JPH0377475B2 - - Google Patents

Info

Publication number
JPH0377475B2
JPH0377475B2 JP57181347A JP18134782A JPH0377475B2 JP H0377475 B2 JPH0377475 B2 JP H0377475B2 JP 57181347 A JP57181347 A JP 57181347A JP 18134782 A JP18134782 A JP 18134782A JP H0377475 B2 JPH0377475 B2 JP H0377475B2
Authority
JP
Japan
Prior art keywords
light
value
output
light emitting
microcomputer
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.)
Expired - Lifetime
Application number
JP57181347A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5970990A (ja
Inventor
Mutsuo Ogawa
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 JP57181347A priority Critical patent/JPS5970990A/ja
Priority to US06/542,802 priority patent/US4605848A/en
Priority to DE19833337865 priority patent/DE3337865A1/de
Publication of JPS5970990A publication Critical patent/JPS5970990A/ja
Publication of JPH0377475B2 publication Critical patent/JPH0377475B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers
    • G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/12—Controlling the intensity of the light using optical feedback

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Electronic Switches (AREA)
JP57181347A 1982-10-18 1982-10-18 調光方法 Granted JPS5970990A (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP57181347A JPS5970990A (ja) 1982-10-18 1982-10-18 調光方法
US06/542,802 US4605848A (en) 1982-10-18 1983-10-17 Photosensor and output control therefor
DE19833337865 DE3337865A1 (de) 1982-10-18 1983-10-18 Verfahren zum steuern eines ausgangs eines photosensors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57181347A JPS5970990A (ja) 1982-10-18 1982-10-18 調光方法

Publications (2)

Publication Number Publication Date
JPS5970990A JPS5970990A (ja) 1984-04-21
JPH0377475B2 true JPH0377475B2 (US06650917-20031118-M00005.png) 1991-12-10

Family

ID=16099112

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57181347A Granted JPS5970990A (ja) 1982-10-18 1982-10-18 調光方法

Country Status (3)

Country Link
US (1) US4605848A (US06650917-20031118-M00005.png)
JP (1) JPS5970990A (US06650917-20031118-M00005.png)
DE (1) DE3337865A1 (US06650917-20031118-M00005.png)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3409818A1 (de) * 1984-03-16 1985-09-26 Siemens AG, 1000 Berlin und 8000 München Optoelektronisches abtastsystem mit automatischem abgleich
JPS61228376A (ja) * 1985-04-01 1986-10-11 Nec Corp 光学系出力電圧チェック回路
JPS62198783A (ja) * 1986-02-27 1987-09-02 Oki Electric Ind Co Ltd 光学式媒体監視方式
US4684801A (en) * 1986-02-28 1987-08-04 Carroll Touch Inc. Signal preconditioning for touch entry device
US4769532A (en) * 1986-07-11 1988-09-06 Laurel Bank Machines Co., Ltd. Apparatus for adjusting optical sensors with threshold memory
US4740686A (en) * 1986-09-09 1988-04-26 The Perkin-Elmer Corporation Optical sensor circuitry
JP2548930B2 (ja) * 1987-02-16 1996-10-30 旭光学工業株式会社 半導体レ−ザの光出力制御装置
JPH0814625B2 (ja) * 1987-09-09 1996-02-14 キヤノン株式会社 紙葉体検出装置
US4857825A (en) * 1988-09-16 1989-08-15 Datatape, Inc. Voltage controlled resistor
US5055840A (en) * 1990-01-16 1991-10-08 Carroll Touch Incorporated Infrared touch input device and light emitted activation circuit
DE4102152A1 (de) * 1991-01-25 1992-07-30 Lamarche Jean Luc Optoelektronischer sensor
DE4215167A1 (de) * 1992-05-08 1993-11-11 Bayerische Motoren Werke Ag Faseroptische Vorrichtung in Kraftfahrzeugen
DE4238666C2 (de) * 1992-11-17 1994-11-24 Leuze Electronic Gmbh & Co Mit einem Sender und einem Empfänger ausgerüstete Einrichtung zum Erfassen von Objekten
DE4413079A1 (de) * 1994-04-15 1995-10-19 Schleicher & Co Int Schalteinrichtung zum Schalten eines Schneidwerk-Antriebes eines zerkleinernden Dokumentenvernichters
DE4437348C2 (de) * 1994-10-19 2003-11-06 Schleicher & Co Int Ag Dokumentenvernichter mit einem Schneidwerk und einer Lichtschranke
JP3839342B2 (ja) * 2002-04-11 2006-11-01 株式会社リコー 給紙装置及びそれを備えた画像形成装置
US20040196363A1 (en) * 2003-04-01 2004-10-07 Gary Diamond Video identification verification system
US7215891B1 (en) 2003-06-06 2007-05-08 Jds Uniphase Corporation Integrated driving, receiving, controlling, and monitoring for optical transceivers
US7170536B2 (en) * 2004-09-03 2007-01-30 Kabushiki Kaisha Toshiba Light beam scanning apparatus and image forming apparatus
JP6158611B2 (ja) * 2013-06-26 2017-07-05 理想科学工業株式会社 搬送装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5417090A (en) * 1977-07-06 1979-02-08 Laurel Bank Machine Co Device of detecting travelling of paper money* etc*
JPS57137244A (en) * 1981-11-16 1982-08-24 Canon Inc Sensing device of copying machine
JPS57163888A (en) * 1981-04-02 1982-10-08 Fujitsu Ltd Adjusting method for photodetecting circuit

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1623778B2 (de) * 1967-10-19 1976-02-12 Hartmann & Braun Ag, 6000 Frankfurt Lichtschranke
DE2059010A1 (de) * 1970-12-01 1972-06-15 Alfons Endl Lichtschranke mit konstanter Ansprechschwelle
AU2383277A (en) * 1976-05-05 1978-10-05 Gen Electric Photoelectric signal generating circuits
US4097731A (en) * 1977-06-02 1978-06-27 Burroughs Corporation Automatic gain control for photosensing devices
CH639196A5 (de) * 1977-11-23 1983-10-31 Asea Ab Messgeraet zum messen von physikalischen groessen mittels optischer mittel.
DE2941739C2 (de) * 1979-10-16 1982-02-18 Krohne Meßtechnik GmbH & Co KG, 4100 Duisburg Lichtgitter
US4443695A (en) * 1980-01-25 1984-04-17 Canon Kabushiki Kaisha Apparatus for controlling the quantity of light
JPS56133574U (US06650917-20031118-M00005.png) * 1980-03-11 1981-10-09
US4352013A (en) * 1980-06-02 1982-09-28 Burroughs Corporation Track sensor controller
JPS5713327A (en) * 1980-06-27 1982-01-23 Laurel Bank Mach Co Ltd Optical detector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5417090A (en) * 1977-07-06 1979-02-08 Laurel Bank Machine Co Device of detecting travelling of paper money* etc*
JPS57163888A (en) * 1981-04-02 1982-10-08 Fujitsu Ltd Adjusting method for photodetecting circuit
JPS57137244A (en) * 1981-11-16 1982-08-24 Canon Inc Sensing device of copying machine

Also Published As

Publication number Publication date
DE3337865A1 (de) 1984-04-19
JPS5970990A (ja) 1984-04-21
US4605848A (en) 1986-08-12
DE3337865C2 (US06650917-20031118-M00005.png) 1989-06-22

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