| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable to irradiate highly efficiently condensed light in a required range without color unevenness and light volume unevenness of irradiation light on an irradiated surface without largely changing central luminosity. <P>SOLUTION: The lighting system 1 is provided with: an LED element 2; a condensing translucent member 3 covering a light-emitting part of the LED element 2, condensing emission light from the light-emitting part 2b in a narrow angle and emitting the light outside; and a light path conversion part 4 fitted on either a surface of the condensing translucent member 3 or a surface of the translucent member 5 arranged on the emission side of the condensing translucent member 3, and structured of a plurality of convex forming parts 40 arranged in an emission direction, divided into a plurality of fan shapes toward an emission direction from an optical axis O on a plane cut in a direction crossing the optical axis O, and having a hemispherical shape with a radius r of 100 to 800 μm for every divided range 4a to 4h with a protrusion dimension h from a plane 3A of 1/30r to 1/3r, and formed in a convex shape. <P>COPYRIGHT: (C)2012,JPO&INPIT |
