Or`o*he"li*o*graph (?), n. [Gr. &?; mountain + helio- + -graph.] (Photog.)

A camera for obtaining a circular panoramic view of the horizon. The photographic plate is placed horizontally with a vertical lens above. A mirror of peculiar shape reflects light from the entire horizon to the lens, by means of which it is focused upon the plate.


© Webster 1913

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