Method and apparatus for detecting the focusing state and positi

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

369 45, 369112, 250201, G11B 700

Patent

active

048170747

ABSTRACT:
In method and apparatus of detecting tracking and focusing errors in an optical recording system, such means for dividing light beam reflected from an optical recording medium into four light beams as a quadrant prism is utilized. The light beam dividing means is provided with four sections from which the four light beams radiate with four different directions on a plane including a common straight line so that two inner light beams are utilized to detect the focusing error while two outer light beams are utilized to detect the tracking error.

REFERENCES:
patent: 4560259 (1985-12-01), Humphrey
patent: 4631395 (1986-12-01), Ando
patent: 4719614 (1988-01-01), Leterme et al.
patent: 4730899 (1988-03-01), Kime et al.
Masayuki Inoue et al., Optical Head for an Optical Disk, 46th Scientific lecture meeting for Applied Physics Society, Autumn 1985.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for detecting the focusing state and positi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for detecting the focusing state and positi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting the focusing state and positi will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1665526

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.