JPS5426760A - Optical body detector - Google Patents

Optical body detector

Info

Publication number
JPS5426760A
JPS5426760A JP9157577A JP9157577A JPS5426760A JP S5426760 A JPS5426760 A JP S5426760A JP 9157577 A JP9157577 A JP 9157577A JP 9157577 A JP9157577 A JP 9157577A JP S5426760 A JPS5426760 A JP S5426760A
Authority
JP
Japan
Prior art keywords
optical body
body detector
projector
fail
arranging
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
JP9157577A
Other languages
Japanese (ja)
Inventor
Tetsuo Kawasaki
Kikuo Kawasaki
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP9157577A priority Critical patent/JPS5426760A/en
Publication of JPS5426760A publication Critical patent/JPS5426760A/en
Pending legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices By Optical Means (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

PURPOSE: To make it possible to detect without fail the passage even of a small body moving at a high speed by arranging a projector and a receiver, which are positioned to face each other through a detecting area, at a preset spacing to correspond to the same modulated frequency.
COPYRIGHT: (C)1979,JPO&Japio
JP9157577A 1977-07-30 1977-07-30 Optical body detector Pending JPS5426760A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9157577A JPS5426760A (en) 1977-07-30 1977-07-30 Optical body detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9157577A JPS5426760A (en) 1977-07-30 1977-07-30 Optical body detector

Publications (1)

Publication Number Publication Date
JPS5426760A true JPS5426760A (en) 1979-02-28

Family

ID=14030324

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9157577A Pending JPS5426760A (en) 1977-07-30 1977-07-30 Optical body detector

Country Status (1)

Country Link
JP (1) JPS5426760A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57175273A (en) * 1981-04-23 1982-10-28 Kyosan Electric Mfg Co Ltd Obstacle detecting system
JPH0355510A (en) * 1989-07-25 1991-03-11 Sumitomo Cement Co Ltd Cofocal type optical microscope
JPH09197060A (en) * 1996-01-18 1997-07-31 Koito Ind Ltd Obstacle detector for railroad crossing
US11796713B2 (en) 2018-08-07 2023-10-24 Trinamix Gmbh Device and method for optically surveilling at least one area

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57175273A (en) * 1981-04-23 1982-10-28 Kyosan Electric Mfg Co Ltd Obstacle detecting system
JPH0355510A (en) * 1989-07-25 1991-03-11 Sumitomo Cement Co Ltd Cofocal type optical microscope
JPH09197060A (en) * 1996-01-18 1997-07-31 Koito Ind Ltd Obstacle detector for railroad crossing
US11796713B2 (en) 2018-08-07 2023-10-24 Trinamix Gmbh Device and method for optically surveilling at least one area

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