Laser fence

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A laser fence or laser wall is a mechanism to detect objects passing the line of sight between the laser source and the detector. [1] [2] Stronger lasers can be used to injure entities passing the laser beam. [3] In fiction, laser fences may have the ability to stop intruders by blocking or injuring them.

Contents

Description

A laser fence mechanism detects objects passing the line of sight between a laser source and detector. [1] Stronger lasers can be used to injure entities passing the laser beam, as in a mosquito laser. [3] Fictional uses of laser fences often extend the concept so that fences may have the ability to prevent intruders by blocking or injuring them. [4] [5] [6] [7]

Agricultural usage

Lasers are used to keep birds from eating blueberries by being perceived as a predator. [8] The European Commission is funding research into a laser fence to scare away rats and other pests. [9] [10] [11]

Border fences

The Indian Border Security Force (BSF) has implemented a laser wall system—called LASER Wall—along some parts of its border to stop intrusion. [12]

In fiction

Films

In the 1992 film Fortress, prisoners are kept secured by laser walls. [4] In the 1995 film Congo, a laser fence is used as part of other high-tech equipment to defend a camp against vicious gorillas. [13]

Videogames

Laser walls appear frequently in videogames. [14] [15] [16] The concepts of these fictional fences can be compared to other concepts like tractor or repulsor beams and force fields.

See also

Notes

  1. 1 2 Steele, Richard K; Roudabush, Douglas E (23 July 1974). "Laser fence" – via United States Patent and Trademark Office.
  2. ↑ Thomas Petruzzellis (1994). The Alarm, Sensor & Security Circuit Cookbook. McGraw Hill Professional. p. 145. ISBN   978-0-8306-4314-1.
  3. 1 2 Guth, Robert A (2009). "Rocket Scientists Shoot Down Mosquitoes With Lasers". The Wall Street Journal.
  4. 1 2 Holden, Stephen (4 September 1993). "Review/Film; A Futuristic Prison That Demands Escape". The New York Times. Retrieved 11 May 2018.
  5. 1 2 Ingenito, Vince (19 August 2016). "Deus Ex: Mankind Divided Review".
  6. 1 2 "Monaco: What's Yours Is Mine (Game) - Giant Bomb". Giant Bomb.
  7. 1 2 "Short Supply - Sly Cooper: Thieves in Time Wiki Guide - IGN". IGN. 9 February 2013.
  8. ↑ "Laser bird deterrent increases crop revenue by 33%". www.laserfocusworld.com. 26 October 2017.
  9. ↑ "Laser fence aims to protect crops from rats and other pests". www.laserfocusworld.com. 28 October 2016.
  10. ↑ "LASER RAT FENCE wins €1.7m European Commission funds". The Register .
  11. ↑ Bapat, Varsha; Kale, Prasad; Shinde, Vijaykumar; Deshpande, Neha; Shaligram, Arvind (2017). "WSN application for crop protection to divert animal intrusions in the agricultural land". Computers and Electronics in Agriculture. 133: 88–96. Bibcode:2017CEAgr.133...88B. doi:10.1016/j.compag.2016.12.007. ISSN   0168-1699.
  12. ↑ "'Laser walls' activated along India-Pakistan border to plug gaps in vigil - Times of India". The Times of India . 28 April 2016.
  13. ↑ Toorek, Derick (20 August 2018). Congo (1995) - shootout scene in the woods (Videotape) – via YouTube.
  14. ↑ Rudolf Kremers (21 October 2009). Level Design: Concept, Theory, and Practice. CRC Press. pp. 362–. ISBN   978-1-4398-7695-4.
  15. ↑ "Laser Fence (Object) - Giant Bomb". Giant Bomb.
  16. ↑ Hayley Camille; James Floyd Kelly (16 October 2015). The Ultimate Player's Guide to Skylanders Trap Team (Unofficial Guide). Pearson Education. pp. 8–. ISBN   978-0-13-421619-5.
  17. ↑ "Chapter 8: Test Chamber 12 - Portal 2 Walkthrough". www.thonky.com. Retrieved 11 May 2018.
  18. ↑ Hamilton, Kirk. "The Mission That Proved Titanfall 2 Was Something Special". Kotaku. Retrieved 11 May 2018.
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