| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lens obtaining light distribution characteristics of a wide angle, with luminous intensity in an optical axis direction and that in a direction crossing the optical direction both high, and further, to reduce glare when an LED element is directly viewed through the lens. <P>SOLUTION: The lens 14 is provided with a first lens part 46 and a second lens part 48 which are integrally formed. The first lens part 46 is formed into a hemispherical shell shape including a first concave part 45 on which light is incident from a plane light source 34 and which opens to one side of an optical axis direction. The second lens part 48 is formed into a hemispherical shell shape including a second concave part 47 opening to the other side of the optical axis direction. Further, a surface texturing process for granting light diffusion characteristics is applied to the first lens part 46. <P>COPYRIGHT: (C)2013,JPO&INPIT |
