Omnidirectional catadioptric lens structure
Abstract:
At least one lens element defines a cylindrical void that encloses a conical element having a conical mirror surface defined about a common vertical axis upward from a tip on a generally 45-degree angle to the vertical axis. The lens element(s) have cross-sectional shapes defined relative to a plane passing through the lens element and including the vertical axis, the cross-sectional shape constant in rotation about the vertical axis and imparting a generally toroid shape to the lens element(s) for capturing image information from a surrounding scene and translating the captured light into a horizontal projection is oriented toward the conical mirror surface, which reflects the projection 90 degrees vertically downward toward an image plane of a light sensitive sensor for generating a photographic representation of the surrounding scene.
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