| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve irradiation efficiency, as well as restrain color shading, of a light source device with a lens and a lighting device equipped with the said light source device. <P>SOLUTION: The light source device 1 is provided with a light source part 2 irradiating light, a first transparent member 3 sealing the light source part 2, and a second member 4 formed on the first member 3 forming an interface with air and filling the role of a convex lens 5. An outer periphery 5c of the convex lens is formed further outside of a light axis A of the convex lens than a position P where an incident angle of the light irradiated from the light source part 2 toward an interface I2 forms a critical angle θc. With this structure, a ratio of light totally reflecting at the interface I2 is reduced to improve an irradiation efficiency of the light source device 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
