Importance

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Abstract

A tunable optical metasurface may be steered to various steering angles. The field of view (FOV) in a first steering direction may be limited by the performance of an optically transparent cover of the metasurface and/or an anti-reflective coating applied thereto. Although the metasurface itself may be steerable to angles outside of the FOV, the transmissivity may be below an acceptable transmittance value. A biconic freeform optic is positioned within the optical path of the metasurface to expand the effective FOV. In some examples, the biconic freeform optic includes a concave first surface located nearest to the metasurface and a biconic second surface. The biconic second surface of the metasurface has a first radius of curvature along the first steering direction and a second radius of curvature along the non-steering direction or second steering direction.

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First Claim