Optical head apparatus

Details Optical head apparatus Optical head apparatus

2006-02-07

2006-02-07

Korzuch, William (Department: 2653)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S300000, C369S013130, C369S013320, C369S053210

Reexamination Certificate

active

06996043

ABSTRACT:
Preceding to the reading out of the recording information of the optical disk by the pick-up, the height of the foreign material existing at the light converging position on the information reading surface is detected by the detector, and when the height of the foreign material is higher than the floating height h of the SIL, the magnetic field is generated by applying the control current corresponding to the height of the foreign material to the coil as the magnetic field generator at the timing before the foreign material is moved to the information reading position of the pick-up by the rotation of the optical disk. Then, when the magnetic field is provided to the magnetic substance fixedly holding the SIL which is floating, the movement operation to separate the SIL to the higher position than the height of the foreign material from the information reading surface together with the magnetic substance, is conducted.

REFERENCES:
patent: 3767306 (1973-10-01), Mast et al.
patent: 4402607 (1983-09-01), McVay et al.
patent: 5436464 (1995-07-01), Hayano et al.
patent: 6130418 (2000-10-01), Van Rosmalen et al.
patent: 6166808 (2000-12-01), Greve
patent: 6178157 (2001-01-01), Berg et al.
patent: 6194129 (2001-02-01), Kasono et al.
patent: 0 549 236 (1993-06-01), None
patent: WO 97/39441 (1997-10-01), None

Affiliated with

Also associated with

Rating

Optical head apparatus 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 head apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical head apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3671419