FR2442457A1 - Detection of objects passing through light beam - uses two beams of different wavelengths to eliminate erroneous reflections and has optical filter on reflector support cap - Google Patents
Detection of objects passing through light beam - uses two beams of different wavelengths to eliminate erroneous reflections and has optical filter on reflector support capInfo
- Publication number
- FR2442457A1 FR2442457A1 FR7833402A FR7833402A FR2442457A1 FR 2442457 A1 FR2442457 A1 FR 2442457A1 FR 7833402 A FR7833402 A FR 7833402A FR 7833402 A FR7833402 A FR 7833402A FR 2442457 A1 FR2442457 A1 FR 2442457A1
- Authority
- FR
- France
- Prior art keywords
- beams
- light beam
- optical filter
- different wavelengths
- support cap
- 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
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
- G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers
- G01V8/22—Detecting, e.g. by using light barriers using multiple transmitters or receivers using reflectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
- F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
- F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
- F16P3/14—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
- F16P3/144—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using light grids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/04—Systems determining the presence of a target
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/74—Systems using reradiation of electromagnetic waves other than radio waves, e.g. IFF, i.e. identification of friend or foe
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4811—Constructional features, e.g. arrangements of optical elements common to transmitter and receiver
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
- G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
- G08B13/184—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier using radiation reflectors
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Mechanical Engineering (AREA)
- Geophysics And Detection Of Objects (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
A photoelectric security system detects products or objects which break a light beam. Reflecting objects can cause erroneous signals and this is overcome by emitting two light beams of different wavelengths in the same direction. Two emitters (1, 2) powered from a common source (9) utilise a separator (5) to emit beams on the same axis. The rays are collected by a lens (8) and a microprism reflector (14) reflects the beams to a receiving lens (7). The received beams are separated (6) for two receivers (3, 4). An optical filter on the reflector support cap (13) permits only certain wavelengths to be reflected. The receiver outputs are applied to amplifier stages (10, 11) and a logic circuit (12) provides a single data output signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7833402A FR2442457A1 (en) | 1978-11-27 | 1978-11-27 | Detection of objects passing through light beam - uses two beams of different wavelengths to eliminate erroneous reflections and has optical filter on reflector support cap |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7833402A FR2442457A1 (en) | 1978-11-27 | 1978-11-27 | Detection of objects passing through light beam - uses two beams of different wavelengths to eliminate erroneous reflections and has optical filter on reflector support cap |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2442457A1 true FR2442457A1 (en) | 1980-06-20 |
FR2442457B1 FR2442457B1 (en) | 1982-12-10 |
Family
ID=9215380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7833402A Granted FR2442457A1 (en) | 1978-11-27 | 1978-11-27 | Detection of objects passing through light beam - uses two beams of different wavelengths to eliminate erroneous reflections and has optical filter on reflector support cap |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2442457A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0105528A2 (en) * | 1982-10-06 | 1984-04-18 | Erwin Sick GmbH Optik-Elektronik | Reflection light barrier |
FR2554598A1 (en) * | 1983-11-04 | 1985-05-10 | Onera (Off Nat Aerospatiale) | Opto-electronic method and apparatus for locating targets carrying polarised luminous points |
FR2554612A1 (en) * | 1983-11-04 | 1985-05-10 | Onera (Off Nat Aerospatiale) | METHOD AND DEVICE FOR AUTOMATICALLY GUIDING MOBILES, PARTICULARLY SELF-PROPELLED SELF-DRIVEN TROLLEYS |
EP0273215A2 (en) * | 1986-12-09 | 1988-07-06 | Erwin Sick GmbH Optik-Elektronik | Autocollimatory light curtain |
EP0273433A2 (en) * | 1986-12-26 | 1988-07-06 | OMRON Corporation | Reflection type photoelectric switch |
EP0329083A2 (en) * | 1988-02-15 | 1989-08-23 | Omron Tateisi Electronics Co. | Photoelectric switching apparatus of reflection type |
WO1991004499A1 (en) * | 1989-09-15 | 1991-04-04 | Michiel Kassies | A method of, and apparatus for, detecting an object |
EP0560459A1 (en) * | 1992-03-11 | 1993-09-15 | N.V. Nederlandsche Apparatenfabriek NEDAP | Device for detecting the position of a movably body |
EP1376160A2 (en) * | 2002-06-22 | 2004-01-02 | Hans-Erich Sen. Gubela | Partial reflector and optical security sensor system |
EP4040197A1 (en) * | 2021-02-09 | 2022-08-10 | Sick Ag | Spectral sensitive optoelectronic device and method for monitoring of a surveillance area |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1038402A (en) * | 1962-03-12 | 1966-08-10 | Ass Elect Ind | Improvements relating to radiation sensitive equipment |
GB1138115A (en) * | 1966-01-26 | 1968-12-27 | Servodan As | Controlling system using modulated light |
DE1934321A1 (en) * | 1969-07-07 | 1971-01-21 | Sick Erwin | Photoelectric barrier |
-
1978
- 1978-11-27 FR FR7833402A patent/FR2442457A1/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1038402A (en) * | 1962-03-12 | 1966-08-10 | Ass Elect Ind | Improvements relating to radiation sensitive equipment |
GB1138115A (en) * | 1966-01-26 | 1968-12-27 | Servodan As | Controlling system using modulated light |
DE1934321A1 (en) * | 1969-07-07 | 1971-01-21 | Sick Erwin | Photoelectric barrier |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0105528A2 (en) * | 1982-10-06 | 1984-04-18 | Erwin Sick GmbH Optik-Elektronik | Reflection light barrier |
EP0105528A3 (en) * | 1982-10-06 | 1986-07-02 | Erwin Sick GmbH Optik-Elektronik | Reflection light barrier |
FR2554598A1 (en) * | 1983-11-04 | 1985-05-10 | Onera (Off Nat Aerospatiale) | Opto-electronic method and apparatus for locating targets carrying polarised luminous points |
FR2554612A1 (en) * | 1983-11-04 | 1985-05-10 | Onera (Off Nat Aerospatiale) | METHOD AND DEVICE FOR AUTOMATICALLY GUIDING MOBILES, PARTICULARLY SELF-PROPELLED SELF-DRIVEN TROLLEYS |
EP0146428A1 (en) * | 1983-11-04 | 1985-06-26 | Office National D'etudes Et De Recherches Aerospatiales(O.N.E.R.A.) | Automatic guiding method and apparatsu for moving objects especially for driverless self-propelled vehicles |
EP0273215A2 (en) * | 1986-12-09 | 1988-07-06 | Erwin Sick GmbH Optik-Elektronik | Autocollimatory light curtain |
EP0273215A3 (en) * | 1986-12-09 | 1988-07-27 | Erwin Sick Gmbh Optik-Elektronik | Autocollimatory light curtain |
EP0273433A2 (en) * | 1986-12-26 | 1988-07-06 | OMRON Corporation | Reflection type photoelectric switch |
US5004908A (en) * | 1986-12-26 | 1991-04-02 | Omron Tateisi Electronics Co. | Reflection type photoelectric switch for detecting the presence of an object |
EP0273433A3 (en) * | 1986-12-26 | 1989-11-15 | Omron Tateisi Electronics Co. | Reflection type photoelectric switch |
EP0329083A3 (en) * | 1988-02-15 | 1990-02-14 | Omron Tateisi Electronics Co. | Photoelectric switching apparatus of reflection type |
EP0329083A2 (en) * | 1988-02-15 | 1989-08-23 | Omron Tateisi Electronics Co. | Photoelectric switching apparatus of reflection type |
US5008529A (en) * | 1988-02-15 | 1991-04-16 | Omron Tateisi Electronics Co. | Photoelectric switching apparatus of reflection type projecting red and infrared light |
WO1991004499A1 (en) * | 1989-09-15 | 1991-04-04 | Michiel Kassies | A method of, and apparatus for, detecting an object |
EP0560459A1 (en) * | 1992-03-11 | 1993-09-15 | N.V. Nederlandsche Apparatenfabriek NEDAP | Device for detecting the position of a movably body |
EP1376160A2 (en) * | 2002-06-22 | 2004-01-02 | Hans-Erich Sen. Gubela | Partial reflector and optical security sensor system |
DE10228013A1 (en) * | 2002-06-22 | 2004-01-15 | Hans-Erich Sen. Gubela | Partial transmission reflector and optical safety sensor system |
EP1376160A3 (en) * | 2002-06-22 | 2004-06-23 | Hans-Erich Sen. Gubela | Partial reflector and optical security sensor system |
DE10228013B4 (en) * | 2002-06-22 | 2005-11-03 | Hans-Erich Sen. Gubela | Partial transmission reflector, use of the partial transmission reflector and optical sensor system |
EP4040197A1 (en) * | 2021-02-09 | 2022-08-10 | Sick Ag | Spectral sensitive optoelectronic device and method for monitoring of a surveillance area |
Also Published As
Publication number | Publication date |
---|---|
FR2442457B1 (en) | 1982-12-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5004908A (en) | Reflection type photoelectric switch for detecting the presence of an object | |
FR2442457A1 (en) | Detection of objects passing through light beam - uses two beams of different wavelengths to eliminate erroneous reflections and has optical filter on reflector support cap | |
JPS53110823A (en) | Optical information processor | |
GB1527965A (en) | Optical fire detector | |
ES2053665T3 (en) | OPTICAL BARRIER FOR REFLECTION. | |
KR0121313Y1 (en) | Optical pick-up device | |
FR2297431A1 (en) | Optical module for spectroscopic equipment - has block made of transparent or light transmitting plastic | |
EP0248408A3 (en) | A reflection type photo-electric switch | |
KR880701943A (en) | Optical scanning system | |
GB1476504A (en) | Optical target tracking arrangement | |
SU565409A1 (en) | Thermovisor | |
JPS5676074A (en) | Obstacle detector | |
JPS6484119A (en) | Object state detector | |
SU1038959A1 (en) | Photoelectric displacement converter | |
JPS57200961A (en) | Reader in optical magnetic disk recording and reproducing system | |
JPS6417347A (en) | Reflection type photoelectric switch | |
FR2222917A5 (en) | Optical head with lamp and photocell - separate half lenses with one for source one for cell | |
JPS5788421A (en) | Optical sensor | |
JPH06230110A (en) | Optical radar using optical fiber in optical system | |
JPH0425655B2 (en) | ||
IT1119619B (en) | Antitheft device using IR light barrier | |
JPS57204482A (en) | Reflection type photoelectric switch | |
JPH04284018A (en) | Photoelectric switch | |
JPS57123797A (en) | Motional feedback type speaker | |
JPS6413245A (en) | Optical pickup |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |