GB561844A - Improvements in electro optical systems for the reproduction of multi-coloured originals - Google Patents

Improvements in electro optical systems for the reproduction of multi-coloured originals

Info

Publication number
GB561844A
GB561844A GB15372/42A GB1537242A GB561844A GB 561844 A GB561844 A GB 561844A GB 15372/42 A GB15372/42 A GB 15372/42A GB 1537242 A GB1537242 A GB 1537242A GB 561844 A GB561844 A GB 561844A
Authority
GB
United Kingdom
Prior art keywords
colour
reproduction
optical systems
originals
electro optical
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
GB15372/42A
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.)
Kodak Ltd
Original Assignee
Kodak 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 Kodak Ltd filed Critical Kodak Ltd
Publication of GB561844A publication Critical patent/GB561844A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control
    • H04N1/6016—Conversion to subtractive colour signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control

Abstract

561,844. Copying in colour by scanning. KODAK, Ltd. Nov. 2, 1942, No. 15372. Convention date, Nov. 1, 1941. Drawings to Specification. [Class 40 (iii)] In the electro-optical reproduction of multicoloured originals, colour correction is obtained by producing in separate channels separate electric currents corresponding respectively to a colour to be corrected and to the correcting colour, so amplifying the respective currents that the current intensity of the correcting colour is less than the current intensity of the colour to be corrected, feeding one of these currents to one of the ribbons of a ribbon-type light-valve having two substantially parallel ribbons, and feeding the other current to the other ribbon. Specifications 488,836, 538,012, 538,013, 552,367, and 561,845 ; and U.S.A. Specifications 2,176,518 and 2,221,037 are referred to.
GB15372/42A 1941-11-01 1942-11-02 Improvements in electro optical systems for the reproduction of multi-coloured originals Expired GB561844A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US417540A US2313542A (en) 1941-11-01 1941-11-01 Electro-optical color reproduction circuit

Publications (1)

Publication Number Publication Date
GB561844A true GB561844A (en) 1944-06-07

Family

ID=23654399

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15372/42A Expired GB561844A (en) 1941-11-01 1942-11-02 Improvements in electro optical systems for the reproduction of multi-coloured originals

Country Status (2)

Country Link
US (1) US2313542A (en)
GB (1) GB561844A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2560567A (en) * 1946-10-09 1951-07-17 Norman R Gunderson Apparatus and method for use in color reproduction
US2567240A (en) * 1947-10-29 1951-09-11 Miehle Printing Press & Mfg Color facsimile system
US2606245A (en) * 1948-03-10 1952-08-05 Time Inc Unsharp mask in electronic color correction
US2691696A (en) * 1950-10-27 1954-10-12 Eastman Kodak Co Electrooptical unsharp masking in color reproduction
US2808453A (en) * 1953-06-01 1957-10-01 Rca Corp Color correction systems
US2871287A (en) * 1953-06-11 1959-01-27 James R R Harter Photographic reproduction method and apparatus

Also Published As

Publication number Publication date
US2313542A (en) 1943-03-09

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