Optical head with GRIN lens

Details Optical head with GRIN lens Optical head with GRIN lens

2005-10-25

2005-10-25

Hindi, Nabil (Department: 2655)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

Reexamination Certificate

active

06958968

ABSTRACT:
An optical head in which a graded index (GRIN) lens is provided. The optical head includes a slider connected to an arm and flying a predetermined distance above a recording layer for data recording, a GRIN lens mounted in the slider for focusing an incident beam to form a light spot of a predetermined size on its exit surface adjacent to the recording layer, and a light-emitting unit for emitting the incident light to the GRIN lens.

REFERENCES:
patent: 6243350 (2001-06-01), Knight et al.
patent: 6307832 (2001-10-01), Novotny et al.
patent: 6351436 (2002-02-01), Mallary
patent: 6582630 (2003-06-01), Jain et al.
patent: 1998-702610 (1998-08-01), None
patent: WO 98/09284 (1998-03-01), None

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