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Near-field read-out of a 50-GB first-surface disc with NA=1.9 and a proposal for a cover-layer-incident, dual-layer near-field system
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2004
Year
EngineeringOptic DesignOptical TestingDual-layer Near-field SystemLight PathOptical PropertiesNear-field Read-outComputational ImagingComputational ElectromagneticsOptical SystemsBlue LaserInstrumentationPhotonicsElectrical EngineeringLight Field ImagingOphthalmologyComputer EngineeringGb DiskOptical Information ProcessingOptical EngineeringOptoelectronics50-Gb First-surface Disc
We present read-out results of a 50 GB disk with a blue laser and a NA=1.9 Solid Immersion Lens in a conventional focus and tracking actuator. Furthermore, we show a light path and a disk design that enable cover-layer incident near field recording on dual-layer disks with a capacity of 300 GB on a double-sided disk.