| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting device capable of supplying a required light volume for a given range. <P>SOLUTION: In the lighting device, a concave reflector 2 is arranged in a cylindrical case 1, a substrate 4 with an LED chip 3 mounted is fixed at a center part of the concave reflector 2, a porous plate 5 for removing high-temperature air in the case 1 is mounted on a rear-face side of the substrate 4, a convex lens 6 is mounted at an opening part of the concave reflector 2, and further, a concave lens unit 7 consisting of a linear Fresnel lens 7a inside and a concentric Fresnel lens 7b outside are mounted at a front-face opening of the case 1. <P>COPYRIGHT: (C)2013,JPO&INPIT |
