Reduction of Seek Time of Tracking Actuator with Pulsed Excitation in Optical Disk

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 583
  • Download : 479
Time consumption during the track seek is an important factor which indicates the ability of an optical disk system. In a two-stage tracking actuator, latency time exists before the laser beam follows the destination track because of the vibration of the fine actuator. Modified velocity profiles and control techniques for the actuator have been proposed to reduce the latency time. When a fine actuator is locked to the coarse actuator, another latency time caused by the disk eccentricity cannot be reduced. It becomes possible to forecast the eccentricity as the rotation type of the optical disk changes to constant angular velocity (CAV). Thus the latency time can be reduced by exitation of the fine actuator with the same velocity of the track when the coarse actuator stops. Pulsed exitation is used for the exitation. This method is applied to a compact disk read-only memoty (CD-ROM).
Publisher
The Japan Society of Applied Physics
Issue Date
2000
Keywords

optical disk; tracking actuator; seek time; latency time; latency time; pulsed excitation

Citation

Jpn. J. Appl. Phys. 39 (2000) pp. 6546-6549

ISSN
0021-4922
DOI
10.1143/JJAP.39.6546
URI
http://hdl.handle.net/10203/5343
Link
http://jjap.ipap.jp/link?JJAP/39/6546/
Appears in Collection
ME-Journal Papers(저널논문)
Files in This Item
Reduction of seek time of tracking actuator with pulsed excitation in optical disk.pdf(245.14 kB)Download

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0