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