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GB1369763A - Photoelectric reproducing head for an optical sound reproducer - Google Patents

Photoelectric reproducing head for an optical sound reproducer

Info

Publication number
GB1369763A
GB1369763A GB3136873A GB3136873A GB1369763A GB 1369763 A GB1369763 A GB 1369763A GB 3136873 A GB3136873 A GB 3136873A GB 3136873 A GB3136873 A GB 3136873A GB 1369763 A GB1369763 A GB 1369763A
Authority
GB
United Kingdom
Prior art keywords
photo
optical sound
housing
photoelectric
light
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
GB3136873A
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.)
Gakken Holdings Co Ltd
Original Assignee
Gakken Co Ltd
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 Gakken Co Ltd filed Critical Gakken Co Ltd
Priority to GB3136873A priority Critical patent/GB1369763A/en
Publication of GB1369763A publication Critical patent/GB1369763A/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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/0857—Arrangements for mechanically moving the whole head
    • G11B7/08582—Sled-type positioners

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

1369763 Photo-electrically reading a sound record GAKKEN CO Ltd 19 July 1972 31368/73 Divided out of 1369761 Heading G1A Light from a lamp 58, Fig. 7, near one end of a cylindrical housing 52 passes through a converging lens system 59, 62 within the housing and through a slit 57 in the other end of the housing and is reflected from an optical sound track on to the light-sensitive surface of a plate-like photo-electric element 53 which is not directly exposed to light transmitted by the lens system from the lamp 58. The slit 57 may be between two photo-electric elements, in a single element, or between a single element and a screen. In a playback apparatus, Fig. 3, such a head 50 moves along a slot 74 in a rotating turn-table 33 so as to scan a spiral optical sound track on the underside of a stationary sheet record 20, as described in Specification 1369762.
GB3136873A 1972-07-19 1972-07-19 Photoelectric reproducing head for an optical sound reproducer Expired GB1369763A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3136873A GB1369763A (en) 1972-07-19 1972-07-19 Photoelectric reproducing head for an optical sound reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3136873A GB1369763A (en) 1972-07-19 1972-07-19 Photoelectric reproducing head for an optical sound reproducer

Publications (1)

Publication Number Publication Date
GB1369763A true GB1369763A (en) 1974-10-09

Family

ID=10322063

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3136873A Expired GB1369763A (en) 1972-07-19 1972-07-19 Photoelectric reproducing head for an optical sound reproducer

Country Status (1)

Country Link
GB (1) GB1369763A (en)

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Legal Events

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