The development of a laser capable of seeing hidden objects from a mile away


Scientists in China have developed a laser that can locate a hidden object a mile away.Researchers concealed a plastic mannequin inside an apartment and fired a laser emitter at its location, then determined its location by calculating how long it took the photons to hit different parts of the room and back again.

According to the British newspaper “Daily Mail”, the army can use technology, known as (NLOS), to find enemy targets, or rescue teams to find victims.

This can also be useful in helping self-driving cars detect pedestrians and other vehicles from behind buildings.

A team from the China University of Science and Technology perfected the new technique, set up a laser emitter in Shanghai, then hid a mannequin behind a screen in an apartment about a mile away, and some of the photons from the laser smashed into the wall of the apartment and bounced directly to a sensor next to its emitter.

However, other particles collided with the crossbar and reflected back onto the wall of the apartment before returning to the sensor, and given the time it took for the photons to travel between different locations, they were able to see how far each mannequin part was placed from the wall and create an approximate 3D image of its location .

It is worth noting that previous experiments can only locate objects from about 10 feet away, because the particles in the air and lost environmental light confuse the sensors, and to overcome these obstacles, the new laser emitter used different telescopes that limited the interference of the signal.


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