GB1317607A - Method and apparatus of controlling exposure times in photographic printers - Google Patents

Method and apparatus of controlling exposure times in photographic printers

Info

Publication number
GB1317607A
GB1317607A GB2897870A GB2897870A GB1317607A GB 1317607 A GB1317607 A GB 1317607A GB 2897870 A GB2897870 A GB 2897870A GB 2897870 A GB2897870 A GB 2897870A GB 1317607 A GB1317607 A GB 1317607A
Authority
GB
United Kingdom
Prior art keywords
potentiometer
original
signal
exposure
rheostat
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
GB2897870A
Other languages
English (en)
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
Priority claimed from CH915769A external-priority patent/CH515524A/de
Application filed by Ciba Geigy AG filed Critical Ciba Geigy AG
Publication of GB1317607A publication Critical patent/GB1317607A/en
Expired 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
    • G03B27/80—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus in dependence upon automatic analysis of the original

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Control Of Exposure In Printing And Copying (AREA)
  • Projection-Type Copiers In General (AREA)
GB2897870A 1969-06-16 1970-06-15 Method and apparatus of controlling exposure times in photographic printers Expired GB1317607A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH915769A CH515524A (de) 1969-06-16 1969-06-16 Verfahren und Vorrichtung zur Belichtungssteuerung eines photographischen Kopiergerätes
CH621470A CH523518A (de) 1969-06-16 1970-04-24 Verfahren und Vorrichtung zur Belichtungssteuerung eines photographischen Kopiergerätes

Publications (1)

Publication Number Publication Date
GB1317607A true GB1317607A (en) 1973-05-23

Family

ID=25699185

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2897870A Expired GB1317607A (en) 1969-06-16 1970-06-15 Method and apparatus of controlling exposure times in photographic printers

Country Status (6)

Country Link
JP (1) JPS5137010B1 (enrdf_load_stackoverflow)
CH (1) CH523518A (enrdf_load_stackoverflow)
DE (1) DE2029758C3 (enrdf_load_stackoverflow)
FR (1) FR2052587A5 (enrdf_load_stackoverflow)
GB (1) GB1317607A (enrdf_load_stackoverflow)
SE (1) SE350855B (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH627288A5 (enrdf_load_stackoverflow) * 1977-03-11 1981-12-31 Gretag Ag
JPS5756836A (en) * 1980-09-22 1982-04-05 Dainippon Screen Mfg Co Ltd Method and device for correcting anti-reciprocity law in case of color reproduction

Also Published As

Publication number Publication date
CH523518A (de) 1972-05-31
DE2029758C3 (de) 1978-08-17
DE2029758B2 (de) 1977-12-15
DE2029758A1 (enrdf_load_stackoverflow) 1970-12-23
SE350855B (enrdf_load_stackoverflow) 1972-11-06
FR2052587A5 (enrdf_load_stackoverflow) 1971-04-09
JPS5137010B1 (enrdf_load_stackoverflow) 1976-10-13

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee