By: William Pentland
Forbes.com
Snipers equipped with today’s most advanced high-caliber rifles can send lethal payloads over distances of up to two miles. But long-distance extreme sniping of this sort is usually beyond the abilities of even the most talented marksman. Small barrel disruptions can cause even the most-skilled marksman to miss by wide margins. A new technology developed at Oak Ridge National Laboratory in Tennessee may remove that limitation with lethal results.
A fiber-optic, laser-based sensor system, the Reticle Compensating Rifle Barrel Reference Sensor, automatically corrects for even tiny barrel disruptions. The system uses a combination of algorithms, optics and additional sensor inputs to adjust targeting for distance and other factors affecting the bullet trajectory. The new system is 250 performs with a level of precision 250 times high than traditional sensors.
“When a weapon is sighted in, the aim point and bullet point of impact coincide,” said Slobodan Rajic, who led the research team that developed the system. “However, in the field, anything that comes into contact with the barrel can cause perturbation of the barrel and induce errors.”
Here is how it works:
The sensor measures the deflection of the barrel relative to the sight with extreme precision and electronically realigns the crosshairs with the true position of the barrel. The typical barrel of a high-power rifle has exterior grooves, called flutes, to reduce weight and create more surface area to enable the barrel to cool faster. The barrel heats up as a result of the hot expanding gases in the barrel and the friction from the bullets that are propelled by these hot gases along a helical path inside the barrel. The new technology places glass optical fibers, which contain a laser diode that sends a signal beam into the optical, into the flutes.
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