GB2007454A - Laser warning devices for indicating receipt of laser radiation - Google Patents

Laser warning devices for indicating receipt of laser radiation

Info

Publication number
GB2007454A
GB2007454A GB7835697A GB7835697A GB2007454A GB 2007454 A GB2007454 A GB 2007454A GB 7835697 A GB7835697 A GB 7835697A GB 7835697 A GB7835697 A GB 7835697A GB 2007454 A GB2007454 A GB 2007454A
Authority
GB
United Kingdom
Prior art keywords
flip
radiation
detectors
inputs
flops
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
GB7835697A
Other versions
GB2007454B (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.)
Simrad AS
Original Assignee
Simrad AS
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 Simrad AS filed Critical Simrad AS
Publication of GB2007454A publication Critical patent/GB2007454A/en
Application granted granted Critical
Publication of GB2007454B publication Critical patent/GB2007454B/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
    • 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
    • G01S7/4804—Auxiliary means for detecting or identifying lidar signals or the like, e.g. laser illuminators

Abstract

Comprises laser radiation detectors 2, 3, 4, 5 sensing receipt of laser radiation from a respective sector, and connected via threshold detectors 26 to 29 and inverters 30 to 33 to J inputs of JK flip-flops 34 to 37 with indicators 14 to 17, (lamps) connected to the Q outputs thereof. NAND-gate 38 has four inputs connected to the outputs of the threshold detectors 26 to 29 and an output connected via inverter 39 to a first input of an RS flip-flop 40 and to clock inputs of the flip-flops. The outputs of the RS flip-flop 40 are connected back to a fifth input of the gate 38 and via a monostable circuit 41 and a pulse former 42, to clear inputs of the flip- flops and to the other input of the RS flip-flop 40. The threshold detectors render the device insensitive to radiation below a particular threshold. Items 34 to 42 act as a radiation time of arrival discriminator such that on receipt of direct radiation by one or more of the detectors the associated 14 to 17 will be lit and the device will be rendered insensitive to delayed reflected radiation for a short predetermined period (mono 41) thereafter. <IMAGE>
GB7835697A 1977-09-21 1978-09-05 Laser warning device for indicating receipt of laser radiation Expired GB2007454B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO773087A NO144500C (en) 1977-09-21 1977-09-21 STRAALINGSVARSLER.

Publications (2)

Publication Number Publication Date
GB2007454A true GB2007454A (en) 1979-05-16
GB2007454B GB2007454B (en) 1982-03-03

Family

ID=19883703

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7835697A Expired GB2007454B (en) 1977-09-21 1978-09-05 Laser warning device for indicating receipt of laser radiation

Country Status (3)

Country Link
GB (1) GB2007454B (en)
NO (1) NO144500C (en)
SE (1) SE7809426L (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0506641A1 (en) * 1991-03-27 1992-09-30 CelsiusTech Electronics AB Laser warning device and module for use in such a laser warning device
EP0549550A1 (en) * 1991-12-20 1993-06-30 NobelTech Electronics AB Threat sector indicating warning device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0506641A1 (en) * 1991-03-27 1992-09-30 CelsiusTech Electronics AB Laser warning device and module for use in such a laser warning device
EP0549550A1 (en) * 1991-12-20 1993-06-30 NobelTech Electronics AB Threat sector indicating warning device

Also Published As

Publication number Publication date
SE7809426L (en) 1979-03-22
NO773087L (en) 1979-03-22
NO144500C (en) 1981-09-16
GB2007454B (en) 1982-03-03
NO144500B (en) 1981-06-01

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Legal Events

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