Lyall Watson

Laboratory demonstration of Gabor's work only occurred years later following invention of the laser.

As biologist Lyle Watson explains, the purest kind of light available to us is that produced by a laser, which sends out a beam in which all of the waves are on one frequency, like those made by an ideal pebble in the perfect pond.

When two laser beams touch, they produce an interference pattern of light and dark ripples that can be recorded on a photographic plate.

And if one of the beams, instead of coming directly from the laser, is reflected first off an object, such as a human face, the resulting pattern will be very complex indeed, but it can still be recorded.

Laboratory demonstration of Gabor's work only occurred years later following invention of the laser.

As biologist Lyle Watson explains, the purest kind of light available to us is that produced by a laser, which sends out a beam in which all of the waves are on one frequency, like those made by an ideal pebble in the perfect pond.

When two laser beams touch, they produce an interference pattern of light and dark ripples that can be recorded on a photographic plate.

And if one of the beams, instead of coming directly from the laser, is reflected first off an object, such as a human face, the resulting pattern will be very complex indeed, but it can still be recorded.