| 摘要 |
<p>This disclosure provides systems, methods and apparatus for an illumination system. In one aspect, the illumination system is a light guide (101) that includes spaced-apart regions of medium (205a, 205b, 205c and 205d) containing diffractive features. For example, the medium may include holographic medium having holograms that are configured to redirect light (140), propagating through the light guide (101), out of the light guide (101). The spaces (209a, 209b, 209c and 209d) between the spaced-apart regions of media (205a, 205b, 205c and 205d) may be filled with a material having a lower refractive index than the light guide, thereby functioning as a reflective cladding in those spaces.</p> |
