Optical write/read device and an information recording media
AssigneeOki Electric Industry Co., Ltd.
InventorsMinoru Isobe, Yukio Nakamura
Life of this patent
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Abstract
A method for optically writing/reading information is disclosed, where information is written onto and read from an information recording medium. Light is emitted from a light emitting element and is split into a zero-order diffracted light and a first-order diffracted light by way of a diffraction grating. The zero-order diffracted light and the first-order diffracted light are focused from the diffraction grating onto the information recording medium such that at least a portion of at least the first-order diffracted light is reflected from the information recording medium. The reflected first-order diffracted light is focused from the information recording medium onto a light receiving element paired with and positioned adjacent the light emitting element.
Claims9
A method for optically writing/reading information, where information is written onto and read from an information recording medium, the method comprising the steps of:
- emitting light from a light emitting element;
- splitting the emitted light into a zero-order diffracted light and a first-order diffracted light by way of a diffraction grating;
- focusing the zero-order diffracted light and the first-order diffracted light from the diffraction grating onto the information recording medium, at least a portion of at least the first-order diffracted light being reflected from the information recording medium;
- and
- focusing the reflected first-order diffracted light from the information recording medium onto a light receiving element paired with and positioned adjacent the light emitting element.
Dependencies are inferred from the claim text.