JPS5426760A - Optical body detector - Google Patents
Optical body detectorInfo
- 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
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
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)
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 |
-
1977
- 1977-07-30 JP JP9157577A patent/JPS5426760A/en active Pending
Cited By (4)
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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