LIGHT SOURCE DEVICE AND PROJECTOR

摘要

PROBLEM TO BE SOLVED: To provide a light source device which can improve utilization efficiency of light while suppressing dust adhesion on a surface of a phosphor layer.SOLUTION: A light source device 10 comprises: a wavelength conversion member 1 comprising a substrate which can rotate around a given rotating axis and a phosphor layer containing phosphor and fitted to the substrate; a light source 11; condensing optical systems 12 and 13 making excitation light emitted from the light source to be irradiated to be condensed to the phosphor layer; and a casing 16 with a sealed space 20 formed for housing the wavelength conversion member and blocking from outside.