THE Pentagon is working on a laser dazzler that will force drivers to stop without harming their eyes.
When a vehicle approaches a checkpoint at speed, ignoring warning signs to slow down, troops do not know whether the driver is simply careless or a suicide bomber. They need a clear and harmless way of forcing drivers to stop.
Green designed to temporarily blind drivers were sent to US forces in Iraq and Afghanistan for just this purpose. But at short range they can damage the eye, and a number of US troops and civilians have ended up in hospital with eye injuries after 鈥渇riendly fire鈥� incidents.
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鈥淯S troops and civilians have been sent to hospital with eye injuries after 鈥榝riendly fire鈥� incidents鈥�
Now the US Department of Defense鈥檚 (JNLWD) in Quantico, Virginia is developing a pulsed laser designed to prevent eye damage. Its wavelength means a portion of the light is absorbed by the vehicle windscreen, vaporising the outer layer of the glass and producing a plasma. This absorbs the rest of the pulse and re-emits the energy as a brilliant white light that is dazzling but harmless.
Because the light is emitted from the windscreen, the effect on the driver鈥檚 eyes should be the same regardless of the vehicle鈥檚 distance from the laser.
Scott Griffiths of the JNLWD says it hopes to have a working prototype ready by next year.
