JPS52156633A - Enlarging optical device - Google Patents

Enlarging optical device

Info

Publication number
JPS52156633A
JPS52156633A JP7373676A JP7373676A JPS52156633A JP S52156633 A JPS52156633 A JP S52156633A JP 7373676 A JP7373676 A JP 7373676A JP 7373676 A JP7373676 A JP 7373676A JP S52156633 A JPS52156633 A JP S52156633A
Authority
JP
Japan
Prior art keywords
optical device
enlarging optical
photosensitive member
enlarging
image
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
JP7373676A
Other languages
Japanese (ja)
Other versions
JPS5820427B2 (en
Inventor
Masa Sato
Akiyoshi Torikai
Hidetoshi Tanaka
Toshiro Kasamura
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP51073736A priority Critical patent/JPS5820427B2/en
Publication of JPS52156633A publication Critical patent/JPS52156633A/en
Publication of JPS5820427B2 publication Critical patent/JPS5820427B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Variable Magnification In Projection-Type Copying Machines (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)

Abstract

PURPOSE:To maintain the irradiation light quantity to photosensitive member of a device, which is operative to expose the photosensitive member by enlarging and reducing the size of an original image, at a constant level to automatically adjust the density of the image for the enlarged copying operation by turning an iris control member in accordance with the movement of a lens.
JP51073736A 1976-06-22 1976-06-22 variable magnification optical device Expired JPS5820427B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP51073736A JPS5820427B2 (en) 1976-06-22 1976-06-22 variable magnification optical device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP51073736A JPS5820427B2 (en) 1976-06-22 1976-06-22 variable magnification optical device

Publications (2)

Publication Number Publication Date
JPS52156633A true JPS52156633A (en) 1977-12-27
JPS5820427B2 JPS5820427B2 (en) 1983-04-22

Family

ID=13526807

Family Applications (1)

Application Number Title Priority Date Filing Date
JP51073736A Expired JPS5820427B2 (en) 1976-06-22 1976-06-22 variable magnification optical device

Country Status (1)

Country Link
JP (1) JPS5820427B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891475A (en) * 1981-11-27 1983-05-31 Canon Inc Picture forming device
JPS59148042A (en) * 1983-02-15 1984-08-24 Ushio Inc Method and device for correcting illuminance of projection image
JPS59166236U (en) * 1983-04-20 1984-11-07 ミノルタ株式会社 Light distribution correction device
JPS60134226A (en) * 1983-12-23 1985-07-17 Asahi Optical Co Ltd Control device for exposure of slit exposing type variable power copying machine
JPS61110129A (en) * 1984-11-02 1986-05-28 Ricoh Co Ltd Illuminance correcting device of variable magnification copying machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4918539U (en) * 1972-05-19 1974-02-16
JPS4969326A (en) * 1972-11-08 1974-07-04
JPS49123027A (en) * 1973-03-27 1974-11-25

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4918539U (en) * 1972-05-19 1974-02-16
JPS4969326A (en) * 1972-11-08 1974-07-04
JPS49123027A (en) * 1973-03-27 1974-11-25

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891475A (en) * 1981-11-27 1983-05-31 Canon Inc Picture forming device
JPS6248818B2 (en) * 1981-11-27 1987-10-15 Canon Kk
JPS59148042A (en) * 1983-02-15 1984-08-24 Ushio Inc Method and device for correcting illuminance of projection image
JPS59166236U (en) * 1983-04-20 1984-11-07 ミノルタ株式会社 Light distribution correction device
JPH0443859Y2 (en) * 1983-04-20 1992-10-16
JPS60134226A (en) * 1983-12-23 1985-07-17 Asahi Optical Co Ltd Control device for exposure of slit exposing type variable power copying machine
JPS61110129A (en) * 1984-11-02 1986-05-28 Ricoh Co Ltd Illuminance correcting device of variable magnification copying machine

Also Published As

Publication number Publication date
JPS5820427B2 (en) 1983-04-22

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