed of at least one layer having smaller transmittance for light when an incident angle is smaller within a range of a prescribed incident angle for light.
An optical recording medium conducting at least one of reading and recording of information by means of light, comprising:
- (a) a base board;
- and
- (b) an optical layer provided on a side of the base board where light enters for conducting at least one of the reading and recording of information, the optical layer composed of at least one layer having smaller transmittance for light when an incident angle is greater within a range of a prescribed incident angle for light.
An optical recording medium conducting at least one of reading and recording of information by means of light, comprising:
- (a) a base board;
- and
- (b) an optical layer provided on a side of the base board where light enters for conducting at least one of the reading and recording of information, the optical layer composed of at least one layer and having different transmittances on both sides of a boundary of a prescribed wavelength.
A method of recording and reading of information, comprising the steps of:
- (a) converging light with an objective lens;
- and
- (b) making the converged light to pass through an antireflection layer first composed of at least one layer provided an optical recording medium;
- and
- (c) conducting at least one of recording and reading of information by light having a wavelength shorter than a wavelength of light which makes reflectance of the antireflection layer for light to be minimum.
A method of recording and reading of information, comprising the step of:
- (a) converging light with an objective lens;
- and
- (b) making the converged light to pass through an optical layer composed of at least one or more layers provided on an optical recording medium so that transmittance for the light may be smaller when an incident angle for the light is smaller within a range of a prescribed incident angle, thereby conducting at least one of the recording and reading of information for the optical recording medium.
A method of recording and reading of information, comprising the step of:
- (a) converging light with an objective lens;
- and
- (b) making the converged light to pass through an optical layer composed of at least one or more layers provided on an optical recording medium so that transmittance for the light may be smaller when an incident angle for the light is greater within a range of a prescribed incident angle, thereby conducting at least one of the recording and reading of information for the optical recording medium.
A method of recording and reading of information, the method comprising the step of:
- (a) converging light with an objective lens;
- and
- (b) making the converged light to pass through an optical layer composed of at least one or more layers provided on an optical recording medium so that transmittances for the light may be different each other on both sides of a boundary of a prescribed wavelength, thereby conducting at least one of recording and reading of information for the optical recording medium.
Dependencies are inferred from the claim text.