India Installs 'Laser Walls' At Border With Pakistan (nbcnews.com)

schwit1 writes: After experimenting with barbed wire, surveillance cameras and even cowbells and camels, India has now reportedly introduced "laser walls" at its border with archenemy Pakistan. Both New Delhi and Islamabad deploy more than half of their 1 million and 600,000-strong armies, respectively, on the border. India is setting up the laser walls to "plug the porous riverine and treacherous terrain and keep an effective vigil against intruders and terrorists" in Punjab state, the state-run Press Trust of India reported. According to the PTI report, around 45 laser walls will be installed in Punjab state. Lasers beamed over rivers and hills will set off an alarm and alert the Indian Border Security Force if someone attempts to pass by, it added.

Comments

Wagash

[Bruce Perens]

Can't ever discuss these two without bringing up the Wagash ceremony.

Re:I've seen Mission Impossible...

[Locke2005]

If they use the same techniques used in laser surveying equipment, they would be able to detect a change in the length of the beam path. However, I suspect that would be really pricey. I assume the actually transmit a modulated signal instead of a constant beam, so you can't fool it just be flooding the receiver with light. I still think digging a trench and driving under the beam is the easiest way to sneak across. But then, the question is, why use laser beams at all, instead of IR cameras with motion detection? Technology to recognize movement in a video image has been around for at least 35 years, since I maintained a system used on the Alaska Pipeline to monitor pumps for failure 35 years ago.