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JPS5559446A - Automatic light quantity controlled flash light emission device - Google Patents

Automatic light quantity controlled flash light emission device

Info

Publication number
JPS5559446A
JPS5559446A JP13224778A JP13224778A JPS5559446A JP S5559446 A JPS5559446 A JP S5559446A JP 13224778 A JP13224778 A JP 13224778A JP 13224778 A JP13224778 A JP 13224778A JP S5559446 A JPS5559446 A JP S5559446A
Authority
JP
Japan
Prior art keywords
lamp
capacitor
light quantity
commutating
light emission
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.)
Granted
Application number
JP13224778A
Other languages
Japanese (ja)
Other versions
JPS6365929B2 (en
Inventor
Yasuo Nakayama
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.)
Morris Photo Industry Co Ltd
Original Assignee
Morris Photo Industry 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 Morris Photo Industry Co Ltd filed Critical Morris Photo Industry Co Ltd
Priority to JP13224778A priority Critical patent/JPS5559446A/en
Priority to US06/087,469 priority patent/US4298826A/en
Publication of JPS5559446A publication Critical patent/JPS5559446A/en
Publication of JPS6365929B2 publication Critical patent/JPS6365929B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To eliminate the generation of unnecessary light radiation and make possible optimization of light quantity control to the subject of a short distance by flowing the current recharging a commutating capacitor to the specified route right after cutting-off of an element which controls a discharge lamp. CONSTITUTION:The discharging current of a main capacitor MC at right after the turning-off of a switching element SW1 flows so as to charge a commutating capacitor CC and a commutating charge accumulating capacitor Cd to the polarity opposite from the initial one by way of a switching element SW2 having an impedance sufficiently lower than that of a discharge lamp Xe, resulting in that no current flows to the lamp Xe at all. Hence, the light emission time of the lamp Xe coincides with the period since the element SW1 conducted and the lamp Xe started emission until the element SW2 conducts and the element SW1 is cut off, thus accurate light quantity control is made possible.
JP13224778A 1978-10-27 1978-10-27 Automatic light quantity controlled flash light emission device Granted JPS5559446A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP13224778A JPS5559446A (en) 1978-10-27 1978-10-27 Automatic light quantity controlled flash light emission device
US06/087,469 US4298826A (en) 1978-10-27 1979-10-22 Automatic flash unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13224778A JPS5559446A (en) 1978-10-27 1978-10-27 Automatic light quantity controlled flash light emission device

Publications (2)

Publication Number Publication Date
JPS5559446A true JPS5559446A (en) 1980-05-02
JPS6365929B2 JPS6365929B2 (en) 1988-12-19

Family

ID=15076799

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13224778A Granted JPS5559446A (en) 1978-10-27 1978-10-27 Automatic light quantity controlled flash light emission device

Country Status (1)

Country Link
JP (1) JPS5559446A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5738426A (en) * 1980-08-21 1982-03-03 Fuji Koeki Kk Trigger device of flash discharge light emitter
JPS57120923A (en) * 1981-01-19 1982-07-28 Fujimi Koki Kk Automatic dimming strobe light emitter
JPS61248055A (en) * 1985-04-26 1986-11-05 Toray Ind Inc Waterless lithographic printing plate

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02140726U (en) * 1989-04-28 1990-11-26
JPH0364444U (en) * 1989-10-26 1991-06-24
WO2020017514A1 (en) * 2018-07-18 2020-01-23 シチズン時計株式会社 Machine tool

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4954023A (en) * 1972-09-26 1974-05-25

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4954023A (en) * 1972-09-26 1974-05-25

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5738426A (en) * 1980-08-21 1982-03-03 Fuji Koeki Kk Trigger device of flash discharge light emitter
JPS57120923A (en) * 1981-01-19 1982-07-28 Fujimi Koki Kk Automatic dimming strobe light emitter
JPS61248055A (en) * 1985-04-26 1986-11-05 Toray Ind Inc Waterless lithographic printing plate
JPH043864B2 (en) * 1985-04-26 1992-01-24

Also Published As

Publication number Publication date
JPS6365929B2 (en) 1988-12-19

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