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JPS54155054A - Detector - Google Patents

Detector

Info

Publication number
JPS54155054A
JPS54155054A JP6362678A JP6362678A JPS54155054A JP S54155054 A JPS54155054 A JP S54155054A JP 6362678 A JP6362678 A JP 6362678A JP 6362678 A JP6362678 A JP 6362678A JP S54155054 A JPS54155054 A JP S54155054A
Authority
JP
Japan
Prior art keywords
detected
voltage
light amount
existence
article
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
JP6362678A
Other languages
Japanese (ja)
Inventor
Kyoji Komi
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 JP6362678A priority Critical patent/JPS54155054A/en
Publication of JPS54155054A publication Critical patent/JPS54155054A/en
Pending legal-status Critical Current

Links

Landscapes

  • Paper Feeding For Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Controlling Sheets Or Webs (AREA)

Abstract

PURPOSE: To detect the existence of an article to be detected in a simple configuration by utilizing the difference between regularly reflected light amount and randomly reflected light amount in response to the existence of the article to be detected.
CONSTITUTION: Light emitting diodes 9, 10 emit lights in response to negative or positive outputs of an oscillator 12. Received light detected voltage of a phototransistor 11 becomes superimosed voltage of a rectangular wave responsive to the oscillated output of an oscillator 12 and a DC component via a directivity of the light of the smooth surface of a photosensitive drum and is detected through an HPP formed with capacitors C2, C3 and resistors R8, R9 and operational amplifier A2 by a detecting circuit composed of a diode D1, capacitor C4 and resistors R10, R11 to thereby become low level DC voltage less than standard voltage. When paper or the like exists on the photosensitive drum, different lights of regularly reflected light amount and scattred light amount of lights emitted from diodes 9, 10 are received at the phototransistor 11. Thus, high level DC voltage detected by the detecting circuit is compared by an operational amplifier A3 applied with a stnadard voltage thereto to thereby exactly detect the existence of the article such as paper or the like to be detected by the compared output from the amplifier A3 in a simple configuration.
COPYRIGHT: (C)1979,JPO&Japio
JP6362678A 1978-05-27 1978-05-27 Detector Pending JPS54155054A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6362678A JPS54155054A (en) 1978-05-27 1978-05-27 Detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6362678A JPS54155054A (en) 1978-05-27 1978-05-27 Detector

Publications (1)

Publication Number Publication Date
JPS54155054A true JPS54155054A (en) 1979-12-06

Family

ID=13234726

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6362678A Pending JPS54155054A (en) 1978-05-27 1978-05-27 Detector

Country Status (1)

Country Link
JP (1) JPS54155054A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56164354A (en) * 1980-05-22 1981-12-17 Fuji Xerox Co Ltd Image density detector of electrophotographic copying machine
JPS5875160A (en) * 1981-10-30 1983-05-06 Konishiroku Photo Ind Co Ltd Electrostatic recorder
JPS60162267A (en) * 1984-02-02 1985-08-24 Konishiroku Photo Ind Co Ltd Electrostatic recording device
JPS62146852A (en) * 1985-12-18 1987-06-30 Omron Tateisi Electronics Co Reflective photo-sensor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4974972A (en) * 1972-10-16 1974-07-19

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4974972A (en) * 1972-10-16 1974-07-19

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56164354A (en) * 1980-05-22 1981-12-17 Fuji Xerox Co Ltd Image density detector of electrophotographic copying machine
JPS5875160A (en) * 1981-10-30 1983-05-06 Konishiroku Photo Ind Co Ltd Electrostatic recorder
JPS60162267A (en) * 1984-02-02 1985-08-24 Konishiroku Photo Ind Co Ltd Electrostatic recording device
JPH0437989B2 (en) * 1984-02-02 1992-06-23 Konishiroku Photo Ind
JPS62146852A (en) * 1985-12-18 1987-06-30 Omron Tateisi Electronics Co Reflective photo-sensor

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