Optical information recording/reproducing device
AssigneePanasonic Corporation
InventorTeruhiro Shiono
Life of this patent
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Abstract
An optical information recording/reproducing device is provided with a first light source 20a for emitting recording light 22a, a second light source 20b for emitting reproducing light 22b, an objective lens 6 for focusing the emitted lights from the both light sources 20a, 20b on an information recording medium including a recording region 3 capable of three-dimensional recording and photodetectors 19a, 19b for detecting reflected lights 7a′, 7b′ from the information recording medium, and records information on recording layers 1a to 1e utilizing a nonlinear absorption phenomenon. At the objective lens 6, an average rim intensity of the recording light 7a is lower than that of the reproducing light 7b.
Claims27
1-26. (canceled)
An optical information recording/reproducing device, comprising:
- a light source unit for emitting recording light and reproducing light;
- an objective lens for focusing the recording and reproducing lights on an information recording medium;
- and
- a photodetector for detecting the light reflected from the information recording medium,
- wherein:
- the information recording medium includes a recording region capable of three-dimensionally recording information by the recording light utilizing a nonlinear absorption phenomenon, and
- an average rim intensity of the recording light at the objective lens is lower than that of the reproducing light.
Dependencies are inferred from the claim text.