Patent ID: 8182118

Claim:
A lens assembly, comprising: an optical body member having a first end, a second end opposite the first end, and an outer surface, the optical body member being substantially symmetric with respect to an optical axis, the outer surface being shaped to provide total internal reflection for light from a light source having a specified position in relation to the first end, the optical body member further having an interior open channel extending longitudinally from the first end to the second end thereof, the interior open channel being substantially symmetric with respect to the optical axis, the interior open channel having a first opening at the first end for accommodating the light source and a second opening at the second end, the optical body member further having a plurality of curved refractive surface regions disposed in the second end thereof and around the second opening of the interior open channel, the second end including a peripheral flange that is free of curved refractive surface regions, the peripheral flange having one or more index regions and one or more notches formed therein; and a substantially cylindrical support member having a hollow interior region shaped to accommodate the optical body member and a top rim region having one or more slots for receiving the index regions of the optical body member and one or more snap clips for fitting to the notches of the peripheral flange region of the optical body member and thereby retaining the optical body member, the support member being adapted for centering the optical body member and maintaining the light source at a predetermined position with respect to a the optical body member.