Laser fence

A laser fence is a mechanism to detect objects passing the line of sight between the laser source and the detector.^[1] Stronger lasers can potentially be used to injure someone or something passing the laser beam (see mosquito laser^[2]).

Sometimes laser fences are used in fiction with the ability to stop intruders by blocking or injuring them.^{[citation needed]}

The Indian Border Security Force (BSF) has implemented a LASER wall system, called Farheen LASER Wall, along some parts of its border to stop intrusion. ^[3]

It is a concept used frequently in videogames.^[4] The concepts of these fictional fences can be compared to other concepts like tractor or repulsor beams.

Notes

^ http://www.freepatentsonline.com/3825916.html^{[dead link]} accessed 26 Jan 2011
^ Guth, Robert A (2009). "Rocket Scientists Shoot Down Mosquitoes With Lasers". Wall St. Journal. {{cite journal}}: Invalid |ref=harv (help)
^ BSF putting laser wall to fill gaps along Indo-Pak border - timesofindia-economictimes
^ Laser Fence (video game concept)^{[dead link]}

[1] ttp://www.freepatentsonline.com/3825916.html^{[dead link]} accessed 26 Jan 2011

[2] Guth, Robert A (2009). "Rocket Scientists Shoot Down Mosquitoes With Lasers". Wall St. Journal. {{cite journal}}: Invalid |ref=harv (help)

[3] BSF putting laser wall to fill gaps along Indo-Pak border - timesofindia-economictimes

[4] Laser Fence (video game concept)^{[dead link]}

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