Light converter emitting illumination light and light source apparatus using the light converter

摘要

A light source apparatus includes a light conversion unit converting primary light into secondary light. The light conversion unit includes a light conversion member, a holder and a reflection member. The holder includes an incidence portion through which the primary light enters and an exit portion through which at least part of the secondary light exits in a direction crossing an optical axis of the primary light. The light conversion member is arranged on the optical axis of the primary light. Part of the secondary light allowed to exit from the light conversion member in a direction different from a direction toward the exit portion is reflected by the reflection member and exited from the exit portion. The ratio of reentering to the light conversion member is reduced.

主权项

1. A light converter comprising:
a light guide member which guides a primary light emitted from a primary light source; and a light conversion unit that converts the primary light guided by the light guide member into secondary light having predetermined optical properties and allows illumination light including the primary light and the secondary light to exit therefrom, wherein the light conversion unit comprises: a light conversion member which converts the primary light into the secondary light and radiates the converted light; a holder which holds the light conversion member; and a reflection surface which reflects the secondary light, wherein the holder comprises: an incidence portion through which the primary light enters from the light guide member; and an exit portion through which at least part of the secondary light exits in a direction crossing an optical axis of the primary light that enters from the incidence portion, wherein an exit end of the light guide member is arranged without extending to an interior of the holder, wherein the light conversion member is arranged on the optical axis of the primary light that enters from the incidence portion, and the light conversion member and the incidence portion are arranged on the optical axis of the primary light and apart from each other in a direction of the optical axis, and wherein part of the secondary light allowed to exit from the light conversion member in a direction different from a direction extending to the exit portion is reflected by the reflection surface and allowed to exit from the exit portion to the outside without reentering the light conversion member, and part of the primary light which is not converted to the secondary light by the light conversion member is also reflected by the reflection surface and allowed to exit from the exit portion to the outside without reentering the light conversion member.