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