| 摘要 |
<p> In this light source device (1), a controller sets the energy density of laser light (L) in an illumination start region (RS) during laser support light maintenance so as to be lower than the energy density of laser light (L) in the illumination start region (RS) during laser support light illumination. Therefore, during laser support light maintenance, laser light (L) is beamed onto the illumination start region (RS) at an energy density at which sputtering does not occur. Therefore, in this light source device (1), sputtering in an emission sealed body (11) can be inhibited, making it possible to sufficiently extend the lifespan.</p> |
