JPS5047612A - - Google Patents

Info

Publication number
JPS5047612A
JPS5047612A JP47076567A JP7656772A JPS5047612A JP S5047612 A JPS5047612 A JP S5047612A JP 47076567 A JP47076567 A JP 47076567A JP 7656772 A JP7656772 A JP 7656772A JP S5047612 A JPS5047612 A JP S5047612A
Authority
JP
Japan
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.)
Pending
Application number
JP47076567A
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 filed Critical
Publication of JPS5047612A publication Critical patent/JPS5047612A/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28—Modifications for introducing a time delay before switching
    • H03K17/292—Modifications for introducing a time delay before switching in thyristor, unijunction transistor or programmable unijunction transistor switches
    • 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
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/03—Combinations of cameras with lighting apparatus; Flash units
    • G03B15/04—Combinations of cameras with non-electronic flash apparatus; Non-electronic flash units
    • 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
    • G03B27/02—Exposure apparatus for contact printing
    • G03B27/14—Details
    • G03B27/16—Illumination arrangements, e.g. positioning of lamps, positioning of reflectors
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Control Of Exposure In Printing And Copying (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Electronic Switches (AREA)
JP47076567A 1970-07-15 1972-08-01 Pending JPS5047612A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5504970A 1970-07-15 1970-07-15

Publications (1)

Publication Number Publication Date
JPS5047612A true JPS5047612A (ja) 1975-04-28

Family

ID=21995235

Family Applications (1)

Application Number Title Priority Date Filing Date
JP47076567A Pending JPS5047612A (ja) 1970-07-15 1972-08-01

Country Status (3)

Country Link
US (1) US3672767A (ja)
JP (1) JPS5047612A (ja)
GB (1) GB1361021A (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985440A (en) * 1972-03-01 1976-10-12 Hoechst Aktiengesellschaft Process and apparatus for automatic exposure time control in copying devices
US3828226A (en) * 1972-12-20 1974-08-06 Carlson Co Chesley F Exposure override control
US3832054A (en) * 1973-06-06 1974-08-27 Sable Photo Works Photographic print timer
US3989374A (en) * 1975-06-23 1976-11-02 Latka Henry C Electronic timing device
US4498140A (en) * 1982-06-02 1985-02-05 Chesley F. Carlson Automated self calibrating exposure computer

Also Published As

Publication number Publication date
US3672767A (en) 1972-06-27
DE2135017B2 (de) 1975-11-27
GB1361021A (en) 1974-07-24
DE2135017A1 (de) 1972-04-27

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