Tilt detection apparatus, hologram apparatus, tilt...

Details Tilt detection apparatus, hologram apparatus, tilt... Tilt detection apparatus, hologram apparatus, tilt...

2005-12-15

2008-12-02

Amari, Alessandro (Department: 2872)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S053190

Reexamination Certificate

active

07460447

ABSTRACT:
A tilt detection apparatus for a medium comprises a tilt detection beam generator that makes a tilt detection beam incident ion a medium to detect whether the medium is tilted with respect to a reference position; a light reception unit that receives the tilt detection beam that after striking the medium, has come from the medium; and a correction output unit that outputs a signal to correct a tilt of the medium, based on a difference in light reception position on the light reception unit between a position at which the light reception unit receives the tilt detection beam and a position at which the light reception unit is to receive the tilt detection beam when the medium is in the reference position.

REFERENCES:
patent: 6545958 (2003-04-01), Hirai et al.
patent: 7116626 (2006-10-01), Woods et al.
patent: 2004/0037196 (2004-02-01), Matsumoto et al.
patent: 2002-216359 (2002-08-01), None
patent: 2004-158114 (2004-06-01), None
patent: 2004-177958 (2004-06-01), None
patent: 2004-272268 (2004-09-01), None

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