JPS6489230A - Photoelectric switch of multiple beam type - Google Patents
Photoelectric switch of multiple beam typeInfo
- Publication number
- JPS6489230A JPS6489230A JP24652887A JP24652887A JPS6489230A JP S6489230 A JPS6489230 A JP S6489230A JP 24652887 A JP24652887 A JP 24652887A JP 24652887 A JP24652887 A JP 24652887A JP S6489230 A JPS6489230 A JP S6489230A
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- sections
- light
- photoelectric switch
- beam type
- 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
- Switches Operated By Changes In Physical Conditions (AREA)
Abstract
PURPOSE:To obtain a multi-beam type photoelectric switch which makes a dedicated controller unnecessary and eliminates mutual interference by holding a multiplicity of light emitting sections and light receiving sections in one case and providing the light emitting section with a narrow band filter allowing a fundamental frequency component of modulation light to pass through. CONSTITUTION:A light emitting unit 21, a light receiving unit 22, or a light emitting and receiving unit is constituted by holding a multiplicity of light emitting sections 3a-3d and light receiving sections 4a-4d in single housings 20a, 20b. Frequencies of modulation light of respective light emitting sections 3a-3d are set to different frequencies. Narrow band filters for allowing fundamental frequency components only of the modulation light of respective light emitting sections 3a-3d to pass through are arranged to respective light receiving sections 4a-4d respectively corresponding to light emitting sections 3a-3d. This eliminates mutual interference, and makes a synchronous signal namely a dedicated controller unnecessary. As a result, a multi-beam type photoelectric switch can be obtained which causes no errors in operation even if each unit is connected in succession with a high reliability.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24652887A JPS6489230A (en) | 1987-09-30 | 1987-09-30 | Photoelectric switch of multiple beam type |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24652887A JPS6489230A (en) | 1987-09-30 | 1987-09-30 | Photoelectric switch of multiple beam type |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6489230A true JPS6489230A (en) | 1989-04-03 |
Family
ID=17149747
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24652887A Pending JPS6489230A (en) | 1987-09-30 | 1987-09-30 | Photoelectric switch of multiple beam type |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6489230A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02135630A (en) * | 1988-11-14 | 1990-05-24 | Keyence Corp | Multiple optical axes photoelectric switch |
JP2002140967A (en) * | 2000-10-31 | 2002-05-17 | Sunx Ltd | Multiple optical axis photoelectric switch |
JP2003016891A (en) * | 2001-06-29 | 2003-01-17 | Keyence Corp | Multi-optical axial photoelectric sensor and projector and light receiver included therein |
US7550708B2 (en) | 2007-06-29 | 2009-06-23 | Keyence Corporation | Photoelectric sensor and emitting device for photoelectric sensor |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5226550B2 (en) * | 1973-10-10 | 1977-07-14 |
-
1987
- 1987-09-30 JP JP24652887A patent/JPS6489230A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5226550B2 (en) * | 1973-10-10 | 1977-07-14 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02135630A (en) * | 1988-11-14 | 1990-05-24 | Keyence Corp | Multiple optical axes photoelectric switch |
JP2002140967A (en) * | 2000-10-31 | 2002-05-17 | Sunx Ltd | Multiple optical axis photoelectric switch |
JP2003016891A (en) * | 2001-06-29 | 2003-01-17 | Keyence Corp | Multi-optical axial photoelectric sensor and projector and light receiver included therein |
US7550708B2 (en) | 2007-06-29 | 2009-06-23 | Keyence Corporation | Photoelectric sensor and emitting device for photoelectric sensor |
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