{HEAD ~ The polarization direction} of S polarized light can be defined by {TAIL ~ the optical axis} of the illumination optical system and the polarization split film as the S polarization direction 
defined by
{ HEAD ~ The polarization direction } of S polarized light can be defined by { TAIL ~ the optical axis } of the illumination optical system and the polarization split film as the S polarization direction
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH