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GB2013330A - Detecting presence or absence etc. of object - Google Patents

Detecting presence or absence etc. of object

Info

Publication number
GB2013330A
GB2013330A GB7847257A GB7847257A GB2013330A GB 2013330 A GB2013330 A GB 2013330A GB 7847257 A GB7847257 A GB 7847257A GB 7847257 A GB7847257 A GB 7847257A GB 2013330 A GB2013330 A GB 2013330A
Authority
GB
United Kingdom
Prior art keywords
optical
optical system
defining
optical path
converging lens
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
Application number
GB7847257A
Other versions
GB2013330B (en
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.)
Lasag AG
Original Assignee
Lasag AG
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 Lasag AG filed Critical Lasag AG
Publication of GB2013330A publication Critical patent/GB2013330A/en
Application granted granted Critical
Publication of GB2013330B publication Critical patent/GB2013330B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01S7/4813—Housing arrangements
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

An optical detector comprises a first optical system (1,2,3,4) defining an optical path and arranged to transmit infra red electromagnetic radiation (9) from a modulated light emitting diode 1 to a focus 8'; a second optical system (5,6,7) defining an optical path parallel to said optical path of said first optical system and arranged to direct electro- magnetic radiation (10) after reflection by an object when at position 8' on to a phototransistor 7; and a converging lens (8) associated in common with said first and second optical systems and arranged such that said optical paths of said first and second optical systems are parallel to and symmetrical about the axis of said converging lens on one side thereof. In the same housing in a plane perpendicular to the optical systems, two projectors are provided for setting up the apparatus by superimposition of images at 8'. Circuitry is detailed in Fig. 5 (not shown). Other applications for the apparatus are suggested. <IMAGE>
GB7847257A 1977-12-06 1978-12-05 Optical detector Expired GB2013330B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1488277A CH621001A5 (en) 1977-12-06 1977-12-06

Publications (2)

Publication Number Publication Date
GB2013330A true GB2013330A (en) 1979-08-08
GB2013330B GB2013330B (en) 1982-06-30

Family

ID=4404534

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7847257A Expired GB2013330B (en) 1977-12-06 1978-12-05 Optical detector

Country Status (4)

Country Link
CH (1) CH621001A5 (en)
DE (1) DE2852153A1 (en)
FR (1) FR2411421A1 (en)
GB (1) GB2013330B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2183825A (en) * 1985-11-30 1987-06-10 Peter Henry Casswell Active infra-red detector
GB2188415A (en) * 1986-01-23 1987-09-30 Robert Schooler Golf ball locating device
EP0265701A3 (en) * 1986-10-29 1991-11-13 Pirelli Sistemi Antivibranti S.P.A. Optical sensor for measuring the distance between two elements
EP0988779A1 (en) * 1998-09-23 2000-03-29 Dickey-john Corporation Infrared reflective article counting/detecting device

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2554244B1 (en) * 1983-10-27 1986-02-07 Commissariat Energie Atomique BACK-DIFFUSED RADIATION PROXIMETER FOR USE IN PARTICULAR IN TELEMANIPULATION OR ROBOTICS AND PROCESSING SYSTEM THEREOF
DE4023704A1 (en) * 1990-07-26 1992-02-06 Agfa Gevaert Ag Reflex light barrier with infrared transmission diode - has filter and comparator stages with receiver circuit clamping when transmission diode inactive
DE4141469C2 (en) * 1991-12-16 1997-07-17 Sick Ag Method for operating an optical sensor arrangement for the detection of objects present in a monitoring area, and such an optical sensor arrangement
DE4203850A1 (en) * 1992-02-10 1993-08-12 Reinhold Ott Detecting movement of doors, windows etc. - using e.g. infrared light source and receiver, with radiation reaching receiver when object is in set position
FR2694457B1 (en) * 1992-07-31 1994-09-30 Chebbi Brahim Semiconductor laser for detecting light radiation, method for obtaining a photosensitive detector, and application of such a laser to detect light radiation.
FR2744838B1 (en) * 1996-02-13 1998-03-27 Schneider Electric Sa BEAM RETURN PHOTOELECTRIC DETECTOR
DE19821112C1 (en) * 1998-05-06 1999-11-18 Visolux Elektronik Gmbh Light reflection sensor for object detection

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3037418A (en) * 1958-01-16 1962-06-05 Askania Werke Ag Electro-optical device
FR1531569A (en) * 1967-05-23 1968-07-05 Prec Scient Et Ind Light ray detection device
GB1214148A (en) * 1967-12-12 1970-12-02 Mining & Chemical Products Ltd Device for detecting variations in the surface reflectance of objects
SE358243B (en) * 1971-11-25 1973-07-23 Aga Ab
DE2452794C3 (en) * 1974-11-07 1979-08-30 Philips Patentverwaltung Gmbh, 2000 Hamburg Automatic level adjustment circuit for presettable IR pulse monitoring devices with clocked receiver
DE2540665A1 (en) * 1975-09-12 1977-03-17 Bosch Gmbh Robert Optical system for range finding sender:receiver - has infrared LED and focussing optical system preventing collision of vehicles

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2183825A (en) * 1985-11-30 1987-06-10 Peter Henry Casswell Active infra-red detector
GB2188415A (en) * 1986-01-23 1987-09-30 Robert Schooler Golf ball locating device
EP0265701A3 (en) * 1986-10-29 1991-11-13 Pirelli Sistemi Antivibranti S.P.A. Optical sensor for measuring the distance between two elements
EP0988779A1 (en) * 1998-09-23 2000-03-29 Dickey-john Corporation Infrared reflective article counting/detecting device
US6373057B1 (en) 1998-09-23 2002-04-16 Dickey-John Corporation Infrared reflective article counting/detecting device

Also Published As

Publication number Publication date
GB2013330B (en) 1982-06-30
FR2411421A1 (en) 1979-07-06
DE2852153A1 (en) 1979-06-07
CH621001A5 (en) 1980-12-31

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee