Optical memory system having track following

Patent · Tue Feb 14 00:00:00 EST 1984

OSTI ID:6928030

Hsieh, D; LaBudde, E V

A high density optical storage system is disclosed which employs a laser beam for reading data in a track on a rotating optical disk containing a large number of concentric tracks. Track following is provided using a galvanometer-controlled mirror in the path of the beam which is angularly deflected during track following in response to detected track deviations, whereby the beam is controlled to accurately follow the track. Provision is also made for detecting the angular position of the mirror. A linear motor responsive to the detected angular position moves the mirror in a direction which reduces the deflection required to be provided by the mirror in order to maintain the beam accurately following the track. The mirror is also controlled in response to the rate of change of the linear motor velocity for providing greater system stability.

• Assignee: Burroughs Corporation
• Patent Number(s): US 4432083
• OSTI ID: 6928030
• Resource Relation: Patent File Date: Filed date 17 Feb 1982; Other Information: PAT-APPL-349536
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
OPTICAL SCANNERS
ACCURACY
POSITIONING
SERVOMECHANISMS
STABILITY
DESIGN
DETECTION
ELECTRIC MOTORS
FEEDBACK
FOCUSING
GALVANOMETERS
INFORMATION RETRIEVAL
LASERS
MEMORY DEVICES
MIRRORS
RECORDING SYSTEMS
ROTATION
CONTROL EQUIPMENT
ELECTRIC MEASURING INSTRUMENTS
ELECTRICAL EQUIPMENT
ELECTRONIC EQUIPMENT
EQUIPMENT
MEASURING INSTRUMENTS
MOTION
MOTORS
OPTICAL EQUIPMENT
020300* - Petroleum- Drilling & Production