| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a collimator lens having high collimation converting efficiency, and to provide a planar low-profile light emitting device using such an arrayed light source optical element. <P>SOLUTION: The arrayed light source optical element 3a comprises a rod-shaped optical element 11, and a light guide 14 as a rod-shaped part formed at the side of an incident portion of the optical element 11 and having a total reflection portion for totally reflecting light having a predetermined angle or greater around the optical axis plane of the optical element 11 out of emitted light from a plurality of LEDs 12 linearly or annularly arranged toward a plurality of uneven reflecting portions 14b provided between the adjacent LEDs 12, for guiding light reflected from the plurality of the uneven reflecting portions 14b and smaller-than-the-predetermined-angle light out of the emitted light to the incident portion of the optical element 11. <P>COPYRIGHT: (C)2010,JPO&INPIT |
