GB1001537A - Improvements in or relating to colour television cameras - Google Patents

Improvements in or relating to colour television cameras

Info

Publication number
GB1001537A
GB1001537A GB31929/63A GB3192963A GB1001537A GB 1001537 A GB1001537 A GB 1001537A GB 31929/63 A GB31929/63 A GB 31929/63A GB 3192963 A GB3192963 A GB 3192963A GB 1001537 A GB1001537 A GB 1001537A
Authority
GB
United Kingdom
Prior art keywords
light
aperture
blue
component
colour
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
GB31929/63A
Inventor
Neville Norman Parker-Smith
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi 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 Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB31929/63A priority Critical patent/GB1001537A/en
Priority to FR983760A priority patent/FR1404836A/en
Publication of GB1001537A publication Critical patent/GB1001537A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Optical Filters (AREA)

Abstract

1,001,537. Colour television. MARCONI Ltd. April 3, 1964 [Aug. 13, 1963], No. 31929/63. Heading H4A. [Also in Division G2] In a colour television camera light stop means is arranged to provide a larger aperture for light of the component colour of least effective luminance value than for light of the other component colours. Where the component colours are red, green and blue, blue is the component selected. In a simultaneous system a common light stop may be arranged as illustrated with a central clear aperture 1 and an annular surround of blue transmitting medium 2. The aperture 1 may be of a size to provide an aperture of f/30 for the red and green light and the annulus 2 may be dimensioned so as to provide an aperture of f/11 for the blue light. In a simultaneous system where the component images are formed over separate light paths a light stop of different aperture may be provided in each path. In a sequential system utilizing a rotating colour filter, the filter sections are arranged to constitute light stops of different size. Reference is made to the use of adjustable apertures, and neutral density wedges to control the general level of illumination. The invention is stated to be of particular use in television apparatus which is employed in aircraft visual flight simulators.
GB31929/63A 1963-08-13 1963-08-13 Improvements in or relating to colour television cameras Expired GB1001537A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB31929/63A GB1001537A (en) 1963-08-13 1963-08-13 Improvements in or relating to colour television cameras
FR983760A FR1404836A (en) 1963-08-13 1964-07-31 Improvements to color television cameras

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31929/63A GB1001537A (en) 1963-08-13 1963-08-13 Improvements in or relating to colour television cameras

Publications (1)

Publication Number Publication Date
GB1001537A true GB1001537A (en) 1965-08-18

Family

ID=10330496

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31929/63A Expired GB1001537A (en) 1963-08-13 1963-08-13 Improvements in or relating to colour television cameras

Country Status (1)

Country Link
GB (1) GB1001537A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4315675A (en) * 1979-12-31 1982-02-16 Polaroid Corporation Method and apparatus for selectively positioning spectral filter
US4376889A (en) * 1977-06-04 1983-03-15 Pilkington P.E. Limited Low light level vision apparatus
US4542973A (en) * 1980-10-06 1985-09-24 Polaroid Corporation Dynamically controlled scene radiation leakage for exposure control
US5534924A (en) * 1991-03-05 1996-07-09 Thomson Broadcast Method and device to obtain an element of information on depth in the field seen by picture-shooting device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4376889A (en) * 1977-06-04 1983-03-15 Pilkington P.E. Limited Low light level vision apparatus
US4315675A (en) * 1979-12-31 1982-02-16 Polaroid Corporation Method and apparatus for selectively positioning spectral filter
US4542973A (en) * 1980-10-06 1985-09-24 Polaroid Corporation Dynamically controlled scene radiation leakage for exposure control
US5534924A (en) * 1991-03-05 1996-07-09 Thomson Broadcast Method and device to obtain an element of information on depth in the field seen by picture-shooting device

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