Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1989-11-14
1993-01-19
McElheny, Jr., Donald
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 4433, G11B 700
Patent
active
051811944
ABSTRACT:
A writing device for an optical memory card is disclosed. In this writing device, tracking correction is performed by moving a mobile objective lens of an optical system in the transverse direction of a track in accordance with a tracking error of the optical system relative to the optical memory card, and the range in which tracking correcting can be performed is enlarged by moving a retaining portion of the objective lens by a moving device when first comparison device has determined that tracking error information was outside a predetermined first standard range. The writing device includes a writing stoppage device for stopping writing data on the optical memory card when a second comparison device has determined that the tracking error information exceeded a second standard range which is wider than the first standard range. Since the retaining portion of the objective lens is moved in the direction in which any deviation occurring during tracking can be corrected, the range in which tracking correction can be performed can be enlarged. Further, since it is determined that erroneous tracking is occurring and writing of data is stopped when the deviation occurring during tracking for writing data has exceeded the second standard range which is larger than the first standard range, damage to the written data can be prevented.
REFERENCES:
patent: 4128847 (1978-12-01), Roullet et al.
patent: 4554652 (1985-11-01), Maeda et al.
patent: 4730290 (1988-03-01), Takasago et al.
patent: 4807210 (1989-02-01), Kaku et al.
patent: 4912697 (1990-03-01), Enari et al.
patent: 4956832 (1990-09-01), Miyasaka
patent: 4982297 (1991-01-01), Tsujisawa
patent: 4982392 (1991-01-01), Soejima
Kabushiki Kaisha CSK
McElheny Jr. Donald
LandOfFree
Writing device for optical memory card does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Writing device for optical memory card, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Writing device for optical memory card will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-105950