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High-Density Near-Field Readout over 50 GB Capacity Using Solid Immersion Lens with High Refractive Index
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2003
Year
Optical MaterialsEngineeringOptic DesignOptical TestingFiber OpticsOptical PropertiesOptical SystemsPhotonicsLight Field ImagingHigh Refractive IndexOphthalmologyOptoelectronicsSolid ImmersionGeometrical OpticApplied PhysicsHigh-density Near-field ReadoutOptical Information ProcessingOptical EngineeringOptical System Analysis
We have investigated high-density near-field readout using a solid immersion lens with a high refractive index. By using a glass material with a high refractive index of 2.08, we developed an optical pick-up with the effective numerical aperture of 1.8. We could observe a clear eye pattern for a 50 GB capacity disc in 120 mm diameter. We confirmed that the near-field readout system is promising method of realizing a high-density optical disc system.