What follows is an excerpt from Ryan Pickrell's 6-27-19 Business Insider article entitled "This U.S. Military Laser Can Identify People By Their Heartbeats From 650 Feet Away":
as everyone has unique fingerprints, everyone also has a unique
heartbeat, and that concept is crucial to the US military's newest
Department of Defense, at the request of US special operations forces,
used this principle to develop an infrared laser that can identify enemy
combatants from a distance by reading their cardiac signature, the MIT
Technology Review reported Thursday, citing Pentagon officials.
as the US military's new device is called, uses laser vibrometry
(non-contact vibration measurements) to detect surface movement caused
by a person's heartbeat. The device is an extension of existing
technology, such as already available equipment for measuring vibrations
in distant structures like wind turbines.
laser is reportedly able to penetrate clothing and achieve a positive
identification roughly 95 percent of the time from up to 200 meters
away, or about 650 feet, and there is the real possibility that the
range could be extended.
don't want to say you could do it from space, but longer ranges should
be possible." Steward Remaly, a defense official in the Pentagon's
Combatting Terrorism Technical Support Office, told MIT Technology
technology is still in its early stages. The laser device can't
penetrate thick clothing and the person must be sitting or standing in
one place for it to work. It takes about 30 seconds to get a reading.
And then there is a need for the creation of a cardiac signature database....