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