GB1482753A - Location arrangements - Google Patents
Location arrangementsInfo
- 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
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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Geophysics And Detection Of Objects (AREA)
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.
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)
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 |
-
1974
- 1974-11-06 GB GB491674A patent/GB1482753A/en not_active Expired
Cited By (12)
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***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 |