Patent ID: 8690368

Claim:
A light guide comprising: an at least partially translucent light transmitting plate having an upper surface, a lower surface and side surfaces, said light transmitting plate being substantially hard and non-deformable; one or more light transmitting cavities projecting into said lower surface of said plate, said one or more cavities each having an arcuate dome-shaped sidewall so that said cavities are hemispherical or hemi-ellipsoid in shape, said sidewall of said one or more cavities forming one or more plate-cavity interfaces; a reflector covering at least a portion of said plate's lower surface and said one or more cavities; and a light source for communicating light through said plate; said one or more interfaces being at least partially translucent for allowing light transmitted through said plate to refract through said interface into said cavity, and said cavity being at least partially translucent to permit light refracted into said cavity to reflect off said reflector to again refract through said interface to travel upwardly through said plate to transmit light from said plate's upper surface.