JPS5470825A - Automatic strobo device - Google Patents

Automatic strobo device

Info

Publication number
JPS5470825A
JPS5470825A JP13736077A JP13736077A JPS5470825A JP S5470825 A JPS5470825 A JP S5470825A JP 13736077 A JP13736077 A JP 13736077A JP 13736077 A JP13736077 A JP 13736077A JP S5470825 A JPS5470825 A JP S5470825A
Authority
JP
Japan
Prior art keywords
flash
integrating
trigger
circuit
flash illumination
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
JP13736077A
Other languages
Japanese (ja)
Inventor
Saburo Numata
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.)
Fujinon Corp
Original Assignee
Fuji Photo Optical 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 Fuji Photo Optical Co Ltd filed Critical Fuji Photo Optical Co Ltd
Priority to JP13736077A priority Critical patent/JPS5470825A/en
Publication of JPS5470825A publication Critical patent/JPS5470825A/en
Pending legal-status Critical Current

Links

Landscapes

  • Stroboscope Apparatuses (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

PURPOSE:To control the flash illumination accurately without any influence from the noises upon trigger of a flash bulb by integrating the reflected light from a object so that the start of an integrating element for stopping the flash illumination may be delayed a preset time through a delay circut. CONSTITUTION:When a switch Sx is turned on after the charge of a main capacitor 3 is finished, a flash bulb 5 is made to emit a light by a trigger circuit 4, and the operation of a boosting circuit 1 is stopped through a mono-stable multivibrator 14. Then, a MOS FET 8 is rendered condictive after elapse of the delay time which id determined by a delay circuit 7. As a reslut, an operational amplifier 11 for integrating the photometric signals makes the flash bulb 5 emit the flash light in response to the trigger signals of the circuit 4 so that the integrating operations are started after elapse of the preset time thereby to control the interruption of the flash illumination. As a result, integrating amplifiers 11 and 12 can be free from the influences of the noises and drifts during the trigger of the flash illumination so that the flash illumination of accurate light quantity be accomplished.
JP13736077A 1977-11-16 1977-11-16 Automatic strobo device Pending JPS5470825A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13736077A JPS5470825A (en) 1977-11-16 1977-11-16 Automatic strobo device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13736077A JPS5470825A (en) 1977-11-16 1977-11-16 Automatic strobo device

Publications (1)

Publication Number Publication Date
JPS5470825A true JPS5470825A (en) 1979-06-07

Family

ID=15196833

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13736077A Pending JPS5470825A (en) 1977-11-16 1977-11-16 Automatic strobo device

Country Status (1)

Country Link
JP (1) JPS5470825A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS566223A (en) * 1979-06-25 1981-01-22 Polaroid Corp Optical amount integrator
JPS56117222A (en) * 1980-02-21 1981-09-14 Olympus Optical Co Ltd Automatic exposure control circuit
JPS58186729A (en) * 1982-04-26 1983-10-31 Sanpack:Kk Automatic stroboscope
JPS5978324A (en) * 1982-10-27 1984-05-07 Olympus Optical Co Ltd Stroboscopic light emission controller of electronic camera using solid-state image pickup element
JPS60112230U (en) * 1983-12-31 1985-07-30 株式会社リコー Auto-adjustable flash device
JPS6219636U (en) * 1985-07-19 1987-02-05
JPS63220122A (en) * 1987-03-09 1988-09-13 Tokyo Keiki Co Ltd Method and device for controlling light emission timing
JPS63187129U (en) * 1988-04-12 1988-11-30
JPH01152329U (en) * 1988-03-31 1989-10-20
US5138361A (en) * 1988-03-31 1992-08-11 Asahi Kogaku Kogyo K.K. Electronic flash control device employing a plurality of control signals

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4844969U (en) * 1971-09-29 1973-06-12
US3769546A (en) * 1972-05-17 1973-10-30 W Pecher Electronic flash device
JPS5248832B2 (en) * 1973-10-23 1977-12-13

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4844969U (en) * 1971-09-29 1973-06-12
US3769546A (en) * 1972-05-17 1973-10-30 W Pecher Electronic flash device
JPS5248832B2 (en) * 1973-10-23 1977-12-13

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS566223A (en) * 1979-06-25 1981-01-22 Polaroid Corp Optical amount integrator
JPS56117222A (en) * 1980-02-21 1981-09-14 Olympus Optical Co Ltd Automatic exposure control circuit
JPS58186729A (en) * 1982-04-26 1983-10-31 Sanpack:Kk Automatic stroboscope
JPS5978324A (en) * 1982-10-27 1984-05-07 Olympus Optical Co Ltd Stroboscopic light emission controller of electronic camera using solid-state image pickup element
JPS60112230U (en) * 1983-12-31 1985-07-30 株式会社リコー Auto-adjustable flash device
JPS6219636U (en) * 1985-07-19 1987-02-05
JPS63220122A (en) * 1987-03-09 1988-09-13 Tokyo Keiki Co Ltd Method and device for controlling light emission timing
JPH01152329U (en) * 1988-03-31 1989-10-20
US5138361A (en) * 1988-03-31 1992-08-11 Asahi Kogaku Kogyo K.K. Electronic flash control device employing a plurality of control signals
USRE35196E (en) * 1988-03-31 1996-04-02 Asahi Kogaku Kogyo Kabushiki Kaisha Electronic flash control device employing a plurality of control signals
JPS63187129U (en) * 1988-04-12 1988-11-30

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