JPS5441576A - Method of controlling luminescent quantity of flash lamp - Google Patents

Method of controlling luminescent quantity of flash lamp

Info

Publication number
JPS5441576A
JPS5441576A JP10809477A JP10809477A JPS5441576A JP S5441576 A JPS5441576 A JP S5441576A JP 10809477 A JP10809477 A JP 10809477A JP 10809477 A JP10809477 A JP 10809477A JP S5441576 A JPS5441576 A JP S5441576A
Authority
JP
Japan
Prior art keywords
flash lamp
condenser
rectifier
comparator
power source
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
JP10809477A
Other languages
Japanese (ja)
Other versions
JPS6026278B2 (en
Inventor
Koichi Noguchi
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP10809477A priority Critical patent/JPS6026278B2/en
Publication of JPS5441576A publication Critical patent/JPS5441576A/en
Publication of JPS6026278B2 publication Critical patent/JPS6026278B2/en
Expired legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To control the luminescent quantity of a flash lamp without directly detecting the voltage of a high voltage portion for the flash lamp. CONSTITUTION:A secondary winding of a leakage transformer 2 for boosting, to which an AC power source 1 is input, is divided into N1 and N2, a flash lamp 4 is connected to N1 through a rectifier 3 and a condenser C1 while a condenser C2 is coupled with N2 through a rectifier 3', a resistance R2 and a comparator 6 are connected to the condenser C2, and a switching element 7 mounted to the primary side of the leakage transformer 2 is controlled by the output of the comparator 6 so that the charging voltage of the condenser C2 be maintained at a fixed level. A luminescent detector 9 for generating signals by detecting the luminescence of the flash lamp 4 is mounted, and the output is input to a transistor TR, thus discharging the electric charge of the condenser C2. In the figure, 5 is a trigger circuit and 8 a power source for a control circuit.
JP10809477A 1977-09-08 1977-09-08 Flash lamp light emission control method Expired JPS6026278B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10809477A JPS6026278B2 (en) 1977-09-08 1977-09-08 Flash lamp light emission control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10809477A JPS6026278B2 (en) 1977-09-08 1977-09-08 Flash lamp light emission control method

Publications (2)

Publication Number Publication Date
JPS5441576A true JPS5441576A (en) 1979-04-02
JPS6026278B2 JPS6026278B2 (en) 1985-06-22

Family

ID=14475708

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10809477A Expired JPS6026278B2 (en) 1977-09-08 1977-09-08 Flash lamp light emission control method

Country Status (1)

Country Link
JP (1) JPS6026278B2 (en)

Also Published As

Publication number Publication date
JPS6026278B2 (en) 1985-06-22

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