Liquid immersion lens for optical data storage

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 4411, G11B 700

Patent

active

060848464

ABSTRACT:
A slider for an optical read head includes a liquid-immersion-lens between an objective lens and an optically transparent base of the slider. The liquid-immersion-lens includes a high index of refraction liquid, thereby eliminating a lens-air interface at the lower surface of the objective lens. The liquid-immersion-lens provides for the production of a small light spot at the surface of the optical disc.

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