| 摘要 |
<p>This light source device comprises: a first solid-state light-emitting element (2) for emitting primary light; a first phosphor film (3) for absorbing the primary light and emitting secondary light; a prism (1) having an incidence surface (11) disposed along the first phosphor film (3) with air interposed therebetween, an inclined surface (12) facing the incidence surface (11) at an incline, two vertical surfaces facing the incidence surface (11) and the inclined surface (12) in a vertical and mutually parallel manner, an emission surface (13) continuous with the incidence surface (11), the inclined surface (12), and the two vertical surfaces at a side where the space between the incidence surface (11) and the inclined surface (12) is wide, the surface area of the emission surface being less than the surface area of the first phosphor film (3), and a narrow-angle surface (14) in a facing parallel arrangement with the emission surface (13); and a first secondary-light-reflecting film (4) for allowing the primary light to pass through while reflecting the secondary light, the first secondary-light-reflecting film being disposed between the first solid-state light-emitting element (2) and the first phosphor film (3).</p> |
