wherein a cross point is an intersection point of {HEAD ~ an optical axis} of {TAIL ~ the illumination optical system} and the reflective liquid crystal display 
of
wherein a cross point is an intersection point of { HEAD ~ an optical axis } of { TAIL ~ the illumination optical system } and the reflective liquid crystal display
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH