GB1422770A - Colour filter devices for photographic printing rear spot guide fog lamp - Google Patents

Colour filter devices for photographic printing rear spot guide fog lamp

Info

Publication number
GB1422770A
GB1422770A GB3387471A GB3387471A GB1422770A GB 1422770 A GB1422770 A GB 1422770A GB 3387471 A GB3387471 A GB 3387471A GB 3387471 A GB3387471 A GB 3387471A GB 1422770 A GB1422770 A GB 1422770A
Authority
GB
United Kingdom
Prior art keywords
colour filter
photographic printing
fog lamp
filter devices
spot guide
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
GB3387471A
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.)
Tebbutt E J
Original Assignee
Tebbutt E J
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 Tebbutt E J filed Critical Tebbutt E J
Priority to GB3387471A priority Critical patent/GB1422770A/en
Publication of GB1422770A publication Critical patent/GB1422770A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
    • G03B27/73—Controlling exposure by variation of spectral composition, e.g. multicolor printers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
    • G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Optics & Photonics (AREA)
  • Optical Filters (AREA)

Abstract

1422770 Colour filter J T JONES 19 March 1973 [20 Jan 1972] 33874/71 Heading G2J A colour filter device for colour reversal photographic printing comprises a wheel rotatably mounted on a support and comprising three separate elements containing optical filters A, B, C respectively coloured blue, green and red, the elements being relatively adjustable to vary the proportions of the colours. Each element covers half a circle, so that the element A, for example, comprises a clear blue portion 14, and portions 18, 19 overlapping the zones C, B, and the three elements are mounted on a central boss about which they are independently moveable, being locked in adjusted position or held by friction.
GB3387471A 1972-01-20 1972-01-20 Colour filter devices for photographic printing rear spot guide fog lamp Expired GB1422770A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3387471A GB1422770A (en) 1972-01-20 1972-01-20 Colour filter devices for photographic printing rear spot guide fog lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3387471A GB1422770A (en) 1972-01-20 1972-01-20 Colour filter devices for photographic printing rear spot guide fog lamp

Publications (1)

Publication Number Publication Date
GB1422770A true GB1422770A (en) 1976-01-28

Family

ID=10358574

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3387471A Expired GB1422770A (en) 1972-01-20 1972-01-20 Colour filter devices for photographic printing rear spot guide fog lamp

Country Status (1)

Country Link
GB (1) GB1422770A (en)

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Legal Events

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