OPTICAL DEVICE, LIGHTING DEVICE AND SYSTEM FOR LIGHTING CROWN COVER OF PLANTS Russian patent published in 2016 - IPC F21V5/04 F21V7/00 F21V7/09 F21Y101/02 

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. The first rational quadratic Bezier curve and the second quadratic Bezier curve are selected independently from each other and are placed so that optical device is asymmetric in regard to its central axis of rotation. Upon reflection in the first plane the received light is reflected in direction to the central axis and upon reflection in the second plane the received light is reflected in direction from the central axis thus ensuring asymmetric vertical distribution of intensity at output from the optical device so that in the preset area lighted under angle vertical and horizontal distribution of illumination is provided.

EFFECT: increased efficiency of crown cover of plants, which is attained due to the optical device (100) having the light input area (109) for receipt of light from the light source, the first surface (120) described by the first rational quadratic Bezier curve and the second surface (110) described by the second rational quadratic Bezier curve.

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