JPS6485419A - Photoelectric switch - Google Patents

Photoelectric switch

Info

Publication number
JPS6485419A
JPS6485419A JP24295287A JP24295287A JPS6485419A JP S6485419 A JPS6485419 A JP S6485419A JP 24295287 A JP24295287 A JP 24295287A JP 24295287 A JP24295287 A JP 24295287A JP S6485419 A JPS6485419 A JP S6485419A
Authority
JP
Japan
Prior art keywords
light
polarizer
waveform
transmitted
switches
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
JP24295287A
Other languages
Japanese (ja)
Inventor
Akihiro Aoi
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.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP24295287A priority Critical patent/JPS6485419A/en
Publication of JPS6485419A publication Critical patent/JPS6485419A/en
Pending legal-status Critical Current

Links

Landscapes

  • Switches Operated By Changes In Physical Conditions (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To prevent malfunction due to mutual interference in case of three or more switches to be provided in parallel by devising a circuit setting a waveform mode of an electric signal such that the waveform mode of the photoe lectric switch differs. CONSTITUTION:A light radiated from a projection element 11 is polarized by a polarization filter 13, and when a voltage fed to the polarizer 14 via the polarizer 14 is turned on, the light is transmitted in the polarized direction and when the voltage is turned off, the light is transmitted while the polarizing direction is rotated by 90 deg.. Since the polarizer 19 at the photodetector 16 side is driven by a waveform voltage synchronously with the polarizer 14 at the projector 11, the light is transmitted as it is and enters the photodetector 16. In providing plural photoelectric switches in parallel closely, when the waveform mode of the photodetection switch differs by a setting circuit, even if a light from other photoelectric switch with a different waveform comes, since the polarizing direction of the polarizers 14, 19 differ, the light is not received. Thus, even when three or more plural switches are provided closely side by side, the mutual interference is prevented and malfunction is prevented.
JP24295287A 1987-09-28 1987-09-28 Photoelectric switch Pending JPS6485419A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24295287A JPS6485419A (en) 1987-09-28 1987-09-28 Photoelectric switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24295287A JPS6485419A (en) 1987-09-28 1987-09-28 Photoelectric switch

Publications (1)

Publication Number Publication Date
JPS6485419A true JPS6485419A (en) 1989-03-30

Family

ID=17096667

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24295287A Pending JPS6485419A (en) 1987-09-28 1987-09-28 Photoelectric switch

Country Status (1)

Country Link
JP (1) JPS6485419A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6257177B1 (en) 1998-03-04 2001-07-10 Daimlerchrysler Ag Water pump for the cooling circuit of an internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6257177B1 (en) 1998-03-04 2001-07-10 Daimlerchrysler Ag Water pump for the cooling circuit of an internal combustion engine

Similar Documents

Publication Publication Date Title
EP0355957A3 (en) Multiple image, single display system and method
JPS64519A (en) Liquid crystal display device
EP1335466A3 (en) Self-powered apparatus and method for optically detecting arcing faults in electric power systems in the presence of other light sources
CA2119143A1 (en) Wavelength Stabilization
CA2104978A1 (en) Optical Voltage-Electric Field Sensor
CA2297108A1 (en) Arrangement and method for electrically controlling the intensity of unpolarised light
JPS6485419A (en) Photoelectric switch
EP0322893A3 (en) A polarization diversity optical receiving apparatus
DE59309248D1 (en) Module with bus coupling unit
ATE93056T1 (en) OPTICAL SENSOR.
JPS6485481A (en) Incident light limiting device for image pickup device for vehicle
CA2003291A1 (en) Direct current restorer
JPS6420479A (en) Photosensor
WO2002029473A1 (en) Optical circulator and optical switch
JPS5595896A (en) Working time setting device
SU1103186A1 (en) Device for radiant protection
JPS54157644A (en) Photo logic circuit device
JPS56137327A (en) Optical circulator
EP0225737A3 (en) Optical state of polorisation modulator
JPS6444179A (en) Television receiver
JPH07154326A (en) Optical transmitting means
JPS6478168A (en) Multi-channel voltage detecting device
JPH01122531A (en) Photoelectric switch
NZ330567A (en) Optical switch using electro-optical crystal with at least two collinear optical signals and at least one control beam
JPS5725783A (en) Pickup device