| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting device capable of realizing high ceiling illumination without installing a lamp and a power source at a high place. <P>SOLUTION: A diffusion-reflecting means 7 diffuses and reflects excitation light from a solid light source 5 to a wavelength selecting means 8; the wavelength selecting means 8, while reflecting the excitation light diffused and reflected by the diffusion-reflecting means 7 toward a phosphor layer 2, transmits fluorescent light emitted from the phosphor layer 2; the phosphor layer 2 reflects the fluorescent light toward the wavelength selecting means 8 by a reflection method and makes it transmitted through the wavelength selecting means 8, and takes it out; and the wavelength selecting means 8 has a parabolic curve shape having a focal point on the diffusion-reflecting means 7. <P>COPYRIGHT: (C)2013,JPO&INPIT |
