| 摘要 |
According to the present invention, in an illumination device (1), blue laser light from a semiconductor laser (11) is incident on a ceramic phosphor (13) and illumination light is emitted. The incidence surface and the side surface of the ceramic phosphor (13) are covered by a band pass filter (131). The ceramic phosphor (13) is held so as to be sandwiched by sapphire holding plates (231). Heat generated in the ceramic phosphor (13) is efficiently removed by the holding plates (231). The band pass filter (131) reflects fluorescent light generated in the ceramic phosphor (13) and guides the fluorescent light to the emission surface. Pseudo white light is obtained as illumination light from the laser light and the fluorescent light. The band pass filter (131) makes it possible to efficiently obtain appropriate emission light from the ceramic phosphor (13). |
