FR2434407B1 - - Google Patents

Info

Publication number
FR2434407B1
FR2434407B1 FR7915606A FR7915606A FR2434407B1 FR 2434407 B1 FR2434407 B1 FR 2434407B1 FR 7915606 A FR7915606 A FR 7915606A FR 7915606 A FR7915606 A FR 7915606A FR 2434407 B1 FR2434407 B1 FR 2434407B1
Authority
FR
France
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
FR7915606A
Other languages
French (fr)
Other versions
FR2434407A1 (fr
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.)
Novartis AG
Original Assignee
Ciba Geigy AG
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 Ciba Geigy AG filed Critical Ciba Geigy AG
Publication of FR2434407A1 publication Critical patent/FR2434407A1/fr
Application granted granted Critical
Publication of FR2434407B1 publication Critical patent/FR2434407B1/fr
Granted 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
    • G03B27/727—Optical projection devices wherein the contrast is controlled optically (e.g. uniform exposure, two colour exposure on variable contrast sensitive material)
    • 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
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/54—Lamp housings; Illuminating means
    • G03B27/545—Lamp housings; Illuminating means for enlargers
    • G03B27/547—Lamp housings; Illuminating means for enlargers colour mixing heads

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Projection-Type Copiers In General (AREA)
  • Control Of Exposure In Printing And Copying (AREA)
FR7915606A 1978-06-19 1979-06-18 Lanterne d'eclairage pour obtention d'epreuves sur papier photographiques Granted FR2434407A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7827327 1978-06-19
GB7833369 1978-08-15

Publications (2)

Publication Number Publication Date
FR2434407A1 FR2434407A1 (fr) 1980-03-21
FR2434407B1 true FR2434407B1 (enrdf_load_stackoverflow) 1982-05-14

Family

ID=26268009

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7915606A Granted FR2434407A1 (fr) 1978-06-19 1979-06-18 Lanterne d'eclairage pour obtention d'epreuves sur papier photographiques

Country Status (2)

Country Link
DE (1) DE2924531A1 (enrdf_load_stackoverflow)
FR (1) FR2434407A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4368974A (en) 1980-05-02 1983-01-18 Ciba-Geigy Ag Illuminating system for producing prints on variable contrast photosensitive material, filter strip for said system and lamphouse comprising the same

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0612402B2 (ja) * 1985-11-05 1994-02-16 コニカ株式会社 カラー複写機
JPS62254137A (ja) * 1986-04-28 1987-11-05 Oak Seisakusho:Kk 平行光移動型露光装置
DE3740103A1 (de) * 1987-11-26 1989-06-08 Stein Ritter Von Werner Verfahren zur steuerung der belichtung in hochleistungsprintern
US4964696A (en) * 1988-01-12 1990-10-23 Asahi Kogaku Kogyo Kabushiki Kaisha Color separating optical apparatus
DE29503904U1 (de) * 1995-02-23 1995-06-22 Dunco-Fotogerätebau Georg Schüler GmbH + Co, 13509 Berlin Filtergerät für in der Fototechnik eingesetzte Vergrößerungsgeräte

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE896454C (de) * 1951-12-23 1953-11-12 Agfa Camera Werk Ag Vorrichtung zum Ausgleich von Farbverfaelschungen beim Kopieren oder Vergroessern von Farbnegativen
DE1077965B (de) * 1956-11-02 1960-03-17 Meopta Narodni Podnik Vorrichtung zur Regelung des Lichtes beim Kopieren oder Vergroessern von Mehrfarbenbildern
DE1183357B (de) * 1957-09-23 1964-12-10 Gevaert Photo Prod Nv Vorrichtung zur Erzeugung von Farbbildern durch Kopieren oder Vergroessern von Farbfilmen
US3374706A (en) * 1965-06-01 1968-03-26 Simmon Brothers Inc Variable contrast light source for condenser enlargers
US3469914A (en) * 1966-11-04 1969-09-30 Charles Leslie Thomson Enlarger head for use with variable contrast paper
DE1279443B (de) * 1967-08-24 1968-10-03 Klimsch & Co Verfahren zur Gradationsregelung bei photographischen Reproduktionen und Vergroesserungen und Vorrichtung zu seiner Durchfuehrung
GB1218017A (en) * 1967-11-22 1971-01-06 Pavelle Ltd Method of photographic colour printing
DE2119871B2 (de) * 1971-04-23 1976-03-25 Meteor-Siegen Apparatebau Paul Schmeck Gmbh, 5900 Siegen Lichtpausmaschine mit einer messstation zur messung der transparenz eines originals
DE2356277C3 (de) * 1973-11-10 1979-02-01 Agfa-Gevaert Ag, 5090 Leverkusen Verfahren zur Ermittlung der Belichtungsdauer eines fotografischen Kopiermaterials und Vorrichtung zur Durchfuhrung des Verfahrens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4368974A (en) 1980-05-02 1983-01-18 Ciba-Geigy Ag Illuminating system for producing prints on variable contrast photosensitive material, filter strip for said system and lamphouse comprising the same

Also Published As

Publication number Publication date
DE2924531A1 (de) 1980-01-03
FR2434407A1 (fr) 1980-03-21
DE2924531C2 (enrdf_load_stackoverflow) 1989-07-20

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse