DK614286A - AUTOMATIC CORRECTION SYSTEM FOR THE SERVICE CIRCUIT IN A DEVICE WITH OPTICAL DETECTION OF A ROTATING INFORMATION CARRIER - Google Patents

AUTOMATIC CORRECTION SYSTEM FOR THE SERVICE CIRCUIT IN A DEVICE WITH OPTICAL DETECTION OF A ROTATING INFORMATION CARRIER

Info

Publication number
DK614286A
DK614286A DK614286A DK614286A DK614286A DK 614286 A DK614286 A DK 614286A DK 614286 A DK614286 A DK 614286A DK 614286 A DK614286 A DK 614286A DK 614286 A DK614286 A DK 614286A
Authority
DK
Denmark
Prior art keywords
scanning
servo
anomalies
circuit
correction system
Prior art date
Application number
DK614286A
Other languages
Danish (da)
Other versions
DK166054B (en
DK614286D0 (en
DK166054C (en
Inventor
Dieter Baas
Werner Nutz
Original Assignee
Thomson Brandt Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thomson Brandt Gmbh filed Critical Thomson Brandt Gmbh
Publication of DK614286A publication Critical patent/DK614286A/en
Publication of DK614286D0 publication Critical patent/DK614286D0/en
Publication of DK166054B publication Critical patent/DK166054B/en
Application granted granted Critical
Publication of DK166054C publication Critical patent/DK166054C/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0948—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for detection and avoidance or compensation of imperfections on the carrier, e.g. dust, scratches, dropouts
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following
    • G11B21/106—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following on disks
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0946—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for operation during external perturbations not related to the carrier or servo beam, e.g. vibration

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

An automatic correction system for the servo-circuit in a device with optical scanning of a rotating information support with a known servo-circuit 3 which indicates anomalies in the scanning system 1, to the outputs of which a gate circuit is connected, and which provides as necessary a mute control signal to the decoder 2 connected to the scanning system 1 and thus mute-controls its outputs. According to the invention, anomalies in scanning can to a great extent be weakened in terms of their appearance by virtue of the fact that servo- specific indicator signals serve as a triggering criterion in the event of anomalies. This is achieved by virtue of the fact that, from the current address data, an identification signal is formed in the comparison and correction system 6 by data monitoring 4 and by continuous storage 7, so that, after the signalling of the termination of an anomaly, a comparison is made between the old and new sub-code in order to form therefrom an appropriate correction signal which is supplied to the servo system 3 and which returns the scanning system 1 to the old scanning point. <IMAGE>
DK614286A 1985-04-18 1986-12-18 AUTOMATIC CORRECTION SYSTEM FOR SERVICE CIRCUIT IN A DEVICE WITH OPTICAL DETECTION OF A ROTATING INFORMATION CARRIER DK166054C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3514034 1985-04-18
DE19853514034 DE3514034A1 (en) 1985-04-18 1985-04-18 AUTOMATIC CORRECTION SYSTEM FOR THE SERVO CIRCUIT OF A DEVICE WITH OPTICAL SCANNING OF A ROTATING INFORMATION CARRIER
EP8600224 1986-04-17
PCT/EP1986/000224 WO1986006201A1 (en) 1985-04-18 1986-04-17 Automatic correction system for the servo-circuit of a device with optical scanning of a rotating information support

Publications (4)

Publication Number Publication Date
DK614286A true DK614286A (en) 1986-12-18
DK614286D0 DK614286D0 (en) 1986-12-18
DK166054B DK166054B (en) 1993-03-01
DK166054C DK166054C (en) 1993-07-12

Family

ID=6268492

Family Applications (1)

Application Number Title Priority Date Filing Date
DK614286A DK166054C (en) 1985-04-18 1986-12-18 AUTOMATIC CORRECTION SYSTEM FOR SERVICE CIRCUIT IN A DEVICE WITH OPTICAL DETECTION OF A ROTATING INFORMATION CARRIER

Country Status (8)

Country Link
EP (1) EP0220251B1 (en)
JP (1) JPH0792989B2 (en)
KR (1) KR940002962B1 (en)
DE (2) DE3514034A1 (en)
DK (1) DK166054C (en)
HK (1) HK148494A (en)
SG (1) SG8892G (en)
WO (1) WO1986006201A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02230515A (en) * 1989-03-03 1990-09-12 Sony Corp Optical recording and reproducing device

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55113172A (en) * 1979-02-19 1980-09-01 Matsushita Electric Ind Co Ltd Detection system for abnormal reproduction state
US4313134A (en) * 1979-10-12 1982-01-26 Rca Corporation Track error correction system as for video disc player
US4307418A (en) * 1979-10-12 1981-12-22 Rca Corporation Video disc player system for correlating stylus position with information previously detected from disc
JPS57104386A (en) * 1980-12-19 1982-06-29 Trio Kenwood Corp Video disc playback device
US4488278A (en) * 1982-08-17 1984-12-11 Rca Corporation Coding system for digital audio disc record
JPS5936385A (en) * 1982-08-20 1984-02-28 Matsushita Electric Ind Co Ltd Reading circuit of track address
JPS59117762A (en) * 1982-12-24 1984-07-07 Nippon Columbia Co Ltd Disc reproducing device
JPS59167879A (en) * 1983-03-15 1984-09-21 Toshiba Corp Detector of track jump in disc record reproducing system
JPS59201274A (en) * 1983-04-27 1984-11-14 Sony Corp Disk reproducing device
JPS607658A (en) * 1983-06-24 1985-01-16 Victor Co Of Japan Ltd Method for correcting address of disc-like information recording medium
JPS6043270A (en) * 1983-08-19 1985-03-07 Sony Corp Disk player
NL8303565A (en) * 1983-10-17 1985-05-17 Philips Nv Apparatus for displaying information from a plate-shaped optically readable record carrier.

Also Published As

Publication number Publication date
DE3674534D1 (en) 1990-10-31
SG8892G (en) 1992-03-20
DE3514034A1 (en) 1986-10-23
WO1986006201A1 (en) 1986-10-23
DK166054B (en) 1993-03-01
KR940002962B1 (en) 1994-04-09
JPS62502002A (en) 1987-08-06
EP0220251A1 (en) 1987-05-06
DK614286D0 (en) 1986-12-18
HK148494A (en) 1995-01-06
EP0220251B1 (en) 1990-09-26
KR880700407A (en) 1988-03-15
JPH0792989B2 (en) 1995-10-09
DK166054C (en) 1993-07-12

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Legal Events

Date Code Title Description
PBP Patent lapsed