Soon cops' flashlights might not only temporarily blind bad guys: they might also stop them in their tracks by disorienting them and making them nauseatingly sick. When suspects turn away or reel, cops or border-security agents can nab and handcuff them.
The flashlight, which is being developed for the Department of Homeland Security (DHS), uses a range finder to measure the distance to the target's eyes so that it can adjust the energy of the light to a level that won't cause permanent damage. Then it rapidly shoots out pulses of light from an array of ultrabright light emitting diodes (LEDs).
The flashes incapacitate a person in two different ways, says Robert Lieberman, CEO of Intelligent Optical Systems, based in Torrance, CA, which is making the device. The flashes temporarily blind a person, as any bright light would, and the light pulses, which quickly change both in color and duration, also cause what Lieberman calls psychophysical effects. These effects, whose effectiveness depends on the person, range from disorientation to vertigo to nausea, and they wear off in a few minutes.
As you can see in the video, the biggest advantage of the Shockwave, meant for military checkpoints, is that you can be a crap shot and still lay out your enemy. Each unit fires six TASER cartridges, fanning out in a nightmarish 20-degree arc of electricity that's bound to hit something. That's what is called "area denial".