Focusing servo system and focus servo acquisition enable with mu

Details Focusing servo system and focus servo acquisition enable with mu Focusing servo system and focus servo acquisition enable with mu

1997-02-18

1998-04-28

Tran, Thang V.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4429, 369 4425, 369 4435, G11B 709

Patent

active

057454507

ABSTRACT:
A focusing servo system includes an objective lens which is driven to move toward and/or away from a recording medium during focus searching operations. The objective lens is driven at a first relatively high velocity and then switches to a second relatively low velocity based on a focus acquisition enable signal or on an in-focus detection signal. After the focus searching operations, the movement of the objective lens may be servo-controlled.

REFERENCES:
patent: 4368526 (1983-01-01), Harigae et al.
patent: 4544837 (1985-10-01), Tanaka et al.
patent: 4998233 (1991-03-01), Dimatteo et al.
patent: 5060215 (1991-10-01), Kawamura et al.
patent: 5162661 (1992-11-01), Sato et al.
patent: 5187696 (1993-02-01), Ishii et al.
patent: 5202871 (1993-04-01), Yokota
patent: 5352881 (1994-10-01), Matsueda
patent: 5459309 (1995-10-01), Kagami et al.
Patent Abstracts of Japan, vol. 10, No. 93 (P-445), 10 Apr. 1986 & JP-A-60 226 029 (Sony KK), 11 Nov. 1985.
Patent Astracts of Japan, vol. 6, No. 175 (P-141) (1053), 9 Sep. 1982 & JP-A-57 092 439 (Matsushita Denki Sangyo KK), 9 Jun. 1982.
Patent Abstracts of Japan, vol. 14, No. 269 (P-1059), 11 Jun. 1990 & JP-A-02 076 128 (Pioneer Electron Corp), 15 Mar. 1990.
Patent Abstracts of Japan, vol. 16, No. 424 (P-1415), 7 Sep. 1992 & JP-A-04 143 930 (Alpine Electronics Inc.), 18 May 1992 & US-A 5,202,871 (Yokota), 13 Apr. 1993.

Affiliated with

Also associated with

Rating

Focusing servo system and focus servo acquisition enable with mu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Focusing servo system and focus servo acquisition enable with mu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Focusing servo system and focus servo acquisition enable with mu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1539726