wherein {HEAD ~ the optical axis} of {TAIL ~ the illumination optical system} is inclined with respect to the polarization split film 
wherein { HEAD ~ the optical axis } of { TAIL ~ the illumination optical system } is inclined with respect to the polarization split film
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH