| 摘要 |
<p>A light emitter (40) for emitting partially collimated light in one or more selected directions. The light emitter has a longitudinally specularly reflective internal surface (50); and a light emitting area (48) having an inner portion (60) which is both partially longitudinally specular reflective and partially longitudinally transmissive and a refractive, prismatic outer portion (52).</p> |
