| 摘要 |
PURPOSE: A lighting device using a laser ray is provided to excite a fluorescent substance to the laser ray by using the laser ray having a small divergence angle as a light source. CONSTITUTION: A lighting device includes a light source(101) discharging a laser ray, and a focusing lenses(102) focusing the laser ray. The lighting device includes a fluorescence means(108) discharging spontaneous emission, and a parabolic reflector(103) reflecting the spontaneous emission between the focusing lenses and the fluorescence means. The divergence angle of the laser ray discharged from the light source is less than 2 mrad. The fluorescence means is formed by successively laminating a substrate(105), a reflecting layer(107), and a fluorescent layer(106) including a fluorescent substance. |
