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original radiation

  • 1 venta original

    • radiation selling

    Diccionario Técnico Español-Inglés > venta original

  • 2 venta original

    f.
    radiation selling.

    Spanish-English dictionary > venta original

  • 3 первичное излучение

    1) Medicine: primary radiation
    2) Metallurgy: original radiation
    3) Geophysics: primary emission

    Универсальный русско-английский словарь > первичное излучение

  • 4 Sutton, Thomas

    [br]
    b. 1819 England
    d. 1875 Jersey, Channel Islands
    [br]
    English photographer and writer on photography.
    [br]
    In 1841, while studying at Cambridge, Sutton became interested in photography and tried out the current processes, daguerreotype, calotype and cyanotype among them. He subsequently settled in Jersey, where he continued his photographic studies. In 1855 he opened a photographic printing works in Jersey, in partnership with L.-D. Blanquart- Evrard, exploiting the latter's process for producing developed positive prints. He started and edited one of the first photographic periodicals, Photographic Notes, in 1856; until its cessation in 1867, his journal presented a fresher view of the world of photography than that given by its London-based rivals. He also drew up the first dictionary of photography in 1858.
    In 1859 Sutton designed and patented a wideangle lens in which the space between two meniscus lenses, forming parts of a sphere and sealed in a metal rim, was filled with water; the lens so formed could cover an angle of up to 120 degrees at an aperture of f12. Sutton's design was inspired by observing the images produced by the water-filled sphere of a "snowstorm" souvenir brought home from Paris! Sutton commissioned the London camera-maker Frederick Cox to make the Panoramic camera, demonstrating the first model in January 1860; it took panoramic pictures on curved glass plates 152×381 mm in size. Cox later advertised other models in a total of four sizes. In January 1861 Sutton handed over manufacture to Andrew Ross's son Thomas Ross, who produced much-improved lenses and also cameras in three sizes. Sutton then developed the first single-lens reflex camera design, patenting it on 20 August 1961: a pivoted mirror, placed at 45 degrees inside the camera, reflected the image from the lens onto a ground glass-screen set in the top of the camera for framing and focusing. When ready, the mirror was swung up out of the way to allow light to reach the plate at the back of the camera. The design was manufactured for a few years by Thomas Ross and J.H. Dallmeyer.
    In 1861 James Clerk Maxwell asked Sutton to prepare a series of photographs for use in his lecture "On the theory of three primary colours", to be presented at the Royal Institution in London on 17 May 1861. Maxwell required three photographs to be taken through red, green and blue filters, which were to be printed as lantern slides and projected in superimposition through three projectors. If his theory was correct, a colour reproduction of the original subject would be produced. Sutton used liquid filters: ammoniacal copper sulphate for blue, copper chloride for the green and iron sulphocyanide for the red. A fourth exposure was made through lemon-yellow glass, but was not used in the final demonstration. A tartan ribbon in a bow was used as the subject; the wet-collodion process in current use required six seconds for the blue exposure, about twice what would have been needed without the filter. After twelve minutes no trace of image was produced through the green filter, which had to be diluted to a pale green: a twelve-minute exposure then produced a serviceable negative. Eight minutes was enough to record an image through the red filter, although since the process was sensitive only to blue light, nothing at all should have been recorded. In 1961, R.M.Evans of the Kodak Research Laboratory showed that the red liquid transmitted ultraviolet radiation, and by an extraordinary coincidence many natural red dye-stuffs reflect ultraviolet. Thus the red separation was made on the basis of non-visible radiation rather than red, but the net result was correct and the projected images did give an identifiable reproduction of the original. Sutton's photographs enabled Maxwell to establish the validity of his theory and to provide the basis upon which all subsequent methods of colour photography have been founded.
    JW / BC

    Biographical history of technology > Sutton, Thomas

  • 5 удовлетворительный

    •

    There was a workable theory.

    Русско-английский научно-технический словарь переводчика > удовлетворительный

  • 6 fuente2

    2 = parent, source.
    Ex. Most bibliographic databases evolved from a parent abstracting or indexing publication.
    Ex. The network is fairly well developed and lobbying initiatives on policies affecting all or a group of local authorities have stemmed from this source.
    ----
    * código fuente = source code.
    * credibilidad de las fuentes = source credibility.
    * documento fuente = original document, parent document, source document.
    * el dinero es la fuente de todos los males = money is the root of all evil.
    * formato fuente = source format.
    * fuente bibliográfica = bibliographic source, bibliographical source.
    * fuente bibliográfica especializada = specialist bibliographic source.
    * fuente de alimentación = power source.
    * fuente de alimentos = food supply, supply of food.
    * fuente de conflicto = source of conflict.
    * fuente de energía = energy source, source of energy, power source.
    * fuente de energía(s) alternativa(s) = alternative energy source.
    * fuente de información = information source, information store, source of information, source of data.
    * fuente de información electrónica = electronic information source.
    * fuente de ingresos = revenue stream, source of revenue, source of income, revenue base, revenue earner.
    * fuente de los deseos = wishing well.
    * fuente de luz = light source.
    * fuente de provisión = source of supply.
    * fuente de radiación = radiation source.
    * fuente de referencia = information source, reference source, source of help.
    * fuente de suministro = source of supply.
    * fuente de todos los males, la = root of all evil, the.
    * fuente donde se puede encontrar todo sobre Algo = one stop shop.
    * fuente histórica = historical record.
    * fuente oral = oral source.
    * fuente para beber = scuttlebutt, drinking fountain.
    * fuente primaria = primary source, source material.
    * fuente principal de información = chief source of information.
    * fuentes de información = information base.
    * fuente secundaria = secondary source, finding aid.
    * fuentes oficiosas = grapevine.
    * guía de fuentes de información = pathfinder.
    * Indice de Fuentes = source index, Source Index.
    * información de fuente fidedigna = authoritative information.
    * obra fuente de la cita = citing work.
    * programa fuente = source programme.
    * tesauro fuente = source thesaurus.
    * texto fuente = copy-text.
    * una fuente de = a treasure trove of.
    * una fuente inagotable de = a treasure house of.
    * una única fuente para Algo = one-stop, one-stop shopping, one stop shop.

    Spanish-English dictionary > fuente2

  • 7 fuente

    adj.
    source.
    f.
    fuente de agua potable drinking fountain
    fuente termal thermal spring
    2 (serving) dish (bandeja).
    3 source (origen).
    fuente de energía energy source
    fuente de energía renovable renewable energy source
    fuente de ingresos source of income
    fuente de riqueza source of wealth
    4 source.
    según fuentes del ministerio de Educación,… according to Ministry of Education sources,…
    fuentes oficiosas/oficiales unofficial/official sources
    5 font (Imprenta).
    6 spring, headspring, fountainhead, springhead.
    7 drinking fountain.
    8 platter, serving dish, server.
    9 gas station, station.
    * * *
    1 (manantial) spring
    2 (artificial) fountain
    3 (recipiente) serving dish, dish
    4 figurado source
    \
    de buena fuente from reliable sources
    de fuente fidedigna from reliable sources
    * * *
    noun f.
    3) source, origin
    * * *
    SF
    1) (=construcción) fountain; (=manantial) spring
    - abrir la fuente de las lágrimas
    2) (Culin) serving dish, platter

    fuente de hornear, fuente de horno — ovenproof dish

    3) (=origen) source, origin

    de fuente desconocida/fidedigna — from an unknown/a reliable source

    fuente de alimentación — (Inform) power supply

    * * *
    1) ( manantial) spring
    2) (construcción, monumento) fountain
    3) ( plato) dish
    4)
    a) ( origen) source
    b) ( de información) source

    una información de buena fuente or de fuentes fidedignas or de toda solvencia — information from reliable sources

    * * *
    1) ( manantial) spring
    2) (construcción, monumento) fountain
    3) ( plato) dish
    4)
    a) ( origen) source
    b) ( de información) source

    una información de buena fuente or de fuentes fidedignas or de toda solvencia — information from reliable sources

    * * *
    fuente1
    1 = fountain, spring, water fountain.

    Ex: This process is similar to the way jets of water in illuminated fountains trap the light from underwater light sources.

    Ex: This is in fulfillment of the Claverhouse dictum that unless staff members have the opportunity to develop as people their inspirational springs will become mere trickles.
    Ex: The farm supplies visitors with high-quality natural environment (landscape, forest, water fountains, ecological food), accommodation, and other services.
    * fuente con peces = fish pond [fishpond].
    * fuente de agua = drinking fountain, water fountain, bubbler.
    * fuente para beber = water fountain, bubbler.
    * fuentes termales = hot springs.

    fuente2
    2 = parent, source.

    Ex: Most bibliographic databases evolved from a parent abstracting or indexing publication.

    Ex: The network is fairly well developed and lobbying initiatives on policies affecting all or a group of local authorities have stemmed from this source.
    * código fuente = source code.
    * credibilidad de las fuentes = source credibility.
    * documento fuente = original document, parent document, source document.
    * el dinero es la fuente de todos los males = money is the root of all evil.
    * formato fuente = source format.
    * fuente bibliográfica = bibliographic source, bibliographical source.
    * fuente bibliográfica especializada = specialist bibliographic source.
    * fuente de alimentación = power source.
    * fuente de alimentos = food supply, supply of food.
    * fuente de conflicto = source of conflict.
    * fuente de energía = energy source, source of energy, power source.
    * fuente de energía(s) alternativa(s) = alternative energy source.
    * fuente de información = information source, information store, source of information, source of data.
    * fuente de información electrónica = electronic information source.
    * fuente de ingresos = revenue stream, source of revenue, source of income, revenue base, revenue earner.
    * fuente de los deseos = wishing well.
    * fuente de luz = light source.
    * fuente de provisión = source of supply.
    * fuente de radiación = radiation source.
    * fuente de referencia = information source, reference source, source of help.
    * fuente de suministro = source of supply.
    * fuente de todos los males, la = root of all evil, the.
    * fuente donde se puede encontrar todo sobre Algo = one stop shop.
    * fuente histórica = historical record.
    * fuente oral = oral source.
    * fuente para beber = scuttlebutt, drinking fountain.
    * fuente primaria = primary source, source material.
    * fuente principal de información = chief source of information.
    * fuentes de información = information base.
    * fuente secundaria = secondary source, finding aid.
    * fuentes oficiosas = grapevine.
    * guía de fuentes de información = pathfinder.
    * Indice de Fuentes = source index, Source Index.
    * información de fuente fidedigna = authoritative information.
    * obra fuente de la cita = citing work.
    * programa fuente = source programme.
    * tesauro fuente = source thesaurus.
    * texto fuente = copy-text.
    * una fuente de = a treasure trove of.
    * una fuente inagotable de = a treasure house of.
    * una única fuente para Algo = one-stop, one-stop shopping, one stop shop.

    fuente3
    3 = platter.

    Ex: All salads are served on platters with herbs, rolls or garlic bread.

    * fuente de marisco = shellfish platter.
    * fuente de pescado = seafood platter.

    fuente4
    4 = font.
    Nota: Conjunto de letras, signos y espacios en blanco usados en la composición de un texto.

    Ex: No longer is the user constrained to a supplied set of fonts.

    fuente5

    Ex: A fount of type was a set of letters and other symbols in which each was supplied in approximate proportion to its frequency of use, all being of one body-size and design.

    * * *
    A (manantial) spring
    fuente termal hot o thermal spring
    la fuente del río the source of the river
    B (construcción, monumento) fountain
    fuente de agua potable drinking fountain
    Compuestos:
    wishing well
    soda fountain ( AmE), snack bar
    C (plato) dish
    puso la carne en una fuente ovalada he put the joint on an oval (serving) dish o platter
    Compuesto:
    ovenproof dish
    D
    1 (origen) source
    la principal fuente de ingresos de esta zona the principal source of income in this region
    fuente de suministro source of supply
    esta enciclopedia es una buena fuente de datos this encyclopedia is a useful source of information
    tenemos informaciones de buena fuente or de fuentes fidedignas we have information from reliable sources
    según fuentes de toda solvencia or fuentes solventes according to reliable sources
    según fuentes de la Administración according to government sources
    E ( Impr) font
    * * *

     

    fuente sustantivo femenino
    1


    b) ( origen) source;


    fuente de ingresos source of income;
    información de buena fuente information from reliable sources
    2 ( construcción) fountain;

    3 ( plato) dish;

    fuente sustantivo femenino
    1 fountain
    2 (plato de servir) (serving) dish
    3 (origen de algo) source: fuentes literarias, literary sources
    fuentes de alimentación eléctrica, sources of electricity
    ' fuente' also found in these entries:
    Spanish:
    inagotable
    - secarse
    - taza
    - autorizado
    - cantarín
    - caño
    - divisa
    - enlozado
    - frágil
    - lapicera
    - luminoso
    - pila
    - pilón
    - pluma
    - secar
    English:
    baking dish
    - delight
    - dish
    - evenly
    - font
    - fountain
    - fountainhead
    - horse
    - informant
    - quotable
    - reliably
    - resource
    - source
    - spout
    - spring
    - thermal
    - typeface
    - unnamed
    - authority
    - baking
    - hot
    - pen
    - platter
    - regular
    - serving
    * * *
    fuente nf
    1. [para beber] fountain
    fuente de agua potable drinking fountain; Chile, Carib, Col, Méx fuente de soda [cafetería] = cafe or counter selling ice cream, soft drinks etc, US soda fountain
    2. [bandeja] (serving) dish
    3. [de información]
    no quiso revelar su fuente de información he didn't want to reveal the source of his information;
    fuentes oficiosas/oficiales unofficial/official sources;
    según fuentes del ministerio de Educación… according to Ministry of Education sources…;
    ha manejado gran número de fuentes para escribir su tesis she has made use of many sources to write her thesis
    4. [origen] source;
    la Biblia es la fuente de muchas obras medievales the Bible provides the source material for many medieval works
    fuente de energía energy source;
    fuente de energía ecológica/limpia/renovable environmentally friendly/clean/renewable source of energy;
    fuente de ingresos source of income;
    fuente de riqueza source of wealth
    5. [causa] cause, source;
    fuente de problemas a source of problems o trouble;
    la falta de higiene es fuente de infecciones lack of hygiene is a cause of infection
    6. [manantial] spring
    fuente termal thermal spring Informát power supply
    8. Imprenta font
    * * *
    f
    1 fountain; fig
    source
    2 recipiente dish
    3 INFOR font
    4 L.Am.
    bar soda fountain
    * * *
    fuente nf
    1) manantial: spring
    2) : fountain
    3) origen: source
    fuentes informativas: sources of information
    4) : platter, serving dish
    * * *
    1. (en una plaza, etc) fountain
    2. (manantial) spring
    3. (bandeja) dish [pl. dishes]
    4. (origen) source

    Spanish-English dictionary > fuente

  • 8 длина

    length, run, stretch
    * * *
    длина́ ж.
    length
    в длину́ — endways, endwise, lengthwise
    во всю длину́ — the full length
    на едини́цу длины́ — per unit (of) length
    нареза́ть [отреза́ть] что-л. по длине́ — cut smth. to the length of …
    по всей длине́ — along [through] the full length (e. g., of the building)
    длина́ анкеро́вки — anchorage length
    длина́ анте́нны, действи́тельная — effective [radiation] length of an aerial
    длина́ ба́зиса — base length
    длина́ ба́зы
    1. геод. base length
    длина́ ве́ктора — modulus [absolute value] of a vector
    длина́ взаимоде́йствия ( частиц) — interaction length
    длина́ взлё́тно-поса́дочной полосы́, исхо́дная — selected basic length of a runway
    длина́ витка́, сре́дняя (в обмо́тках) — length of an average [mean] turn of a coil, average [mean] length of a coil turn
    длина́ волны́ — wave-length
    длина́ волны́, грани́чная — cut-off [critical] wave-length
    длина́ волны́ де Бро́йля — de Broglie wave-length
    длина́ волны́, компто́новская — Compton wave-length
    длина́ волны́, крити́ческая — cut-off [critical] wave length
    длина́ волны́, основна́я — fundamental wave-length
    длина́ волны́, поро́говая — threshold wave-length
    длина́ волны́, преоблада́ющая — dominant wave-length
    длина́ волны́, со́бственная — natural wave-length
    длина́ вы́бега — coasting distance
    длина́ вы́лета (напр. струи воды) — range
    габари́тная длина́ — overall length
    длина́ геодези́ческой ли́нии — geodetic distance
    деба́евская длина́ — Debye length
    длина́ деба́евского экрани́рования — Debye shielding length
    диффузио́нная длина́ — diffusion length
    длина́ дуги́ геод. — arc distance
    едини́чная длина́ — unit length
    длина́ забо́рной ча́сти ( метчика) — chamfer length
    длина́ заде́лки армату́ры — length of an embedment
    длина́ заклё́пки, защемлё́нная — grip of a rivet
    длина́ зацепле́ния ( шестерён) — gear contact [engagement] length, length of action
    длина́ зо́нда — spacing of the sonde
    длина́ ка́меры горн. — depth of a room
    длина́ ка́меры сгора́ния ракет. — combustion-chamber length
    длина́ ка́меры сгора́ния, характеристи́ческая ракет. — characteristic combustion-chamber length
    длина́ когере́нтности — coherent wave [interrupted wave-train] length
    длина́ ко́довой комбина́ции вчт. — word length
    компари́рованная длина́ геод. — standard length
    длина́ консо́ли стр. — length of overhang, unsupported length
    кра́тная длина́ — multiple length
    длина́ кривоши́па — throw of a crank
    длина́ лё́тного по́ля — field length
    длина́ ма́зера, рабо́чая — active length of a maser
    длина́ математи́ческого ма́ятника — length of a simple pendulum, length of a pendulum
    длина́ ма́ятника, приведё́нная — the equivalent length of a pendulum
    длина́ нахлё́стки — lap of a splice
    несу́щая длина́ — bearing length
    длина́ о́бласти генера́ции — lasing length
    длина́ образу́ющей ко́нуса — slant height of a cone
    длина́ образца́ до испыта́ния — original length of a specimen
    длина́ образца́, расчё́тная ( для испытания материалов) — gauge length of a specimen
    обра́тная длина́ — reciprocal [inverse] length
    длина́ обто́чки — turning [machining] length
    опо́рная длина́ — bearing length
    длина́ опти́ческой волны́ — optical wave-length
    длина́ орби́ты — orbit circumference
    длина́ перено́са физ. — transport mean free path, transport length
    длина́ плато́ — plateau length
    длина́ плеча́ — reach of an arm
    длина́ поглоще́ния — absorption length, absorption path; опт. absorption thickness
    длина́ полосы́ набо́ра полигр. — depth of a page
    приведё́нная длина́ (напр. вала) — reduced length
    приведё́нная длина́ ма́ятника — length of an equivalent simple pendulum
    длина́ при продо́льном изги́бе, расчё́тная — effective length
    длина́ пробе́га
    1. ( частиц) range, track (path) length, path length
    2. ( самолета) landing run
    длина́ пробе́га до захва́та ( о частицах) — capture length
    длина́ пробе́га, по́лная ( о частицах) — maximum range, integral track [path] length
    длина́ прока́тки — mill length
    длина́ пролё́та стр. — span length
    длина́ прохо́дки горн. — amount of advance
    длина́ пути́ (напр. распространения волн, частиц) — path length
    длина́ пути́ луча́ — beam path length
    длина́ пути́, опти́ческая — optical length, optical path
    длина́ пути́, фа́зовая — phase-path length
    длина́ рабо́чей ча́сти шкалы́ — effective scale length
    длина́ разбе́га ( самолета) — take-off run
    длина́ разго́на волны́ (расстояние, пройденное ветром) — the fetch (the distance over which the fetch has been blowing)
    разрывна́я длина́ (напр. волокна) — breaking length
    длина́ распростране́ния — propagation distance
    длина́ рассе́яния — scattering length, scattering mean free path
    длина́ ре́зания — cutting length
    длина́ ре́зки прока́та, кра́тная — multiple length
    длина́ ре́зки прока́та, ме́рная — cut length
    длина́ ре́зки прока́та, неме́рная — random length
    длина́ руло́на прок. — coil length
    длина́ свобо́дного пробе́га ( частиц) — (mean) free path
    длина́ свобо́дного пробе́га для рассе́яния, столкнове́ния и т. п. ( о частицах) — scattering, collision, etc. (mean) free path
    длина́ свобо́дного пробе́га, сре́дняя ( о частицах) — mean free path length
    длина́ свя́зи хим. — bond length
    длина́ сло́ва вчт. — word length, (word) format
    со́бственная длина́ — proper length
    длина́ сообще́ния — message length
    длина́ спа́йки текст. — length of overlapping
    длина́ сте́ржня заклё́пки — grip length of a rivet
    длина́ сте́ржня, приведё́нная — unsupported length of a column
    длина́ сте́ржня, свобо́дная — unsupported length of a column
    длина́ стороны́ — lateral length
    длина́ строга́ния — planing length
    строи́тельная длина́ — face-to-face length
    длина́ строки́ телегр. — length of a scanning line
    длина́ строки́, поле́зная телегр. — available line
    длина́ су́дна ме́жду перпендикуля́рами — (ship's) length between perpendiculars
    длина́ су́дна, наибо́льшая — (ship's) length overall
    длина́ су́дна по ватерли́нии — (ship's) length on the water-line
    длина́ су́дна по конструкти́вной ватерли́нии — (ship's) length on the designed water-line
    длина́ су́дна, по́лная — (ship's) extreme length, (ship's) length overall
    длина́ торго́вого прока́та, норма́льная — commercial stock length
    длина́ траекто́рии ( частиц) — path length
    длина́ уча́стка разго́на ав. — (gross) distance to accelerate
    длина́ хо́да по́ршня — stroke
    электри́ческая длина́ ( линии передачи) — phase(-path) [electric] length
    этало́нная длина́ — standard length

    Русско-английский политехнический словарь > длина

  • 9 Yost, Paul Edward

    SUBJECT AREA: Aerospace
    [br]
    b. 30 June 1919 Bristow, Iowa, USA
    [br]
    American designer of balloons who reintroduced the hot-air balloon.
    [br]
    After the early hot-air balloons of the Montgolfier brothers in the 1780s, this branch of ballooning was superseded by hydrogen, coal gas and helium balloons. Following the research by Auguste Piccard into cosmic radiation during the 1930s, a renewed interest in this branch of research arose in the United States from 1947 onwards, using helium-filled balloons. Modern plastics were available by this time, and polythene was used for the envelopes.
    Paul E.Yost developed an improved form of envelope using nylon fabric laminated with mylar plastic film. This provided a strong impermeable material that was ideal for balloons. Using this material for the envelope, Yost produced the Vulcoon in 1960. He also reintroduced the use of hot air to inflate his balloon and developed an easily controlled gas burner fuelled by propane gas, which was readily available in cylinders for portable cooking stoves. Yost's company, Raven Industries, developed these very basic balloons as a military project. The pilot was suspended in a sling, but they improved the design by fitting wicker or aluminium baskets and turned to a market in the field of sport. After a slow start, hot-air ballooning became popular as a sport. In 1963 Yost made the first crossing of the English Channel in a hot-air balloon, accompanied by Donald Piccard, nephew of the balloonist Auguste Piccard, and Charles Dollfus, the eminent French aviation historian. Yost's attempt to cross the Atlantic in his balloon Silver Fox during 1976 failed and he was rescued from the sea near the Azores. The popularity of hot-air ballooning increased during the 1970s, and evolved into a very original form of advertising with unusual shapes for the envelopes, including a house, a bottle and an elephant.
    JDS

    Biographical history of technology > Yost, Paul Edward

  • 10 Zworykin, Vladimir Kosma

    [br]
    b. 30 July 1889 Mourum (near Moscow), Russia
    d. 29 July 1982 New York City, New York, USA
    [br]
    Russian (naturalized American 1924) television pioneer who invented the iconoscope and kinescope television camera and display tubes.
    [br]
    Zworykin studied engineering at the Institute of Technology in St Petersburg under Boris Rosing, assisting the latter with his early experiments with television. After graduating in 1912, he spent a time doing X-ray research at the Collège de France in Paris before returning to join the Russian Marconi Company, initially in St Petersburg and then in Moscow. On the outbreak of war in 1917, he joined the Russian Army Signal Corps, but when the war ended in the chaos of the Revolution he set off on his travels, ending up in the USA, where he joined the Westinghouse Corporation. There, in 1923, he filed the first of many patents for a complete system of electronic television, including one for an all-electronic scanning pick-up tube that he called the iconoscope. In 1924 he became a US citizen and invented the kinescope, a hard-vacuum cathode ray tube (CRT) for the display of television pictures, and the following year he patented a camera tube with a mosaic of photoelectric elements and gave a demonstration of still-picture TV. In 1926 he was awarded a PhD by the University of Pittsburgh and in 1928 he was granted a patent for a colour TV system.
    In 1929 he embarked on a tour of Europe to study TV developments; on his return he joined the Radio Corporation of America (RCA) as Director of the Electronics Research Group, first at Camden and then Princeton, New Jersey. Securing a budget to develop an improved CRT picture tube, he soon produced a kinescope with a hard vacuum, an indirectly heated cathode, a signal-modulation grid and electrostatic focusing. In 1933 an improved iconoscope camera tube was produced, and under his direction RCA went on to produce other improved types of camera tube, including the image iconoscope, the orthicon and image orthicon and the vidicon. The secondary-emission effect used in many of these tubes was also used in a scintillation radiation counter. In 1941 he was responsible for the development of the first industrial electron microscope, but for most of the Second World War he directed work concerned with radar, aircraft fire-control and TV-guided missiles.
    After the war he worked for a time on high-speed memories and medical electronics, becoming Vice-President and Technical Consultant in 1947. He "retired" from RCA and was made an honorary vice-president in 1954, but he retained an office and continued to work there almost up until his death; he also served as Director of the Rockefeller Institute for Medical Research from 1954 until 1962.
    [br]
    Principal Honours and Distinctions
    Zworykin received some twenty-seven awards and honours for his contributions to television engineering and medical electronics, including the Institution of Electrical Engineers Faraday Medal 1965; US Medal of Science 1966; and the US National Hall of Fame 1977.
    Bibliography
    29 December 1923, US patent no. 2,141, 059 (the original iconoscope patent; finally granted in December 1938!).
    13 July 1925, US patent no. 1,691, 324 (colour television system).
    1930, with D.E.Wilson, Photocells and Their Applications, New York: Wiley. 1934, "The iconoscope. A modern version of the electric eye". Proceedings of the
    Institute of Radio Engineers 22:16.
    1946, Electron Optics and the Electron Microscope.
    1940, with G.A.Morton, Television; revised 1954.
    Further Reading
    J.H.Udelson, 1982, The Great Television Race: History of the Television Industry 1925– 41: University of Alabama Press.
    KF

    Biographical history of technology > Zworykin, Vladimir Kosma

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