Optical disk apparatus using tilt and aberration correction...

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C369S044110, C369S053190, C369S059220

Reexamination Certificate

active

07145848

ABSTRACT:
A tilt control apparatus includes an orthogonal shift detector (9) which detects an orthogonal shift by comparing a pair of a plurality of tap coefficients (C1, . . . , C7) of a FIR filter and generates an orthogonal shift signal, and an actuator varies the inclination of the optical axis of the light beam to correct the orthogonal shift, and a tilt controller (10) controls the drive of the actuator in accordance with the orhogonal shift signal to minimize the orthogonal shift. In the information recording operation, the orthogonal shift obtained based on a recording track is previously stored in a temporary storage portion and the stored orthogonal shift is used to conduct the tilt control.

REFERENCES:
patent: 5253239 (1993-10-01), Edahiro et al.
patent: 5442615 (1995-08-01), Ohsato et al.
patent: 5546367 (1996-08-01), Yoshimura et al.
patent: 5719847 (1998-02-01), Tateishi et al.
patent: 5805543 (1998-09-01), Takamine et al.
patent: 5848045 (1998-12-01), Kirino et al.
patent: 5870372 (1999-02-01), Kuribayashi
patent: 5886496 (1999-03-01), Furukawa et al.
patent: 5886962 (1999-03-01), Takamine et al.
patent: 5909413 (1999-06-01), Araki
patent: 6198465 (2001-03-01), Furukawa et al.
patent: 6246648 (2001-06-01), Kuribayashi
patent: 6324133 (2001-11-01), Ichimura
patent: 61-51630 (1986-03-01), None
patent: 5-174406 (1993-07-01), None
patent: 8-115528 (1996-05-01), None
patent: 8-293126 (1996-11-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Optical disk apparatus using tilt and aberration correction... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical disk apparatus using tilt and aberration correction..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disk apparatus using tilt and aberration correction... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3719963

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.