Patent ID: 8388193

Claim:
A lens for directing light from a light emitter in a preferential-side off-axial direction with respect to the emitter axis, comprising: an emitter-adjacent base end forming an opening around the emitter axis; an inner surface defining a void with a surrounding lateral surface formed about the emitter axis and extending from the opening to terminate at an end surface which has a substantially planar portion extending from the preferential side at least to near the emitter axis and extends away from the base end to a position farthest therefrom to meet the surrounding lateral surface across from the preferential side; an output-end surface transverse the emitter axis; and a total internal reflection (TIR) surface radially beyond the void and configured for directing light received from the inner surface of the void toward the output-end surface, whereby light from the emitter exits the output-end surface predominantly toward the preferential side.