Harnessing the Sun

Heliostats are a simple and bright way of redirecting reflected sunshine into buildings for use as lighting

A sunny morning at the new Haus der Forschung in Vienna brings more than another day’s work. Through a system of mirrors, prisms, and fiber cables, sunlight itself is funneled into the foyer. Snaking through the Forschung ceiling is the latest experiment in heliostatic lighting—bringing the sun inside the building.

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