| 摘要 |
PROBLEM TO BE SOLVED: To provide a lightguide capable of optimally uniformly illuminating a symbol structure though the symbol structure to be illuminated is of complex. SOLUTION: The lightguide has a shape essentially being an S shape and having an inflated body when observed from a light-inflowing opening section to a light-outflowing opening section. Based on the shape, the lightguide is constituted in such a way that light emitted from a light source is converted and is made to flow toward an observer in a close observation direction at a desired predetermined angle. An additional dispersion focus 10 is housed in the lightguide 1. COPYRIGHT: (C)2003,JPO
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