GB1482753A - Location arrangements - Google Patents

Location arrangements

Info

Publication number
GB1482753A
GB1482753A GB491674A GB491674A GB1482753A GB 1482753 A GB1482753 A GB 1482753A GB 491674 A GB491674 A GB 491674A GB 491674 A GB491674 A GB 491674A GB 1482753 A GB1482753 A GB 1482753A
Authority
GB
United Kingdom
Prior art keywords
detectors
radiation
sections
source
infra
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.)
Expired
Application number
GB491674A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi 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 Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB491674A priority Critical patent/GB1482753A/en
Publication of GB1482753A publication Critical patent/GB1482753A/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
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/78—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using electromagnetic waves other than radio waves
    • G01S3/782—Systems for determining direction or deviation from predetermined direction
    • G01S3/783—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived from static detectors or detector systems
    • G01S3/784—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived from static detectors or detector systems using a mosaic of detectors

Abstract

1482753 Radiation source direction finding MARCONI CO Ltd 6 Nov 1974 [2 Feb 1974] 04916/74 Heading H4D To determine the direction in azimuth of a source of radiation, and in particular the direction of a source of infra-red radiation, e.g. a sniper, at least part of the 360 degrees of azimuth is divided into a plurality of possibly abutting sections, which sections are respectively surveilled by a plurality of detectors 17- 32, the azimuthal scene being directed on to the detectors, e.g. by respective reflectors 1-16 and the outputs of the detectors sequentially fed to a CRT having a rotating time base in sychronism with the feeding of the detectors. The infra-red detectors may take the form of a complete annulus of plastics material, or alternatively individual sections, sandwiched between a lower (earthed) electrode 34 common to all the detectors, and individual upper electrodes, e.g. 36 connected to the output amplifiers 37-52. The plastics material (PVF 2 ) is electrically polarized by heating to 100‹ C. for 1 hour whilst applying an electric field of 100 kv./cm. across its thickness. The material then is cooled whilst maintaining the electric field.
GB491674A 1974-11-06 1974-11-06 Location arrangements Expired GB1482753A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB491674A GB1482753A (en) 1974-11-06 1974-11-06 Location arrangements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB491674A GB1482753A (en) 1974-11-06 1974-11-06 Location arrangements

Publications (1)

Publication Number Publication Date
GB1482753A true GB1482753A (en) 1977-08-17

Family

ID=9786284

Family Applications (1)

Application Number Title Priority Date Filing Date
GB491674A Expired GB1482753A (en) 1974-11-06 1974-11-06 Location arrangements

Country Status (1)

Country Link
GB (1) GB1482753A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0236035A2 (en) * 1986-02-24 1987-09-09 Gec-Marconi Limited A laser threat warning system
WO1992015024A1 (en) * 1991-02-14 1992-09-03 Försvarets Forskningsanstalt A laser warning device
EP0713119A1 (en) * 1994-11-18 1996-05-22 Thomson-Csf Static infrared panoramic surveillance device with multiple detector arrays
EP1990649A1 (en) * 2007-05-10 2008-11-12 Leica Geosystems AG Positioning method, laser beam detector and detector-reflector device for a positioning system

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0236035A2 (en) * 1986-02-24 1987-09-09 Gec-Marconi Limited A laser threat warning system
EP0236035A3 (en) * 1986-02-24 1987-10-28 The Marconi Company Limited A laser threat warning system
WO1992015024A1 (en) * 1991-02-14 1992-09-03 Försvarets Forskningsanstalt A laser warning device
US5440116A (en) * 1991-02-14 1995-08-08 Forsvarets Forskningsanstalt Laser warning device providing a direction of laser radiation
EP0713119A1 (en) * 1994-11-18 1996-05-22 Thomson-Csf Static infrared panoramic surveillance device with multiple detector arrays
FR2727215A1 (en) * 1994-11-18 1996-05-24 Thomson Csf STATIC INFRARED PANORAMIC STACKING DEVICE HAVING MULTIPLE MATRIX DETECTORS
US5627374A (en) * 1994-11-18 1997-05-06 Thomson-Csf Static infrared panoramic watching device with multiple matrix detectors
EP1990649A1 (en) * 2007-05-10 2008-11-12 Leica Geosystems AG Positioning method, laser beam detector and detector-reflector device for a positioning system
WO2008138507A1 (en) * 2007-05-10 2008-11-20 Leica Geosystems Ag Method for determining position, laser beam detector and detector-reflector device for a system for determining position
US20100302557A1 (en) * 2007-05-10 2010-12-02 Leica Geosystems Ag Method for determining position, laser beam detector and detector-reflector device for a system for determining position
US8259311B2 (en) 2007-05-10 2012-09-04 Leica Geosystems Ag Method for determining position, laser beam detector and detector-reflector device for a system for determining position
CN101680941B (en) * 2007-05-10 2013-04-03 莱卡地球系统公开股份有限公司 Method for determining position, laser beam detector and detector-reflector device for a system for determining position

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee