| 主权项 |
1. A light-emitting diode lamp comprising:
an optically-transparent lens including a parabolic section, the parabolic section defined about an axis and having a focus, the parabolic section comprising:
a continuous surface traverse to the axis and extending from the axis to a periphery of the parabolic section at a first end of the parabolic section, anda channel extending along the axis at least partially inside the parabolic section at a second end of the parabolic section, the second end being substantially opposed to the first end; and a light-emitting diode assembly comprising a light-emitting diode and an optically-transparent dome, the light-emitting diode disposed in the channel at the focus of the parabolic section, the optically-transparent dome disposed in the channel such that an interior space is formed in the channel between the optically-transparent dome and the optically-transparent lens, the interior space filled with an optically-transparent material having an index of refraction approximately equal to an index of refraction of the optically-transparent lens which eliminates or reduces effect of an optical interface between the optically-transparent material and the optically-transparent lens on direction of light emitted by the light-emitting diode, the light-emitting diode configured to emit light such that first light rays of the light are internally reflected in the lens and collimated through the continuous surface, second light rays of the light are transmitted through the optically transparent lens and the continuous surface in parallel to the axis, and third light rays of the light are refracted by the continuous surface toward the axis. |
