GB1171716A - Optical recording of superimposed sound tracks. - Google Patents

Optical recording of superimposed sound tracks.

Info

Publication number
GB1171716A
GB1171716A GB3268567A GB3268567A GB1171716A GB 1171716 A GB1171716 A GB 1171716A GB 3268567 A GB3268567 A GB 3268567A GB 3268567 A GB3268567 A GB 3268567A GB 1171716 A GB1171716 A GB 1171716A
Authority
GB
United Kingdom
Prior art keywords
light
film
recording
signals
transducers
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
GB3268567A
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.)
Bell and Howell Co
Original Assignee
Bell and Howell Co
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 Bell and Howell Co filed Critical Bell and Howell Co
Publication of GB1171716A publication Critical patent/GB1171716A/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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/14—Heads, e.g. forming of the optical beam spot or modulation of the optical beam specially adapted to record on, or to reproduce from, more than one track simultaneously

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

1,171,716. Optical recording. BELL & HOWELL CO. 17 July, 1967 [18 July, 1966], No. 32685/67. Heading G5R. In a variable-density optical recording device for recording two or more signals on a single track on a moving light-sensitive medium, each signal modulates the intensity of a light beam which is directed to strike said medium over an elongate area, each area having its longer dimension at an angle to the longer dimension of each other area and to the direction of motion of the medium. Sound signals picked up by microphones 24 are amplified 22 and applied to the variable intensity light-emitting transducers 14, 16 both of which record on the track W. The transducers may be solid state devices with their light-emitting junctions disposed with their long dimensions at 45 degrees to the direction of movement of the film 8 and perpendicular to each other. Alternatively the transducers may be conventional variable intensity light screens projecting light on to the film via narrow slots or slits disposed similarly to the light emitting junctions. The separate signals are played back by photo-cells receiving light via the film track and slots similarly disposed to the recording elongate areas. The signals may be further separated by recording on colour film using a different colour for each channel.
GB3268567A 1966-07-18 1967-07-17 Optical recording of superimposed sound tracks. Expired GB1171716A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US56588266A 1966-07-18 1966-07-18

Publications (1)

Publication Number Publication Date
GB1171716A true GB1171716A (en) 1969-11-26

Family

ID=24260517

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3268567A Expired GB1171716A (en) 1966-07-18 1967-07-17 Optical recording of superimposed sound tracks.

Country Status (2)

Country Link
DE (1) DE1572397A1 (en)
GB (1) GB1171716A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984003986A1 (en) * 1983-04-07 1984-10-11 Comtech Res Unit Optical data storage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984003986A1 (en) * 1983-04-07 1984-10-11 Comtech Res Unit Optical data storage
EP0122144A1 (en) * 1983-04-07 1984-10-17 Plasmon Data Systems N.V. Optical data storage
US4703469A (en) * 1983-04-07 1987-10-27 Plasmon Data Systems, P.V. Optical data recording using radiation of different characteristics

Also Published As

Publication number Publication date
DE1572397A1 (en) 1970-04-09

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees