FR2434407A1 - Lanterne d'eclairage pour obtention d'epreuves sur papier photographiques - Google Patents

Lanterne d'eclairage pour obtention d'epreuves sur papier photographiques

Info

Publication number
FR2434407A1
FR2434407A1 FR7915606A FR7915606A FR2434407A1 FR 2434407 A1 FR2434407 A1 FR 2434407A1 FR 7915606 A FR7915606 A FR 7915606A FR 7915606 A FR7915606 A FR 7915606A FR 2434407 A1 FR2434407 A1 FR 2434407A1
Authority
FR
France
Prior art keywords
filter
light
plate
wavebands
lamphouse
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.)
Granted
Application number
FR7915606A
Other languages
English (en)
Other versions
FR2434407B1 (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)

Abstract

La lanterne pour tirage d'épreuves sur un matériau photographique comprend une source lumineuse 1, une plaque fixe 2 à ouverture et un filtre composite mobile 4 dont une partie laisse passer la lumière dans l'une des deux bandes d'ondes s'excluant mutuellement et dont l'autre partie laisse passer la lumière dans l'autre bande d'ondes et, enfin, des moyens 8 d'atténuation de lumière réduisant la quantité de lumière transmise dans l'une des bandes pour laquelle la combinaison source-matériau photosensible est la plus sensible.
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 true FR2434407A1 (fr) 1980-03-21
FR2434407B1 FR2434407B1 (fr) 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 (fr)
FR (1) FR2434407A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3116858A1 (de) 1980-05-02 1982-01-28 CIBA-GEIGY AG, 4002 Basel Beleuchtungssystem fuer die herstellung von abzuegen auf lichtempfindlichem material mit veraenderlichem kontrast, darin verwendbarer filterstreifen, sowie diese enthaltendes lampenhaus
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1077965B (de) * 1956-11-02 1960-03-17 Meopta Narodni Podnik Vorrichtung zur Regelung des Lichtes beim Kopieren oder Vergroessern von Mehrfarbenbildern
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
GB1218017A (en) * 1967-11-22 1971-01-06 Pavelle Ltd Method of photographic colour printing
GB1223478A (en) * 1967-08-24 1971-02-24 Klimsch & Co Light source for photographic reproduction processes

Family Cites Families (4)

* 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
DE1183357B (de) * 1957-09-23 1964-12-10 Gevaert Photo Prod Nv Vorrichtung zur Erzeugung von Farbbildern durch Kopieren oder Vergroessern von Farbfilmen
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1077965B (de) * 1956-11-02 1960-03-17 Meopta Narodni Podnik Vorrichtung zur Regelung des Lichtes beim Kopieren oder Vergroessern von Mehrfarbenbildern
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
GB1223478A (en) * 1967-08-24 1971-02-24 Klimsch & Co Light source for photographic reproduction processes
GB1218017A (en) * 1967-11-22 1971-01-06 Pavelle Ltd Method of photographic colour printing

Also Published As

Publication number Publication date
DE2924531C2 (fr) 1989-07-20
DE2924531A1 (de) 1980-01-03
FR2434407B1 (fr) 1982-05-14

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Legal Events

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