abstract maths paves way for better lasers - laser pointer measuring device

Physicists working at the universities of Bristol, Glasgow and Southampton have "tied together" the light ".
Control the light with holographic photography specially designed with "Knot theory-
A branch of abstract mathematics, inspired by twists and turns of shoelaces and ropes.
This breakthrough paved the way for the accuracy of laser technology to reach a new level, with applications ranging from traffic speed guns to height measurements.
Dr. Mark danness of the University of Bristol said: "In the beam, the flow of light through space is similar to the flow of water in the river.
"Although it often flows in a straight line --
Take out the torch, laser indicator, etc-
Light can also flow in rotation and vortex, forming lines in space called "optical vortex.
"Along these lines or optical swirls, the intensity of the light is zero (black).
"The light around us is filled with these dark lines, even though we can't see them.
"The group was able to create knots in optical swirls, using complex holographic photography to guide the flow of light," said Dr. nice, lead author of the paper published in the journal Nature Physics.
This study shows the physical applications of branches of mathematics that were previously considered completely abstract.
Professor Miles padit of the University of Glasgow, who led the experiment, said: "The complex holographic design required for the experimental demonstration of knotted light shows advanced optical control, this can undoubtedly be used in future laser devices.
Dr. dennice added: "In 1867, Lord Kelvin began his research on knotted swirls as he sought an explanation of the atom.
This work opens a new chapter in this history.