| 摘要 |
A lens has an optical body member with a first end, a second end, and an outer surface, the outer surface being shaped to provide total internal reflection. The optical body member further has an interior open channel extending longitudinally from the first end to the second end thereof. The optical body member further has a plurality of refractive surface regions disposed in the second end thereof and around the second opening of the interior open channel. The optical body member also has a plurality of protrusions extending from the first end of the optical body member. The protrusions are disposed circumferentially around the first opening of the interior open channel and are arranged to center the optical body member and to maintain the optical body member at a predetermined position with respect to the light source. In a light apparatus having an LED emitter disposed on a substrate, the protrusions can fit into notches in the substrate. |
