JPS5740668A - Signal detector - Google Patents

Signal detector

Info

Publication number
JPS5740668A
JPS5740668A JP55116696A JP11669680A JPS5740668A JP S5740668 A JPS5740668 A JP S5740668A JP 55116696 A JP55116696 A JP 55116696A JP 11669680 A JP11669680 A JP 11669680A JP S5740668 A JPS5740668 A JP S5740668A
Authority
JP
Japan
Prior art keywords
light
fiber
photofiber
receiving
photofibers
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.)
Granted
Application number
JP55116696A
Other languages
Japanese (ja)
Other versions
JPH0152707B2 (en
Inventor
Mitsuki Sagane
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 JP55116696A priority Critical patent/JPS5740668A/en
Publication of JPS5740668A publication Critical patent/JPS5740668A/en
Publication of JPH0152707B2 publication Critical patent/JPH0152707B2/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
    • G01V8/12—Detecting, e.g. by using light barriers using one transmitter and one receiver

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

PURPOSE:To provide a photointerruptor which can prevent the production of noise due to disturbance light, by a method wherein a light is emitted and received via photofibers whose and surfaces are positioned facing and opposite to each other, and a light-receiving angle to a light-receiving fiber for external light is limited to a given extent. CONSTITUTION:Support members 12 and 13 support a light-receiving photofiber 14 and a light-transferring photofiber 15, respectively, which are located photo- coaxially, so that end surfaces of the photofibers are positioned facing and opposite to each other. The interruption of light generates a detection signal of a member 9 to be detected. The shape of the member 13 is formed such that an angle thetan of a straight line l2, connecting together the outer edge of the member 13 and end surface edge of the fiber 15, to a photoaxis l1, is larger than a light-receiving angle which the fiber 14 can transmit in a whole reflection manner. Thus, exteral light except light transmitted from the end surface of the photofiber 15 does not propagate through the fiber 14 to produce a photointerruptor which can check the production of noise due to disturbance light.
JP55116696A 1980-08-25 1980-08-25 Signal detector Granted JPS5740668A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55116696A JPS5740668A (en) 1980-08-25 1980-08-25 Signal detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55116696A JPS5740668A (en) 1980-08-25 1980-08-25 Signal detector

Publications (2)

Publication Number Publication Date
JPS5740668A true JPS5740668A (en) 1982-03-06
JPH0152707B2 JPH0152707B2 (en) 1989-11-09

Family

ID=14693584

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55116696A Granted JPS5740668A (en) 1980-08-25 1980-08-25 Signal detector

Country Status (1)

Country Link
JP (1) JPS5740668A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61186804A (en) * 1985-02-11 1986-08-20 ゼロツクス　コーポレーシヨン Photodetector

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS509452A (en) * 1973-05-22 1975-01-30
JPS51148449A (en) * 1975-06-16 1976-12-20 Hitachi Ltd Detector of materials inside conveying-cont atner

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS509452A (en) * 1973-05-22 1975-01-30
JPS51148449A (en) * 1975-06-16 1976-12-20 Hitachi Ltd Detector of materials inside conveying-cont atner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61186804A (en) * 1985-02-11 1986-08-20 ゼロツクス　コーポレーシヨン Photodetector

Also Published As

Publication number Publication date
JPH0152707B2 (en) 1989-11-09

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