US Patent No. 9,651,216

LIGHTING SYSTEMS INCLUDING ASYMMETRIC LENS MODULES FOR SELECTABLE LIGHT DISTRIBUTION


Patent No. 9,651,216
Issue Date May 16, 2017
Title Lighting Systems Including Asymmetric Lens Modules For Selectable Light Distribution
Inventorship Elizabeth Rodgers, Long Beach, CA (US)
Don Peifer, Mountain View, CA (US)
Raghuram L. V. Petluri, Cerritos, CA (US)
Paul Pickard, Acton, CA (US)
Robert Fletcher, Pasadena, CA (US)
Edward R Adams, Englewood, TN (US)
Assignee ECOSENSE LIGHTING INC., Los Angeles, CA (US)

Claim of US Patent No. 9,651,216

1. A lighting system, comprising:
a lighting module including a semiconductor light-emitting device configured for emitting light emissions along a central
light emission axis;

a first lens module including a first converging lens, the first converging lens being configured for causing convergence
of some of the light emissions of the semiconductor light-emitting device to form converged light emissions along the central
light emission axis having a first half-width-half-maximum (HWHM), the first converging lens having a first light output surface
being spaced apart along a first lens axis from a first light input surface, the first converging lens further having a first
total internal reflection side surface being spaced apart around the first lens axis and having a first frusto-conical shape
extending between the first light input and output surfaces of the first converging lens;

a second lens module including a second converging lens, the second converging lens being configured for causing convergence
of some of the light emissions of the semiconductor light-emitting device to form converged light emissions along the central
light emission axis having a second HWHM being different than the first HWHM, the second converging lens having a second light
output surface being spaced apart along a second lens axis from a second light input surface, the second converging lens further
having a second total internal reflection side surface being spaced apart around the second lens axis and having a second
frusto-conical shape extending between the second light input and output surfaces of the second converging lens; and

a third lens module including a first diverging lens having a third lens axis, the first diverging lens being configured for
causing divergence of some of the converged light emissions away from the third lens axis, the third lens module including:

a lens body having a light output surface spaced apart along a light transmission axis from a light input surface, the lens
body having a longitudinal axis and a lateral axis, the longitudinal and lateral axes being transverse to the light transmission
axis; the light output surface having an asymmetric curvilinear contour being formed by a convex region overlapping in directions
along the lateral axis with a concave region, the asymmetric curvilinear contour uniformly extending in directions along the
longitudinal axis;

wherein the lighting system is configured for detachably installing the first lens module or the second lens module in the
lighting module between the semiconductor light-emitting device and the third lens module; and wherein the lighting system
is configured for aligning the first or second lens axis with the central light emission axis and the third lens axis.