Solid immersion lens with semiconductor material to achieve high

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium

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369 4414, 369 4423, 369 13, 359664, G11B 7125

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active

06091694&

ABSTRACT:
An immersion system for a magneto-optical storage device has a spherical-segment-shaped lens. The lens is formed of material that is transparent to the electromagnetic radiation of the wavelength .lambda. at which the device is operated, and preferably of a semiconductor material. The lens has a first refractive index n.sub.1 which is greater than that of air. A layer with a higher refractive index than the lens is disposed in the propagation path of the electromagnetic radiation. The layer is composed of a material with a second refractive index n.sub.2 that is greater than the first refractive index n.sub.1 of the material of the lens.

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