NL7314464A - DEVICE FOR OPTICAL SCANNING OF AN INFORMATION TRACK ON A ROTATING INFORMATION CARRIER. - Google Patents

DEVICE FOR OPTICAL SCANNING OF AN INFORMATION TRACK ON A ROTATING INFORMATION CARRIER.

Info

Publication number
NL7314464A
NL7314464A NL7314464A NL7314464A NL7314464A NL 7314464 A NL7314464 A NL 7314464A NL 7314464 A NL7314464 A NL 7314464A NL 7314464 A NL7314464 A NL 7314464A NL 7314464 A NL7314464 A NL 7314464A
Authority
NL
Netherlands
Prior art keywords
optical scanning
information
rotating
track
information carrier
Prior art date
Application number
NL7314464A
Other languages
Dutch (nl)
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Priority to NL7314464A priority Critical patent/NL7314464A/en
Priority to DE19742448792 priority patent/DE2448792A1/en
Priority to CA211,612A priority patent/CA1040741A/en
Priority to JP49118787A priority patent/JPS5068731A/ja
Priority to GB4509174A priority patent/GB1475179A/en
Priority to DK545474A priority patent/DK545474A/da
Priority to IT70103/74A priority patent/IT1024629B/en
Priority to CH1394474A priority patent/CH574151A5/xx
Priority to BR8645/74A priority patent/BR7408645D0/en
Priority to AU74428/74A priority patent/AU485474B2/en
Priority to SE7413069A priority patent/SE7413069L/xx
Priority to AT835874A priority patent/AT339390B/en
Priority to NO743762A priority patent/NO743762L/no
Priority to ES431129A priority patent/ES431129A1/en
Priority to BE149705A priority patent/BE821269A/en
Priority to FR7435270A priority patent/FR2248569B1/fr
Publication of NL7314464A publication Critical patent/NL7314464A/en

Links

Classifications

    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • 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
    • G11B7/0901—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 for track following only
    • G11B7/0903—Multi-beam tracking systems

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)
NL7314464A 1973-10-20 1973-10-20 DEVICE FOR OPTICAL SCANNING OF AN INFORMATION TRACK ON A ROTATING INFORMATION CARRIER. NL7314464A (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
NL7314464A NL7314464A (en) 1973-10-20 1973-10-20 DEVICE FOR OPTICAL SCANNING OF AN INFORMATION TRACK ON A ROTATING INFORMATION CARRIER.
DE19742448792 DE2448792A1 (en) 1973-10-20 1974-10-12 DEVICE FOR OPTICAL SCANNING OF AN INFORMATION TRACK ON A ROTATING INFORMATION CARRIER
CA211,612A CA1040741A (en) 1973-10-20 1974-10-17 Device for optically scanning an information track on a rotating information carrier
JP49118787A JPS5068731A (en) 1973-10-20 1974-10-17
GB4509174A GB1475179A (en) 1973-10-20 1974-10-17 Optical scanning
DK545474A DK545474A (en) 1973-10-20 1974-10-17
IT70103/74A IT1024629B (en) 1973-10-20 1974-10-17 DEVICE FOR THE OPTICAL SCANNING OF AN INFORMATION TRACK ON A ROTATING SUPPORT
CH1394474A CH574151A5 (en) 1973-10-20 1974-10-17
BR8645/74A BR7408645D0 (en) 1973-10-20 1974-10-17 DEVICE TO OPTICALLY EXPLORE AN INFORMATION TRAIL
AU74428/74A AU485474B2 (en) 1973-10-20 1974-10-17 Device for optically scanning an information track ona rotating information carrier
SE7413069A SE7413069L (en) 1973-10-20 1974-10-17
AT835874A AT339390B (en) 1973-10-20 1974-10-17 DEVICE FOR OPTICAL SCANNING OF AN INFORMATION TRACK ON A ROTATING INFORMATION CARRIER
NO743762A NO743762L (en) 1973-10-20 1974-10-17
ES431129A ES431129A1 (en) 1973-10-20 1974-10-18 Optical scanning
BE149705A BE821269A (en) 1973-10-20 1974-10-18 DEVICE FOR OPTICAL EXPLORATION OF AN INFORMATION TRACK ON A ROTATING RECORD HOLDER
FR7435270A FR2248569B1 (en) 1973-10-20 1974-10-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7314464A NL7314464A (en) 1973-10-20 1973-10-20 DEVICE FOR OPTICAL SCANNING OF AN INFORMATION TRACK ON A ROTATING INFORMATION CARRIER.

Publications (1)

Publication Number Publication Date
NL7314464A true NL7314464A (en) 1975-04-22

Family

ID=19819855

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7314464A NL7314464A (en) 1973-10-20 1973-10-20 DEVICE FOR OPTICAL SCANNING OF AN INFORMATION TRACK ON A ROTATING INFORMATION CARRIER.

Country Status (15)

Country Link
JP (1) JPS5068731A (en)
AT (1) AT339390B (en)
BE (1) BE821269A (en)
BR (1) BR7408645D0 (en)
CA (1) CA1040741A (en)
CH (1) CH574151A5 (en)
DE (1) DE2448792A1 (en)
DK (1) DK545474A (en)
ES (1) ES431129A1 (en)
FR (1) FR2248569B1 (en)
GB (1) GB1475179A (en)
IT (1) IT1024629B (en)
NL (1) NL7314464A (en)
NO (1) NO743762L (en)
SE (1) SE7413069L (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5270990A (en) * 1986-08-15 1993-12-14 Canon Kabushiki Kaisha Tracking error signal detecting apparatus using an electron beam and apparatus for effecting recording/reproduction of information by the utilization of a plurality of electron beams

Also Published As

Publication number Publication date
NO743762L (en) 1975-05-20
ATA835874A (en) 1977-02-15
AT339390B (en) 1977-10-10
IT1024629B (en) 1978-07-20
CH574151A5 (en) 1976-03-31
FR2248569B1 (en) 1979-08-24
ES431129A1 (en) 1976-11-01
BE821269A (en) 1975-04-18
AU7442874A (en) 1976-04-29
GB1475179A (en) 1977-06-01
DE2448792A1 (en) 1975-05-28
CA1040741A (en) 1978-10-17
JPS5068731A (en) 1975-06-09
DK545474A (en) 1975-06-30
BR7408645D0 (en) 1975-08-05
SE7413069L (en) 1975-04-21
FR2248569A1 (en) 1975-05-16

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Legal Events

Date Code Title Description
BC A request for examination has been filed
BV The patent application has lapsed