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sensitized film

  • 1 valoherkkä filmi

    • sensitized film
    • photo-sensitive film

    Suomi-Englanti sanakirja > valoherkkä filmi

  • 2 светочувствительная плёнка

    Универсальный русско-английский словарь > светочувствительная плёнка

  • 3 valoherkkä kalvo

    • photo-sensitive film
    • photo-sensitive foil
    • sensitized film

    Suomi-Englanti sanakirja > valoherkkä kalvo

  • 4 светочувствительная пленка

    light-sensitive film, sensitized film

    Русско-английский политехнический словарь > светочувствительная пленка

  • 5 сенсибилизированная плёнка

    Engineering: sensitized film

    Универсальный русско-английский словарь > сенсибилизированная плёнка

  • 6 Godowsky, Leopold Jr

    [br]
    b. 27 May 1900 Chicago, Illinois, USA d. 1983
    [br]
    American musician and photographic experimenter whose researches, with those of his colleague Mannes, led to the introduction of the first commercial tripack colour film, Kodachrome.
    [br]
    Both from distinguished musical families, Godowsky and Leopold Damrosch Mannes met at Riverdale School in New York in 1916, and shared an interest in photography. They began experiments in methods of additive colour photography, gaining a patent for a three-colour projector. Godowsky went to the University of California to study chemistry, physics and mathematics, while working as a professional violinist; Mannes, a pianist, went to Harvard to study music and physics. They kept in touch, and after graduating they joined up in New York, working as musicians and experimenting in colour photography in their spare time.
    Initially working in kitchens and bathrooms, they succeeded in creating a two-layer colour photographic plate, with emulsions separately sensitized to parts of the spectrum, and patented the process. This achievement was all the greater since they were unable to make the emulsions themselves and had to resort to buying commercial photographic plates so that they could scrape off the emulsions, remelt them and coat their experimental materials. In 1922 their work came to the attention of C.E.K. Mees, the leading photographic scientist and Director of the Eastman Kodak Research Laboratory in Rochester, New York. Mees arranged for plates to be coated to their specifications. With a grant from Kuhn, Loeb \& Co. they were able to rent laboratory space. Learning of Rudolf Fischer's early work on dye couplers, they worked to develop a new process incorporating them. Mees saw that their work, however promising, would not develop in an amateur laboratory, and in 1930 he invited them to join the Kodak Research Laboratory, where they arrived on 15 June 1931. Their new colleagues worked on ways of coating multi-layer film, while Mannes and Godowsky worked out a method of separately processing the individual layers in the exposed film. The result was Kodachrome film, the first of the modern integral tripack films, launched on 15 April 1935.
    They remained with Eastman Kodak until December 1939; their work contributed to the later appearance of Ektachrome colour-reversal film and the Kodacolor and Eastman Color negative-positive colour processes. Mannes became the Director of his father's Music Academy in New York, remaining as such until his death in 1964. Godowsky returned to Westport, Connecticut, and continued to study mathematics at Columbia University. He carried out photographic research un his private laboratory up until the time of his death in 1983.
    [br]
    Further Reading
    C.E.K.Mees, 1961, From Dry Plates to Ektachrome Film, New York.
    BC

    Biographical history of technology > Godowsky, Leopold Jr

  • 7 Talbot, William Henry Fox

    [br]
    b. 11 February 1800 Melbury, England
    d. 17 September 1877 Lacock, Wiltshire, England
    [br]
    English scientist, inventor of negative—positive photography and practicable photo engraving.
    [br]
    Educated at Harrow, where he first showed an interest in science, and at Cambridge, Talbot was an outstanding scholar and a formidable mathematician. He published over fifty scientific papers and took out twelve English patents. His interests outside the field of science were also wide and included Assyriology, etymology and the classics. He was briefly a Member of Parliament, but did not pursue a parliamentary career.
    Talbot's invention of photography arose out of his frustrating attempts to produce acceptable pencil sketches using popular artist's aids, the camera discura and camera lucida. From his experiments with the former he conceived the idea of placing on the screen a paper coated with silver salts so that the image would be captured chemically. During the spring of 1834 he made outline images of subjects such as leaves and flowers by placing them on sheets of sensitized paper and exposing them to sunlight. No camera was involved and the first images produced using an optical system were made with a solar microscope. It was only when he had devised a more sensitive paper that Talbot was able to make camera pictures; the earliest surviving camera negative dates from August 1835. From the beginning, Talbot noticed that the lights and shades of his images were reversed. During 1834 or 1835 he discovered that by placing this reversed image on another sheet of sensitized paper and again exposing it to sunlight, a picture was produced with lights and shades in the correct disposition. Talbot had discovered the basis of modern photography, the photographic negative, from which could be produced an unlimited number of positives. He did little further work until the announcement of Daguerre's process in 1839 prompted him to publish an account of his negative-positive process. Aware that his photogenic drawing process had many imperfections, Talbot plunged into further experiments and in September 1840, using a mixture incorporating a solution of gallic acid, discovered an invisible latent image that could be made visible by development. This improved calotype process dramatically shortened exposure times and allowed Talbot to take portraits. In 1841 he patented the process, an exercise that was later to cause controversy, and between 1844 and 1846 produced The Pencil of Nature, the world's first commercial photographically illustrated book.
    Concerned that some of his photographs were prone to fading, Talbot later began experiments to combine photography with printing and engraving. Using bichromated gelatine, he devised the first practicable method of photo engraving, which was patented as Photoglyphic engraving in October 1852. He later went on to use screens of gauze, muslin and finely powdered gum to break up the image into lines and dots, thus anticipating modern photomechanical processes.
    Talbot was described by contemporaries as the "Father of Photography" primarily in recognition of his discovery of the negative-positive process, but he also produced the first photomicrographs, took the first high-speed photographs with the aid of a spark from a Leyden jar, and is credited with proposing infra-red photography. He was a shy man and his misguided attempts to enforce his calotype patent made him many enemies. It was perhaps for this reason that he never received the formal recognition from the British nation that his family felt he deserved.
    [br]
    Principal Honours and Distinctions
    FRS March 1831. Royal Society Rumford Medal 1842. Grand Médaille d'Honneur, L'Exposition Universelle, Paris, 1855. Honorary Doctorate of Laws, Edinburgh University, 1863.
    Bibliography
    1839, "Some account of the art of photographic drawing", Royal Society Proceedings 4:120–1; Phil. Mag., XIV, 1839, pp. 19–21.
    8 February 1841, British patent no. 8842 (calotype process).
    1844–6, The Pencil of Nature, 6 parts, London (Talbot'a account of his invention can be found in the introduction; there is a facsimile edn, with an intro. by Beamont Newhall, New York, 1968.
    Further Reading
    H.J.P.Arnold, 1977, William Henry Fox Talbot, London.
    D.B.Thomas, 1964, The First Negatives, London (a lucid concise account of Talbot's photograph work).
    J.Ward and S.Stevenson, 1986, Printed Light, Edinburgh (an essay on Talbot's invention and its reception).
    H.Gernsheim and A.Gernsheim, 1977, The History of Photography, London (a wider picture of Talbot, based primarily on secondary sources).
    JW

    Biographical history of technology > Talbot, William Henry Fox

  • 8 Mees, Charles Edward Kenneth

    [br]
    b. 1882 Wellingborough, England
    d. 1960 USA
    [br]
    Anglo-American photographic scientist and Director of Research at the Kodak Research Laboratory.
    [br]
    The son of a Wesleyan minister, Mees was interested in chemistry from an early age and studied at St Dunstan's College in Catford, where he met Samuel E.Sheppard, with whom he went on to University College London in 1900. They worked together on a thesis for BSc degrees in 1903, developing the work begun by Hurter and Driffield on photographic sensitometry. This and other research papers were published in 1907 in the book Investigations on the Theory of the Photographic Process, which became a standard reference work. After obtaining a doctorate in 1906, Mees joined the firm of Wratten \& Wainwright (see F.C.L.Wratten), manufacturers of dry plates in Croydon; he started work on 1 April 1906, first tackling the problem of manufacturing colour-sensitive emulsions and enabling the company to market the first fully panchromatic plates from the end of that year.
    During the next few years Mees ran the commercial operation of the company as Managing Director and carried out research into new products, including filters for use with the new emulsions. In January 1912 he was visited by George Eastman, the American photographic manufacturer, who asked him to go to Rochester, New York, and set up a photographic research laboratory in the Kodak factory there. Wratten was prepared to release Mees on condition that Eastman bought the company; thus, Wratten and Wainwright became part of Kodak Ltd, and Mees left for America. He supervised the construction of a building in the heart of Kodak Park, and the building was fully equipped not only as a research laboratory, but also with facilities for coating and packing sensitized materials. It also had the most comprehensive library of photographic books in the world. Work at the laboratory started at the beginning of 1913, with a staff of twenty recruited from America and England, including Mees's collaborator of earlier years, Sheppard. Under Mees's direction there flowed from the Kodak research Laboratory a constant stream of discoveries, many of them leading to new products. Among these were the 16 mm amateur film-making system launched in 1923; the first amateur colour-movie system, Kodacolor, in 1928; and 8 mm home movies, in 1932. His support for the young experimenters Mannes and Godowsky, who were working on colour photography, led to their joining the Research Laboratory and to the introduction of the first multi-layer colour film, Kodachrome, in 1935. Eastman had agreed from the beginning that as much of the laboratory's work as possible should be published, and Mees himself wrote prolifically, publishing over 200 articles and ten books. While he made significant contributions to the understanding of the photographic process, particularly through his early research, it is his creation and organization of the Kodak Research Laboratory that is his lasting memorial. His interests were many and varied, including Egyptology, astronomy, marine biology and history. He was a Fellow of the Royal Society.
    [br]
    Principal Honours and Distinctions
    FRS.
    Bibliography
    1961, From Dry Plates to Ektachrome Film, New York (partly autobiographical).
    BC

    Biographical history of technology > Mees, Charles Edward Kenneth

  • 9 Schichtseite

    f <tech.allg> (Film, Magnetband, Diskette, Festplatte) ■ emulsion surface
    f <tech.allg> (beschriebene Seite eines Datenträgers) ■ sensitized side
    f <el> (von magnet. Speichermedien, z.B. Ton- und Videobänder) ■ active surface
    f < phot> ■ emulsion side

    German-english technical dictionary > Schichtseite

  • 10 Watkins, Alfred

    [br]
    b. 1854 Hereford, England
    d. 7 April 1935 Hereford, England
    [br]
    English photographer who developed the first practical exposure-measuring system.
    [br]
    His first patent was granted on 27 January 1890 and described a method of measuring the "actinic" value of light as a means of determining exposure. A strip of sensitized paper which darkened on exposure to light was used, and the time taken for it to darken to match a standard tint was measured. This time could be used to calculate the necessary exposure time, taking into account the speed of the plate, shutter speed and aperture. Watkins marketed a number of these actinometer designs, of which the most popular was the Watkins Bee Meter, which was in a pocket-watch form, introduced in 1903 and remaining on sale until 1939. Watkins was concerned that photographers recognize that exposure measurement had to take into account the effect of development time and temperature. In 1893 he devised the concept of the "Watkins Factor": he showed that when plates were developed by inspection, as was the practice at the time, a fixed relationship existed between the time of the first appearance of the image and the total time required to give a fully developed negative. The Watkins Factor was the figure that the first time must be multiplied by to give the second time. Watkins published tables of factors for different brands of plates and for different developers, and marketed various aids such as specially calibrated thermometers and clocks, as aids in using "Fac-torial Development" to give consistent negatives. After the early years of the twentieth century Watkins gave up direct participation in photography and devoted his time to a variety of interests, including the plotting of ley lines in England.
    BC

    Biographical history of technology > Watkins, Alfred

См. также в других словарях:

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  • Celluloid film — Film Film, n. [AS. film skin, fr. fell skin; akin to fylmen membrane, OFries. filmene skin. See {Fell} skin.] 1. A thin skin; a pellicle; a membranous covering, causing opacity. [1913 Webster] He from thick films shall purge the visual ray. Pope …   The Collaborative International Dictionary of English

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