Process and system for optical recording and reading on a mobile

Details Process and system for optical recording and reading on a mobile Process and system for optical recording and reading on a mobile

1985-08-30

1987-05-26

McElheny, Jr., Donald

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

G11B 7007

Patent

active

046690778

ABSTRACT:
A process and device for focussing a light energy beam on a data carrier comprising sites fromed of virgin areas free from any data recording provided along tracks and serving as reference plane for said focussing. In a preferred variation, these areas are preceded by flags associated with a specific code. Control is achieved by measuring the deviation between the plane of focussing of a beam into a spot scanning the tracks and the reference plane formed by the surface of the virgin areas. Between two passages of these areas of the measurements are stored. The focussing error signal is obtained by filtering these measurements.

REFERENCES:
patent: 4094013 (1978-06-01), Hill et al.
patent: 4325135 (1982-04-01), Dil et al.
patent: 4428075 (1984-01-01), Hazel et al.
patent: 4443870 (1984-04-01), Hazel et al.
patent: 4553228 (1985-11-01), Gerard et al.
patent: 4562564 (1985-12-01), Bricot et al.

Affiliated with

Also associated with

Rating

Process and system for optical recording and reading on a mobile does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process and system for optical recording and reading on a mobile, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and system for optical recording and reading on a mobile will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-708314