GB690482A - Improvements relating to apparatus for scanning cinematograph film for the purpose of generating or recording television signals - Google Patents

Improvements relating to apparatus for scanning cinematograph film for the purpose of generating or recording television signals

Info

Publication number
GB690482A
GB690482A GB118949A GB118949A GB690482A GB 690482 A GB690482 A GB 690482A GB 118949 A GB118949 A GB 118949A GB 118949 A GB118949 A GB 118949A GB 690482 A GB690482 A GB 690482A
Authority
GB
United Kingdom
Prior art keywords
output
raster
film
scanning
lead
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
GB118949A
Inventor
Bernard Randolph Greenhead
Herbert Edward Holman
Frank Runcorn Trott
Eric Lawrence Casling White
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Publication of GB690482A publication Critical patent/GB690482A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/36—Scanning of motion picture films, e.g. for telecine
    • H04N3/38—Scanning of motion picture films, e.g. for telecine with continuously moving film
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/32—Details specially adapted for motion-picture projection
    • G03B21/43—Driving mechanisms
    • G03B21/44—Mechanisms transmitting motion to film-strip feed; Mechanical linking of shutter and intermittent feed
    • G03B21/46—Mechanisms transmitting motion to film-strip feed; Mechanical linking of shutter and intermittent feed affording adjustment for framing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Details Of Television Scanning (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Radiography Using Non-Light Waves (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Studio Devices (AREA)

Abstract

690,482. Television. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Jan. 5, 1950 [Jan. 15, 1949], No. 1189/49. Class 40 (iii): In television transmitting or receiving apparatus in which each frame of a continuouslymoving film 8 is successively scanned by the two component frames of an interlaced scanning raster, incorrect interlacing due to film shrinkage or stretching is prevented by fitting generators 22, 24 to the shafts of a freelyrotating sprocket wheel 10 and a driven sprocket wheel 11, comparing the phases of the generator outputs in a phase-comparator 27, 32 and using the resultant output to adjust the relative positions of the raster components. As shown, the raster components are produced by optical systems 36, 37 in association with a cathode-ray tube 1 and are rendered effective alternately by a shutter 38. The D.C. output of the phase-comparator is fed over lead 33 to a modulator 34 also fed by a square-wave generator 35 and the arrangement is such that, with no output on lead 33, there is no output from modulator 34 but any potential produced in lead 33 due to distortion of the film produces a square-wave output which is applied to the frame-scanning generator 7 to shift the raster components in the appropriate direction for compensation. Alternatively, the compensation may be applied mechanically by a servo-mechanism to the optical systems 36, 37. Specifications 475,032, 639,785 and 690,487 are referred to.
GB118949A 1950-05-25 1949-01-15 Improvements relating to apparatus for scanning cinematograph film for the purpose of generating or recording television signals Expired GB690482A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1310550A GB721992A (en) 1950-05-25 1950-05-25 Improvements in or relating to apparatus for scanning cinematograph film, for the purpose of generating or recording television signals

Publications (1)

Publication Number Publication Date
GB690482A true GB690482A (en) 1953-04-22

Family

ID=10016920

Family Applications (3)

Application Number Title Priority Date Filing Date
GB3232549A Expired GB690487A (en) 1950-05-25 1949-01-15 Improvements relating to apparatus for controlling the time relationship between different occurrences, especially as applied to apparatus for scanning cinematograph film for the purpose of generating or recording television signals
GB118949A Expired GB690482A (en) 1950-05-25 1949-01-15 Improvements relating to apparatus for scanning cinematograph film for the purpose of generating or recording television signals
GB1310550A Expired GB721992A (en) 1950-05-25 1950-05-25 Improvements in or relating to apparatus for scanning cinematograph film, for the purpose of generating or recording television signals

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB3232549A Expired GB690487A (en) 1950-05-25 1949-01-15 Improvements relating to apparatus for controlling the time relationship between different occurrences, especially as applied to apparatus for scanning cinematograph film for the purpose of generating or recording television signals

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB1310550A Expired GB721992A (en) 1950-05-25 1950-05-25 Improvements in or relating to apparatus for scanning cinematograph film, for the purpose of generating or recording television signals

Country Status (1)

Country Link
GB (3) GB690487A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2922841A (en) * 1953-08-17 1960-01-26 Motorola Inc Film scanning system
US3014090A (en) * 1959-03-03 1961-12-19 Wayne D Bartley Picture recording apparatus
CN108279548A (en) * 2017-01-06 2018-07-13 深圳市光峰光电技术有限公司 Optical projection system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002423A (en) * 1956-04-26 1961-10-03 Bauer Eugen Gmbh Cinematographic projector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2922841A (en) * 1953-08-17 1960-01-26 Motorola Inc Film scanning system
US3014090A (en) * 1959-03-03 1961-12-19 Wayne D Bartley Picture recording apparatus
CN108279548A (en) * 2017-01-06 2018-07-13 深圳市光峰光电技术有限公司 Optical projection system

Also Published As

Publication number Publication date
GB690487A (en) 1953-04-22
GB721992A (en) 1955-01-19

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