GB1475853A - Electro-optical retrieval systems - Google Patents

Electro-optical retrieval systems

Info

Publication number
GB1475853A
GB1475853A GB1093775A GB1093775A GB1475853A GB 1475853 A GB1475853 A GB 1475853A GB 1093775 A GB1093775 A GB 1093775A GB 1093775 A GB1093775 A GB 1093775A GB 1475853 A GB1475853 A GB 1475853A
Authority
GB
United Kingdom
Prior art keywords
electro
tracking
recording medium
focusing system
retrieval systems
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
GB1093775A
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.)
VIDEONICS OF HAWAII
Original Assignee
VIDEONICS OF HAWAII
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
Priority claimed from US05/472,080 external-priority patent/US3946367A/en
Application filed by VIDEONICS OF HAWAII filed Critical VIDEONICS OF HAWAII
Publication of GB1475853A publication Critical patent/GB1475853A/en
Expired legal-status Critical Current

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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/003—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with webs, filaments or wires, e.g. belts, spooled tapes or films of quasi-infinite extent
    • 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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/0025—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with cylinders or cylinder-like carriers or cylindrical sections or flat carriers loaded onto a cylindrical surface, e.g. truncated cones
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
    • G11C13/04—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam
    • G11C13/048—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam using other optical storage elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/7605—Television signal recording on discs or drums

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

1475853 Automatic control of position VIDEONICS OF HAWAII Inc 17 March 1975 [22 May 1974] 10937/75 Addition to 1456032 Heading G3R [Also in Division G5] In an apparatus for playing back a multi-layered optical recording medium 64, containing record tracks at different depths therein, by means of an electro-optical playback detector 66, 67 which is focused on a selected track under the control of a tracking and focusing system, generally as disclosed in Specification 1456032 but with a light source 63 arranged to flood with light the general area of interest of at least two adjacent layers of the recording medium, the playback detector and the tracking and focusing system share a common lens 66.
GB1093775A 1974-05-22 1975-03-17 Electro-optical retrieval systems Expired GB1475853A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/472,080 US3946367A (en) 1972-12-20 1974-05-22 Three dimensional electro-optical retrieval system

Publications (1)

Publication Number Publication Date
GB1475853A true GB1475853A (en) 1977-06-10

Family

ID=23874126

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1093775A Expired GB1475853A (en) 1974-05-22 1975-03-17 Electro-optical retrieval systems

Country Status (2)

Country Link
CA (1) CA1035044A (en)
GB (1) GB1475853A (en)

Also Published As

Publication number Publication date
CA1035044A (en) 1978-07-18

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee