| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve an illumination quality by restricting variation in illumination intensity distribution on a surface to which light has been emitted. <P>SOLUTION: The light incident surface part 7 of a luminous flux control member 4 reflects light from a light emitting element 3 in a direction substantially along an optical axis L, thereby making the light incident on it. Most of light incident from the light incident surface part 7 is totally reflected by a light reflection surface part 11. The light reflected by the light reflection surface part 11 is emitted in a sidewise direction of the luminous flux control member 4 from the first emission surfaces 17a and 17b and second emission surfaces 18 of a light emission surface part 12. Even in the case where a plurality of light emitting devices 1 with such a luminous flux control member 4 are densely arranged in one line, light traveling toward the luminous flux control member 4 of adjacent one of the densely arranged light emitting devices 1 can be restricted by the first emission surfaces 17a and 17b of the light emission surface part 12, and light beams are prevented from illuminating right above the arrangement of the light emitting devices 1 in an overlapping manner. Accordingly, an illumination intensity value right above the arrangement of the light emitting devices 1 can be made substantially uniform. <P>COPYRIGHT: (C)2013,JPO&INPIT |
