Hi Tech & Innovation

Replacing driver hand gestures with holography

How do you decide whether a pedestrian needs to wait or it's safe to cross the road in front of a car? In today's world, drivers and pedestrians simply exchange a brief eye contact or small hand gestures to express their ...

Engineering

Smart window—augmented reality for tomorrow's ship management

The precisely transmitted image of the quay wall on the ship's window of the steering bridge, provided with some additional information, for example on current conditions and mooring possibilities—even in fog, darkness ...

Robotics

A fairy-like robot flies by the power of wind and light

The development of stimuli-responsive polymers has brought about a wealth of material-related opportunities for next-generation small-scale, wirelessly controlled soft-bodied robots. For some time now, engineers have known ...

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Laser

A laser is a device that emits light (electromagnetic radiation) through a process called stimulated emission. The term laser is an acronym for light amplification by stimulated emission of radiation. Laser light is usually spatially coherent, which means that the light either is emitted in a narrow, low-divergence beam, or can be converted into one with the help of optical components such as lenses. Typically, lasers are thought of as emitting light with a narrow wavelength spectrum ("monochromatic" light). This is not true of all lasers, however: some emit light with a broad spectrum, while others emit light at multiple distinct wavelengths simultaneously. The coherence of typical laser emission is distinctive. Most other light sources emit incoherent light, which has a phase that varies randomly with time and position.

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