CA833100A - Optical transducer head and system - Google Patents

Optical transducer head and system

Info

Publication number
CA833100A
CA833100A CA833100A CA833100DA CA833100A CA 833100 A CA833100 A CA 833100A CA 833100 A CA833100 A CA 833100A CA 833100D A CA833100D A CA 833100DA CA 833100 A CA833100 A CA 833100A
Authority
CA
Canada
Prior art keywords
transducer head
optical transducer
optical
head
transducer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA833100A
Inventor
O. Johnson Keith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gauss Electrophysics Inc
Original Assignee
Gauss Electrophysics Inc
Publication date
Application granted granted Critical
Publication of CA833100A publication Critical patent/CA833100A/en
Expired legal-status Critical Current

Links

CA833100A Optical transducer head and system Expired CA833100A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA833100T

Publications (1)

Publication Number Publication Date
CA833100A true CA833100A (en) 1970-01-27

Family

ID=36310559

Family Applications (1)

Application Number Title Priority Date Filing Date
CA833100A Expired CA833100A (en) Optical transducer head and system

Country Status (1)

Country Link
CA (1) CA833100A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4856108A (en) * 1972-08-25 1989-08-08 Thomson-Csf Optical arrangement and a reading apparatus including detection of data elements diffractive along entire extent
US5659535A (en) * 1994-05-06 1997-08-19 Discovision Associates Method for retrieving data from a storage device
US5677899A (en) 1991-02-15 1997-10-14 Discovision Associates Method for moving carriage assembly from initial position to target position relative to storage medium
US5682367A (en) * 1991-05-10 1997-10-28 Discovision Associates Optical data storage and retrieval system and method
US5729511A (en) 1991-02-15 1998-03-17 Discovision Associates Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal
US5748578A (en) 1995-01-25 1998-05-05 Discovision Associates Colpitts type oscillator having reduced ringing and improved optical disc system utilizing same
US5790495A (en) * 1994-05-06 1998-08-04 Discovision Associates Data generator assembly for retrieving stored data by comparing threshold signal with preprocessed signal having DC component
US5808980A (en) 1991-02-15 1998-09-15 Discovision Associates Seek actuator for optical recording
US5920539A (en) 1995-01-25 1999-07-06 Discovision Associates Apparatus and method for suppression of electromagnetic emissions having a groove on an external surface for passing an electrical conductor
US6069857A (en) 1991-02-15 2000-05-30 Discovision Associates Optical disc system having improved circuitry for performing blank sector check on readable disc
US6091684A (en) 1995-01-25 2000-07-18 Discovision Associates Optical disc system and method for changing the rotational rate of an information storage medium
US6141300A (en) 1989-06-20 2000-10-31 Discovision Associates Optical actuator including lens assembly with optical axis having symmetric suspensory forces acting thereon and optical disc system including same
US6236625B1 (en) 1991-02-15 2001-05-22 Discovision Associates Optical disc system having current monitoring circuit with controller for laser driver and method for operating same
US6434087B1 (en) 1995-01-25 2002-08-13 Discovision Associates Optical disc system and method for controlling bias coil and light source to process information on a storage medium
US6532199B1 (en) 1991-02-15 2003-03-11 Discovision Associates Optical actuator assembly with lens position sensor for recording or playback

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4868808A (en) * 1972-08-25 1989-09-19 Thomson-Csf Optical disk arrangement with closed contours whose entire extent represents information
US5307332A (en) * 1972-08-25 1994-04-26 Thomson-Csf Optical disk arrangement with diffractive tracks and a photoelectric assembly providing positional control information
US4856108A (en) * 1972-08-25 1989-08-08 Thomson-Csf Optical arrangement and a reading apparatus including detection of data elements diffractive along entire extent
US6141300A (en) 1989-06-20 2000-10-31 Discovision Associates Optical actuator including lens assembly with optical axis having symmetric suspensory forces acting thereon and optical disc system including same
US6069857A (en) 1991-02-15 2000-05-30 Discovision Associates Optical disc system having improved circuitry for performing blank sector check on readable disc
US5677899A (en) 1991-02-15 1997-10-14 Discovision Associates Method for moving carriage assembly from initial position to target position relative to storage medium
US6236625B1 (en) 1991-02-15 2001-05-22 Discovision Associates Optical disc system having current monitoring circuit with controller for laser driver and method for operating same
US5729511A (en) 1991-02-15 1998-03-17 Discovision Associates Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal
US6532199B1 (en) 1991-02-15 2003-03-11 Discovision Associates Optical actuator assembly with lens position sensor for recording or playback
US5808980A (en) 1991-02-15 1998-09-15 Discovision Associates Seek actuator for optical recording
US5774440A (en) * 1991-05-10 1998-06-30 Discovision Associates Optical data storage and retrieval system and method
US5761170A (en) * 1991-05-10 1998-06-02 Discovision Associates Optical data storage and retrieval system and method
US6570839B2 (en) 1991-05-10 2003-05-27 Discovision Associates Optical data system and optical disk relating thereto
US5859825A (en) * 1991-05-10 1999-01-12 Discovision Associates Optical data storage and retrieval system and method
US5682367A (en) * 1991-05-10 1997-10-28 Discovision Associates Optical data storage and retrieval system and method
US6411580B1 (en) 1993-01-25 2002-06-25 Noboru Kimura Storing data on a medium in an optical system
US6343061B1 (en) 1993-01-25 2002-01-29 Discovision Associates Optical data system and high density optical disk relating thereto
US5790495A (en) * 1994-05-06 1998-08-04 Discovision Associates Data generator assembly for retrieving stored data by comparing threshold signal with preprocessed signal having DC component
US6542451B1 (en) 1994-05-06 2003-04-01 Discovision Associates Retrieving data from a storage device using programmable filter and equalizer
US5894468A (en) * 1994-05-06 1999-04-13 Discovision Associates Data recovery with differentiation and partial integration stages to eliminate noises and DC offset level
US5706267A (en) * 1994-05-06 1998-01-06 Discovision Associates Method and apparatus for retrieving data from a storage device
US5659535A (en) * 1994-05-06 1997-08-19 Discovision Associates Method for retrieving data from a storage device
US5974007A (en) 1995-01-25 1999-10-26 Discovision Associates Apparatus for moving a carriage assembly from an initial position to a target position
US6058081A (en) 1995-01-25 2000-05-02 Discovision Associates Optical drive system having servomotor operated relative to maximum quad sum signal
US6087644A (en) 1995-01-25 2000-07-11 Discovision Associates Focus capture for optical disc system including detection of quad sum signal to close focus
US6091684A (en) 1995-01-25 2000-07-18 Discovision Associates Optical disc system and method for changing the rotational rate of an information storage medium
US6034364A (en) 1995-01-25 2000-03-07 Discovision Associates Optical disc system including focus capture assembly with focus error signal circuit and method for operating same
US5920539A (en) 1995-01-25 1999-07-06 Discovision Associates Apparatus and method for suppression of electromagnetic emissions having a groove on an external surface for passing an electrical conductor
US6243336B1 (en) 1995-01-25 2001-06-05 Discovision Associates Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal and focus capture method for use in same
US6266306B1 (en) 1995-01-25 2001-07-24 Discovision Associates Analog to digital converter and assembly for use in optical drive system to normalize servo error signals and multiplex reference voltage inputs and digital outputs
US6278665B1 (en) 1995-01-25 2001-08-21 Discovision Associates Optical disc system including current monitoring circuit assembly having controller with improved optics module and laser driver and method for operating same
US6317391B1 (en) 1995-01-25 2001-11-13 Discovision Associates Optical disc system having current monitoring circuit with improved bias coil assembly and controller for laser driver and method for operating same
US5878015A (en) 1995-01-25 1999-03-02 Discovision Associates Laser driver for controlling electrical current passed to a laser in an optical disc system
US5875158A (en) 1995-01-25 1999-02-23 Discovision Associates Servo control system for information storage device
US6418097B1 (en) 1995-01-25 2002-07-09 Discovision Associates Analog to digital converter assembly for normalizing servo error signals and multiplexing reference voltage inputs and digital outputs and improved optical drive system including same
US6434087B1 (en) 1995-01-25 2002-08-13 Discovision Associates Optical disc system and method for controlling bias coil and light source to process information on a storage medium
US5828054A (en) 1995-01-25 1998-10-27 Discovision Associates Focusing method and system for focus capture and focus control in optical disc system including detection of Quad Sum signal to close focus
US5796703A (en) 1995-01-25 1998-08-18 Discovision Associates Apparatus for controlling an electrical current passed to a writing device in an optical storage system
US5748578A (en) 1995-01-25 1998-05-05 Discovision Associates Colpitts type oscillator having reduced ringing and improved optical disc system utilizing same
US6741529B1 (en) 1995-01-25 2004-05-25 Discovision Associates Method and apparatus for moving carriage assembly from initial position to target position and optical disc system including same

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