Heliostat

A Heliostat is a device that tracks the movement of the sun. It is typically used to orient a mirror, throughout the day, to reflect sunlight onto a target-receiver. Plastic or even steel can be melted if enough mirrors are aimed at one spot.Cost-effectiveness hinges on a simple question: Does the primary axis aim directly at the target-receiver? If not, the cost may be prohibitive.Mass-production will reduce costs, perhaps someday to as low as $18/sq.ft. of motorized mirror.
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(n.)
An instrument consisting of a mirror moved by clockwork, by which a sunbeam is made apparently stationary, by being steadily directed to one spot during the whole of its diurnal period; also, a geodetic heliotrope.
  

See coelostat .

opt. heliostat

heliostat
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