JPS5745567A - Exposure device - Google Patents

Exposure device

Info

Publication number
JPS5745567A
JPS5745567A JP12129880A JP12129880A JPS5745567A JP S5745567 A JPS5745567 A JP S5745567A JP 12129880 A JP12129880 A JP 12129880A JP 12129880 A JP12129880 A JP 12129880A JP S5745567 A JPS5745567 A JP S5745567A
Authority
JP
Japan
Prior art keywords
lens
imagery
diaphragm
diaphragm mechanism
potentiometer
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
JP12129880A
Other languages
Japanese (ja)
Inventor
Shiro Totsuka
Masami Emoto
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 JP12129880A priority Critical patent/JPS5745567A/en
Publication of JPS5745567A publication Critical patent/JPS5745567A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/522—Projection optics
    • G03B27/525—Projection optics for slit exposure
    • G03B27/526—Projection optics for slit exposure in which the projection optics move

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)

Abstract

PURPOSE:To make the quantity of light on an imagery plane roughly constant by disposing a diaphragm mechanism in or near an imagery lens, and changing the aperture area of the diaphragm mechanism synchronously with the scanning of the imagery lens or a mirror. CONSTITUTION:An imagery lens 11 consists of plural lenses, and a diaphragm mechanism 15 consisting of a rotary disc 15a, and plural diaphragm vanes 15b is supported in its inside by a lens support 11a. While a photoreceptor 10 is being rotated in an arrow (d) direction, a light source 12 and the lens 11 are moved in a horizontal direction, and the information of an original 9 is slit exposed. At this time, a potentiometer 21 detects the position of the support 11a, and applies the detection signal to a diaphragm control circuit 20. A potentiometer 22 detects the quantity of revolutions of a motor 16, and applies the detection signal to the circuit 20, then the control circuit 20 corrects the aperture diameter of the mchanism 15 to a proper value.
JP12129880A 1980-09-02 1980-09-02 Exposure device Pending JPS5745567A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12129880A JPS5745567A (en) 1980-09-02 1980-09-02 Exposure device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12129880A JPS5745567A (en) 1980-09-02 1980-09-02 Exposure device

Publications (1)

Publication Number Publication Date
JPS5745567A true JPS5745567A (en) 1982-03-15

Family

ID=14807791

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12129880A Pending JPS5745567A (en) 1980-09-02 1980-09-02 Exposure device

Country Status (1)

Country Link
JP (1) JPS5745567A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63149673A (en) * 1986-12-15 1988-06-22 Canon Inc micro reader printer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63149673A (en) * 1986-12-15 1988-06-22 Canon Inc micro reader printer

Similar Documents

Publication Publication Date Title
US3709602A (en) Optical path length compensation in a copier
JPH0582921B2 (en)
US3264935A (en) Self-focusing slide projector
US3848996A (en) Photocomposing apparatus
US3469914A (en) Enlarger head for use with variable contrast paper
CA2151754A1 (en) Optical Apparatus Having Lens-System Drive Device for Temperature Correction in Direction of Optical Axis
US4711569A (en) Original illumination device with an automatic illumination control
JPS5745567A (en) Exposure device
US2845841A (en) Image reversing device
GB1178833A (en) Improvements in or relating to apparatus for Composing Print
ATE102714T1 (en) APERTURE ADJUSTMENT DEVICE IN A PHOTOGRAPHIC ENLARGER OR COPIER WITH MULTIPLE LENSES WITH ADJUSTABLE APERTURE.
US3663101A (en) Microfilm viewer-printer
US3704947A (en) Micro-film camera
US5563675A (en) Special effects carrier
US1613363A (en) Light-modifying device for cameras
GB1510532A (en) Method and apparatus for detecting data on a photographic recording medium
GB1223056A (en) Optical illuminating system
US3486814A (en) Motion picture camera light control means
US4710004A (en) Image rotation system
US4269495A (en) Camera with back-up shutter and provisions for recording data in conjunction with a primary image
US3724343A (en) Analytical photographic exposure meter
JPS5522703A (en) Image element division type copier
US4894681A (en) Image reader
JPS57163257A (en) Copying device
GB1167475A (en) Improvements in and relating to Photocopiers