Magnetic recording apparatus having a reduced thickness

Details Magnetic recording apparatus having a reduced thickness Magnetic recording apparatus having a reduced thickness

1998-04-24

2000-04-25

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7703, G11B 5596

Patent

active

060551224

ABSTRACT:
A holographic unit for applying light to a recording medium comprises an optical path, a first optical diffracting member, a second optical diffracting member, an optical condensing member, a first entrance/exit surface disposed at a predetermined first angle to a first reflecting surface, and a second entrance/exit surface disposed at a predetermined second angle to a second reflecting surface to project a plurality of light beams so that the plurality of light beams fall on a position sensing track formed on a recording medium perpendicularly to the surface of the recording medium.

REFERENCES:
patent: 5121371 (1992-06-01), Farnsworth et al.
patent: 5311378 (1994-05-01), Williams et al.
patent: 5999498 (1999-12-01), Handa et al.

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