EXCITATION LIGHT SYNTHESIZING UNIT, LIGHT SOURCE UNIT, AND PROJECTION-TYPE DISPLAY APPARATUS

摘要

An excitation light synthesizing unit includes a polarization splitter film, first and second ¼ wavelength plates, and a reflection member. The polarization splitter film transmits excitation light that is P-polarized light while reflecting excitation light that is S-polarized light. First and second ¼ wavelength plates are arranged on the path along which first excitation light, which is directed toward the polarization splitter film, travels. The reflection member disposed between first and second ¼ wavelength plates. The reflection member reflects second excitation light incident via the polarization splitter film toward the polarization splitter film. The reflection member includes a hole formed to pass the first excitation light.

主权项

1. An excitation light synthesizing unit comprising:
a polarization splitter film transmitting excitation light that comprises P-polarized light while reflecting excitation light that comprises S-polarized light; first and second ¼ wavelength plates arranged on a path along which first excitation light, which is directed toward the polarization splitter film, travels; and reflection member disposed between the first and second ¼ wavelength plates, the reflection member being reflecting second excitation light incident via the polarization splitter film toward the polarization splitter film while transmitting the first excitation light.