JPS60247263A - Original density reader - Google Patents

Original density reader

Info

Publication number
JPS60247263A
JPS60247263A JP59264941A JP26494184A JPS60247263A JP S60247263 A JPS60247263 A JP S60247263A JP 59264941 A JP59264941 A JP 59264941A JP 26494184 A JP26494184 A JP 26494184A JP S60247263 A JPS60247263 A JP S60247263A
Authority
JP
Japan
Prior art keywords
original
light
read
dark
mirror
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
JP59264941A
Other languages
Japanese (ja)
Inventor
Susumu Sugiura
Seiji Saito
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 JP59264941A priority Critical patent/JPS60247263A/en
Publication of JPS60247263A publication Critical patent/JPS60247263A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/50Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5025Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the original characteristics, e.g. contrast, density

Abstract

PURPOSE:To read exactly the density of an original with simple constitution by constituting integrally a light emitting means, photodetecting means and control means and making these means manually movable. CONSTITUTION:A light source 51 lights up when an operator directs the tip 21' of a light pen toward the bright part of the original 23 and pushes a read switch 58 for the image density of the bright part. The light thereof irradiates the original 23 through a condenser lens 52, a half mirror 53 and a lens system 54. The reflected light is reflected by the mirror 53 and is made incident through a mirror 55 and an aperture 56 to a photodetector 56. The output thereof is inputted via an amplifier, multiplexer and analog-to-digital converter to a processing circuit (control means), by which the original density is read. The image density in the dark part is similarly read when the operator directs similarly the pen 21 toward the dark part of the original and lights the light source 51 by pushing a read switch 59 for the image in the dark part.
JP59264941A 1984-12-14 1984-12-14 Original density reader Pending JPS60247263A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59264941A JPS60247263A (en) 1984-12-14 1984-12-14 Original density reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59264941A JPS60247263A (en) 1984-12-14 1984-12-14 Original density reader

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP15098877A Division JPS5483437A (en) 1977-12-15 1977-12-15 Electrophotographic copying apparatus

Publications (1)

Publication Number Publication Date
JPS60247263A true JPS60247263A (en) 1985-12-06

Family

ID=17410308

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59264941A Pending JPS60247263A (en) 1984-12-14 1984-12-14 Original density reader

Country Status (1)

Country Link
JP (1) JPS60247263A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62177685A (en) * 1986-01-30 1987-08-04 Nec Corp Optical information reader

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5183720A (en) * 1975-01-20 1976-07-22 Nippon Telegraph & Telephone

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5183720A (en) * 1975-01-20 1976-07-22 Nippon Telegraph & Telephone

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62177685A (en) * 1986-01-30 1987-08-04 Nec Corp Optical information reader

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