GB1415940A - Process and apparatus for automatic exposure time control in copying devices - Google Patents

Process and apparatus for automatic exposure time control in copying devices

Info

Publication number
GB1415940A
GB1415940A GB949473A GB949473A GB1415940A GB 1415940 A GB1415940 A GB 1415940A GB 949473 A GB949473 A GB 949473A GB 949473 A GB949473 A GB 949473A GB 1415940 A GB1415940 A GB 1415940A
Authority
GB
United Kingdom
Prior art keywords
exposure time
time control
automatic exposure
copying devices
copying
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
GB949473A
Other languages
English (en)
Inventor
W Dennhardt
H Schroter
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.)
Hoechst AG
Original Assignee
Hoechst 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 Hoechst AG filed Critical Hoechst AG
Publication of GB1415940A publication Critical patent/GB1415940A/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 Of Exposure In Printing And Copying (AREA)
  • Projection-Type Copiers In General (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
GB949473A 1972-03-01 1973-02-27 Process and apparatus for automatic exposure time control in copying devices Expired GB1415940A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722209681 DE2209681C2 (de) 1972-03-01 1972-03-01 Vorrichtung zur automatischen Steuerung der Belichtungszeit eines Kopiergerätes

Publications (1)

Publication Number Publication Date
GB1415940A true GB1415940A (en) 1975-12-03

Family

ID=5837503

Family Applications (1)

Application Number Title Priority Date Filing Date
GB949473A Expired GB1415940A (en) 1972-03-01 1973-02-27 Process and apparatus for automatic exposure time control in copying devices

Country Status (9)

Country Link
JP (1) JPS48101132A (xx)
AT (1) AT345091B (xx)
BE (1) BE795972A (xx)
DE (1) DE2209681C2 (xx)
FR (1) FR2174633A5 (xx)
GB (1) GB1415940A (xx)
IT (1) IT977524B (xx)
NL (1) NL7302273A (xx)
SE (1) SE377196B (xx)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1497371C3 (de) * 1965-03-10 1974-01-10 Agfa-Gevaert Ag, 5090 Leverkusen Verfahren zur Regelung der Belichtungszeit von Kopiergeräten
DE1522786A1 (de) * 1965-09-06 1969-10-30 Mafi Fiedler & Zimmermann Vorrichtung zur automatischen Belichtungssteuerung von fotografischen Kopier- und Vergroesserungsgeraeten

Also Published As

Publication number Publication date
SE377196B (xx) 1975-06-23
NL7302273A (xx) 1973-09-04
DE2209681C2 (de) 1982-09-02
AT345091B (de) 1978-08-25
DE2209681A1 (de) 1973-10-11
JPS48101132A (xx) 1973-12-20
FR2174633A5 (xx) 1973-10-12
IT977524B (it) 1974-09-20
ATA169973A (de) 1977-12-15
BE795972A (fr) 1973-08-27

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Legal Events

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