JPS57181565A - Scanning position detector - Google Patents

Scanning position detector

Info

Publication number
JPS57181565A
JPS57181565A JP6556781A JP6556781A JPS57181565A JP S57181565 A JPS57181565 A JP S57181565A JP 6556781 A JP6556781 A JP 6556781A JP 6556781 A JP6556781 A JP 6556781A JP S57181565 A JPS57181565 A JP S57181565A
Authority
JP
Japan
Prior art keywords
image scanning
carriage
plate
counter
accurately
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
JP6556781A
Other languages
Japanese (ja)
Inventor
Narimoto Tenmiyo
Hiroshi Koide
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 JP6556781A priority Critical patent/JPS57181565A/en
Publication of JPS57181565A publication Critical patent/JPS57181565A/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 detect the scanning positions of an image scanning system accurately by determining the position of a carriage which carries an image scanning mirror with a certain fixed point as a basic point. CONSTITUTION:A light shielding plate 17 is secured to a carriage 16 which is secured with a mirror 6. A position detecting means is constituted of said plate 17 and a photosensor 18 provided in the position A. A counter CO1 is held cleared while the sensor 18 detects the plate 17. When the plate 17 deviates from the detecting visual field of the sensor 18 and the movement of the carriage 16 is toward the image scanning direction, the counter CO1 counts up the synchronizing pulses from a rotary encoder 15, and if it is in the resetting direction, the counter counts down the same. As a result, the count code indicates the carriage position in the image scanning direction accurately with the initial position as a basic point. In this way, the scanning position of the image scanning system is detected accurately.
JP6556781A 1981-04-30 1981-04-30 Scanning position detector Pending JPS57181565A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6556781A JPS57181565A (en) 1981-04-30 1981-04-30 Scanning position detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6556781A JPS57181565A (en) 1981-04-30 1981-04-30 Scanning position detector

Publications (1)

Publication Number Publication Date
JPS57181565A true JPS57181565A (en) 1982-11-09

Family

ID=13290712

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6556781A Pending JPS57181565A (en) 1981-04-30 1981-04-30 Scanning position detector

Country Status (1)

Country Link
JP (1) JPS57181565A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS626279A (en) * 1985-07-02 1987-01-13 Konishiroku Photo Ind Co Ltd Exposure device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS626279A (en) * 1985-07-02 1987-01-13 Konishiroku Photo Ind Co Ltd Exposure device

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