JPS575060A - Timing control system of film overlay mechanism - Google Patents

Timing control system of film overlay mechanism

Info

Publication number
JPS575060A
JPS575060A JP1804280A JP1804280A JPS575060A JP S575060 A JPS575060 A JP S575060A JP 1804280 A JP1804280 A JP 1804280A JP 1804280 A JP1804280 A JP 1804280A JP S575060 A JPS575060 A JP S575060A
Authority
JP
Japan
Prior art keywords
film
signal
generation
pulse
signals
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.)
Pending
Application number
JP1804280A
Other languages
Japanese (ja)
Inventor
Takanobu Yasukake
Kazuo Sakaki
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.)
Koki Holdings Co Ltd
Original Assignee
Hitachi Koki Co Ltd
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 Hitachi Koki Co Ltd filed Critical Hitachi Koki Co Ltd
Priority to JP1804280A priority Critical patent/JPS575060A/en
Publication of JPS575060A publication Critical patent/JPS575060A/en
Pending 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
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Variable Magnification In Projection-Type Copying Machines (AREA)

Abstract

PURPOSE:To ensure an accurate control for on-and-off of a light source regardless of some flaws, by providing >=2 light transmitting parts on a rotary film and checking both the width and the interval of generation of the signals produced by the light transmitting parts to prevent a generation of the corresponding signal. CONSTITUTION:Only the signal that is generated from a normal light transmitting part 13 on a film is extracted from the output signals of a sensor formed by a combination of a light emitting element 14 and a photodetector 15. Then the signals generated by the flaws on a film are cut, and the above-mentioned extracted signal is used for the timing signal for on-and-off of a light source. In such case, N units of the same parts 13 are provided on a film, and both the pulse duration and the interval of pulse generation are checked for the output signal of the sensor. And if the pulse duration and the interval of pulse generation are within the prescribed value respectively for N units of signals, the N-th pulse is extracted.
JP1804280A 1980-02-15 1980-02-15 Timing control system of film overlay mechanism Pending JPS575060A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1804280A JPS575060A (en) 1980-02-15 1980-02-15 Timing control system of film overlay mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1804280A JPS575060A (en) 1980-02-15 1980-02-15 Timing control system of film overlay mechanism

Publications (1)

Publication Number Publication Date
JPS575060A true JPS575060A (en) 1982-01-11

Family

ID=11960619

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1804280A Pending JPS575060A (en) 1980-02-15 1980-02-15 Timing control system of film overlay mechanism

Country Status (1)

Country Link
JP (1) JPS575060A (en)

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