JPS5545050A - Light source device for image exposure - Google Patents

Light source device for image exposure

Info

Publication number
JPS5545050A
JPS5545050A JP11854978A JP11854978A JPS5545050A JP S5545050 A JPS5545050 A JP S5545050A JP 11854978 A JP11854978 A JP 11854978A JP 11854978 A JP11854978 A JP 11854978A JP S5545050 A JPS5545050 A JP S5545050A
Authority
JP
Japan
Prior art keywords
circuit
light source
control signal
light
reference voltage
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
JP11854978A
Other languages
Japanese (ja)
Inventor
Masaharu Nishikawa
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.)
Olympus Corp
Original Assignee
Olympus 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP11854978A priority Critical patent/JPS5545050A/en
Publication of JPS5545050A publication Critical patent/JPS5545050A/en
Pending legal-status Critical Current

Links

Landscapes

  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)

Abstract

PURPOSE:To let light be emitted at a desired quantity of light by providing the control circuit which measures the quantity of emitted light of a light source and generates the required quantity of emitted light and making possible manual changing of the magnitude of the control signal of this circuit from the outside. CONSTITUTION:A power source 10 is connected via dimming type lighting circuit 11 to a light source 12. The circuit 11 is operated by the control signal of a control signal circuit 13, the control signal whereof is generated through comparison of the output of a photo detector 14 which detects the brightness of the light source 12 and the reference voltage having been set in a reference voltage circuit 15. Hence, then the light of the light source 12 varies, the circuit 15 maintains the specified set reference voltage value and therefore the control signal from the circuit 13 corrects the fluctuations by way of the dimming type lighting circuit 11, thereby stabilizing the lightness of the light source 12. The magnitude of the control signal may be manually changed from the outside by an adjusting means 16 on the input or output side of the circuit 13, by which the brightness of the light source 12 is changed and when it reaches the desired value, the control cycle of the entire part stabilizes.
JP11854978A 1978-09-28 1978-09-28 Light source device for image exposure Pending JPS5545050A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11854978A JPS5545050A (en) 1978-09-28 1978-09-28 Light source device for image exposure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11854978A JPS5545050A (en) 1978-09-28 1978-09-28 Light source device for image exposure

Publications (1)

Publication Number Publication Date
JPS5545050A true JPS5545050A (en) 1980-03-29

Family

ID=14739326

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11854978A Pending JPS5545050A (en) 1978-09-28 1978-09-28 Light source device for image exposure

Country Status (1)

Country Link
JP (1) JPS5545050A (en)

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