G - Physics – 11 – B
Patent
G - Physics
11
B
352/32.21
G11B 7/09 (2006.01)
Patent
CA 1321022
SYSTEM FOR OBTAINING OPTIMUM FOCUSING POSITION IN OPTICAL DISC SYSTEM ABSTRACT OF THE DISCLOSURE A system for obtaining an optimum focusing position in an optical disc system, wherein an optical beam is impinged onto a track of an optical disc, and a reflection signal having information of an intensity of a optical beam reflected by an optical disc, is obtained. A predetermined frequency component, which component is generated by a modulation caused by an ex- istence of a pit on a track of the optical disc in a reflecting signal, is extracted from the reflection signal, and then a focus position wherein a maximum intensity of the above extracted component is obtained, is searched by changing the focus position of the optical beam. Further, the above system is incorporated in a focus servo control system for maintaining an optimum focusing position in an optical disc system during reading and writing operations, to determine an optimum offset value which is to be adjusted to compensate an error arisen from a construction of the focus servo control system, during an offset adjusting operation.
603908
Arai Shigeru
Iwamoto Toshitaka
Minami Akira
Saitoh Hidenori
Sasaki Masateru
Fujitsu Limited
Mcfadden Fincham
LandOfFree
System for obtaining optimum focusing position in optical... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for obtaining optimum focusing position in optical..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for obtaining optimum focusing position in optical... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1284064