| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a side-emitting light-emitting devices which can be used with an optical guide and a reflector having an ultrathin cross-sectional form and/or a large illumination area. <P>SOLUTION: A lens comprises a bottom face, a reflecting surface, a first refracting surface obliquely angled with respect to a central axis of the lens, and a second refracting surface extending as a smooth curve from the bottom surface to the first refracting surface. Light entering the lens through the bottom surface and directly incident on the reflecting surface is reflected from the reflecting surface to the first refracting surface and refracted by the first refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens. Light entering the lens through the bottom surface and directly incident on the second refracting surface is refracted by the second refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens. The lens may be advantageously employed with LEDs, for example, to provide side-emitting light-emitting deices. A lens cap attachable to a lens is also provided. <P>COPYRIGHT: (C)2004,JPO |
