Patent ID: 8702292

Claim:
An illumination device comprising: an illumination module comprising at least one light-emitting diode (LED) having a lens; disposed in contact with the illumination module, a light guide having (i) an inlet region for receiving light from the at least one LED, (ii) a collimation region for collimating the received light, and (iii) an emission region for emitting the collimated light to an ambient, the emission region having first and second opposed surfaces through at least one of which light is emitted, wherein (i) a shape of the inlet region is nonplanar and substantially complementary to a shape of the LED lens, such that substantially all light emitted through the LED lens strikes the inlet region at an angle perpendicular to a surface of the inlet region, and (ii) a shape of the collimation region is parabolic with an axis bisecting the parabola non-parallel with respect to both the first and second surfaces of the emission region, thereby increasing an amount of the collimated light propagating from the collimation region that strikes the first or second surface of the emission region without intervening reflection.