Optical disk apparatus using mechanism for controlling...

Details Optical disk apparatus using mechanism for controlling... Optical disk apparatus using mechanism for controlling...

2007-10-16

2007-10-16

Korzuch, William (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S112070, C369S044230, C369S112020

Reexamination Certificate

active

11270613

ABSTRACT:
In the past there has been a problem that on a detection surface the influence of interference causes a defocusing signal to degrade, narrowing the range in which spherical aberration can be stably detected. Accordingly, a diffraction grating is used to focus the inner and outer sides of luminous flux on separate optical detectors before the optical flux is focused on an optical detector and defocusing signals are independently calculated to find the difference therebetween, thereby providing a spherical aberration signal. This makes it possible to detect spherical aberration signals more stably.

REFERENCES:
patent: 5113378 (1992-05-01), Kimura
patent: 5224084 (1993-06-01), Takahashi
patent: 5446565 (1995-08-01), Komma et al.
patent: 5648950 (1997-07-01), Takeda et al.
patent: 5652744 (1997-07-01), Freeman et al.
patent: 5717678 (1998-02-01), Akiyama
patent: 5787061 (1998-07-01), Tsuchiya et al.
patent: 5835471 (1998-11-01), Miyamoto et al.
patent: 5909418 (1999-06-01), Noda et al.
patent: 5920532 (1999-07-01), Yagi et al.
patent: 6400671 (2002-06-01), Hayashi et al.
patent: 6826133 (2004-11-01), Ichimura et al.
patent: 9-128785 (1997-05-01), None
patent: 11-110768 (1999-04-01), None
patent: 11-195229 (1999-07-01), None
patent: 2000-40237 (2000-02-01), None
patent: 2000-57616 (2000-02-01), None
patent: 2000-215505 (2000-08-01), None
patent: 2001-507463 (2001-06-01), None

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