GB2226134A - Laser beam security barrier - Google Patents

Laser beam security barrier Download PDF

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Publication number
GB2226134A
GB2226134A GB8927405A GB8927405A GB2226134A GB 2226134 A GB2226134 A GB 2226134A GB 8927405 A GB8927405 A GB 8927405A GB 8927405 A GB8927405 A GB 8927405A GB 2226134 A GB2226134 A GB 2226134A
Authority
GB
United Kingdom
Prior art keywords
barrier
security barrier
laser beam
security
protected
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.)
Withdrawn
Application number
GB8927405A
Other versions
GB8927405D0 (en
Inventor
Thomas Lawrence Foulkes
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB8927405D0 publication Critical patent/GB8927405D0/en
Publication of GB2226134A publication Critical patent/GB2226134A/en
Withdrawn legal-status Critical Current

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Classifications

    • 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

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

The barrier is for a protected zone and is formed by a succession of laser beams 11 that are oscillated or traversed to generate a continuous curtain of protection along the perimeter of the zone. A second laser beam barrier 15 is provided inside the perimeter protected by the first which second barrier is activated should the first be penetrated. The first barrier can be a visible light barrier for detection only while the lasers of the second barrier may be more powerful in order to deter or prevent further progress of the intruder. <IMAGE>

Description

LASER SECURITY SYSTEM This invention is intended to provide a system for the protection of high security areas such as nuclear storage, sensitive military zones, prisons and other areas where maximum security against unauthorised entry or exit is to be strictly imposed.
According to the invention, a laser beam security barrier or curtain is created along the boundary or boundaries of the zone or zones to be protected. This may be from ground level to the height dictated by the protection requirements but typically will be 10 metres.
The curtains can be continuous and any object passing through a curtain will immediately set off appropriate alarms. A second or third curtain could consist of more powerful pulsed lasers for the purpose of immobilising the unauthorised person entering.
Arrangements according to the invention will now be described, by way of example, with reference to the accompanying drawing which is a diagrammatic plan of perimeter security barriers for a building to be protected.
In the arrangement shown, a multiple series of visible laser beams 11 are aimed along the perimeter surrounding a building 12 to be protected and are adapted to oscillate or traverse by means of a system of vibrating or rotating mirrors 13, thus creating a continuous visible wall.
Oscillating and rotating or otherwise complementarily traversing, receiving cells 14 continuously receive the laser beams even in fog conditions.
Should the receiving cells detect interruption in the laser light due to unauthorised entry the alarm will operate. Such lasers can be energised from both mains electrical and a battery back-up supply.
A second or third line of defence 15 can be a similar system of norse powerful lasers only operating in the event of the first or second line of defence being broken. These lasers could be CO2 gas lasers generating invisible beams and programed to provide sufficient energy to deter any further progress of the intruder.
Lasers used in this way can easily be provided with a very high degree of in-built protection against unauthorised interference.

Claims (6)

CLAIMS:
1. A laser beam security barrier along the boundary or boundaries of a zone or zones to be protected.
2. A security barrier according to Claim 1, comprising a succession of laser beams that are oscillated or traversed to generate a substantially continuous curtain of protection, the beams being sensed by detectors that are oscillated or traversed in complementary fashion.
3. A security barrier according to Claim 1 or Claim 2, wherein the laser beams are visible.
4. A security barrier according to any preceding claim, and having beyond it at least one further laser beam barrier comprised of more powerful lasers.
5. A security barrier system according to Claim 4, wherein the further barrier is activated upon penetration of the first barrier.
6. A security barrier system substantially as described with reference to the accompanying drawing.
GB8927405A 1988-12-02 1989-12-04 Laser beam security barrier Withdrawn GB2226134A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB888828202A GB8828202D0 (en) 1988-12-02 1988-12-02 Laser security system

Publications (2)

Publication Number Publication Date
GB8927405D0 GB8927405D0 (en) 1990-01-31
GB2226134A true GB2226134A (en) 1990-06-20

Family

ID=10647873

Family Applications (2)

Application Number Title Priority Date Filing Date
GB888828202A Pending GB8828202D0 (en) 1988-12-02 1988-12-02 Laser security system
GB8927405A Withdrawn GB2226134A (en) 1988-12-02 1989-12-04 Laser beam security barrier

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB888828202A Pending GB8828202D0 (en) 1988-12-02 1988-12-02 Laser security system

Country Status (1)

Country Link
GB (2) GB8828202D0 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1542185A1 (en) * 2003-12-11 2005-06-15 AT&T Corp. FSOC/radio intrusion detection system
US7980782B2 (en) 2004-07-30 2011-07-19 Astron Fiamm Safety S.P.A. Traffic safety integrated system, particularly in low visibility conditions and method of use of same

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623057A (en) * 1969-05-14 1971-11-23 Phinizy R B Laser perimeter intrusion detection system
US3688298A (en) * 1970-05-13 1972-08-29 Security Systems Inc Property protection system employing laser light
US3711846A (en) * 1971-02-08 1973-01-16 Holobeam Segment locating intrusion alarm system
US3739372A (en) * 1971-10-27 1973-06-12 Holobeam Optical intrusion alarm system
US3825916A (en) * 1972-10-20 1974-07-23 California Crime Technological Laser fence
US3898639A (en) * 1972-08-24 1975-08-05 Hrand M Muncheryan Security surveillance laser system
US3965355A (en) * 1974-10-23 1976-06-22 Maccabee Bruce S Low power infrared laser intrusion systems
US3987428A (en) * 1975-06-16 1976-10-19 The Raymond Lee Organization, Inc. Optical laser security system
GB2108743A (en) * 1981-11-09 1983-05-18 Hughes Technology Pty Ltd Laser security system
WO1984004986A1 (en) * 1983-06-03 1984-12-20 Hughes Technology Pty Ltd A multi-laser security curtain
EP0281747A2 (en) * 1987-03-12 1988-09-14 Erwin Sick GmbH Optik-Elektronik Light curtain

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623057A (en) * 1969-05-14 1971-11-23 Phinizy R B Laser perimeter intrusion detection system
US3688298A (en) * 1970-05-13 1972-08-29 Security Systems Inc Property protection system employing laser light
US3711846A (en) * 1971-02-08 1973-01-16 Holobeam Segment locating intrusion alarm system
US3739372A (en) * 1971-10-27 1973-06-12 Holobeam Optical intrusion alarm system
US3898639A (en) * 1972-08-24 1975-08-05 Hrand M Muncheryan Security surveillance laser system
US3825916A (en) * 1972-10-20 1974-07-23 California Crime Technological Laser fence
US3965355A (en) * 1974-10-23 1976-06-22 Maccabee Bruce S Low power infrared laser intrusion systems
US3987428A (en) * 1975-06-16 1976-10-19 The Raymond Lee Organization, Inc. Optical laser security system
GB2108743A (en) * 1981-11-09 1983-05-18 Hughes Technology Pty Ltd Laser security system
WO1984004986A1 (en) * 1983-06-03 1984-12-20 Hughes Technology Pty Ltd A multi-laser security curtain
EP0281747A2 (en) * 1987-03-12 1988-09-14 Erwin Sick GmbH Optik-Elektronik Light curtain

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1542185A1 (en) * 2003-12-11 2005-06-15 AT&T Corp. FSOC/radio intrusion detection system
US7119680B2 (en) 2003-12-11 2006-10-10 At&T Corp. FSOC/radio intrusion detection system
US7486186B2 (en) 2003-12-11 2009-02-03 At&T Intellectual Property, Ii, L.P. FSOC/radio intrusion detection system
US7980782B2 (en) 2004-07-30 2011-07-19 Astron Fiamm Safety S.P.A. Traffic safety integrated system, particularly in low visibility conditions and method of use of same

Also Published As

Publication number Publication date
GB8927405D0 (en) 1990-01-31
GB8828202D0 (en) 1989-01-05

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)