LIGHT SOURCE DEVICE AND PROJECTOR

摘要

Light source device includes a light source, a dichroic mirror that reflects the S-polarized light of light from light source, a condensing lens group that converges reflected light from the dichroic mirror, a phosphor unit movable so that light from a condensing lens group is sequentially radiated to a phosphor region and a reflection region, and a ¼ wavelength plate provided between the lenses of the condensing lens group.

主权项

1. A light source device comprising:
a light source that emits excitation light; a dichroic mirror that is configured to reflect or transmit first linearly polarized light of light from the light source; a first condensing lens group that includes a plurality of lenses and that is configured to converge reflected light or transmitted light from the dichroic mirror; a phosphor unit that includes a phosphor region in which a phosphor is provided and a reflection region in which incident light is reflected and that is movable so that light from the first condensing lens group can be sequentially radiated to the phosphor region and the reflection region; and a ¼ wavelength plate that is provided between two adjacent lenses from among the plurality of lenses, wherein each of the first condensing lens group and the phosphor unit is disposed so that fluorescent light emitted from the phosphor region and reflected light from the reflection region enter the dichroic mirror via the first condensing lens group and the ¼ wavelength plate.