| 摘要 |
PROBLEM TO BE SOLVED: To provide a small, light and low-heat-generating solid lighting device facilitated in light control.SOLUTION: The solid lighting device includes a light source part, a light-guiding part, a heat-transmitting part, and an optical part. The light source part emits a plurality of laser beams in a wave range of bluish-violet to blue color. The light-guiding part guides a plurality of laser beams. The optical part is formed by laminating a first wave guiding path having a first wavelength-transforming layer, a second wave-guiding path having a second wavelength-transforming layer and set on the first wave-guiding path, and a third wave-guiding path set on the second wave-guiding path, and has a top surface, a side surface, and a bottom surface. A first laser beam irradiates the first wavelength-exchanging layer. A second laser beam irradiates the second wavelength-transforming layer. A third laser beam incomes to the third wave-guiding path. First wavelength-transformed light and second wavelength-transformed light having a wavelength shorter than that of the first wavelength-transformed light are emitted from the top surface. The third laser beam is transformed into scattering light and is emitted from the top surface. |
