Detecting out of sight objects

Non-destructive testing

Researchers have developed a system using a camera that can freeze light in motion. The speed of this camera gives it a crucial advantage over conventional cameras. It is so fast that it can record ‘when’ light arrives at its sensor, not just ‘where’.

How do we detect out of sight objects?

Generally, clear imaging relies on a direct line of sight between the object and the camera. However, if you point a laser at the ground in front of you, you will notice how the light scatters in all directions – including around corners, or, it might even hit an out-of-view object.

Researchers have developed a system using a camera that it can freeze light in motion. The speed of this camera gives it a crucial advantage over conventional cameras. It is so fast that it can record ‘when’ light arrives at its sensor, not just ‘where’. With this timing information, the camera can make images in very unconventional ways. No longer does an object have to be in the field of view to be in the picture. This camera can see an object hidden around a corner or make an image of something embedded within or behind a wall. Currently, researchers are able to detect objects 2 to 3 metres around a corner.