G - Physics – 11 – B
Patent
G - Physics
11
B
352/32.2
G11B 21/10 (2006.01) G11B 7/085 (2006.01)
Patent
CA 1213979
ABSTRACT OF THE DISCLOSURE A linear detector (61) for use in a coarse positioning servo system of an optical system. The linear detector produces an error signal having an amplitude linearly proportional to the distance that a relatively narrow strip of light energy (63) falls on a collection surface (62) of the detector as measured relative to a fixed reference point on said collection surface. Two reference signals (65, 66) are derived from circuitry associated with the collection surface. A first reference signal (65) has an amplitude proportional to the intensity of the focused light energy and the location that said light energy falls on the collection surface relative to a first reference point. A second reference signal (66) has an amplitude proportional to the intensity of the focussed light energy and the location that said light energy falls on the collection surface relative to a second reference point. The sum and difference of the amplitudes of the first and second reference singles are derived to produce sum and difference signals, respectively. The difference signal is divided by the sum signal to produce the desired error signal (67), which error signal has an amplitude that is substantially independent of the intensity of the focused light energy.
455104
Smart & Biggar
Storage Technology Partners II (through Stc Optical Disk Develop Managing General Partner)
LandOfFree
Coarse position error signal generation in an optical disk... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coarse position error signal generation in an optical disk..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coarse position error signal generation in an optical disk... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1296456