The optical lens 30 includes {HEAD ~ a beam splitter} arranged between the imaging device 20 and {TAIL ~ the first imaging lens} 40 that the image beam C from the imaging device 20 may emit through the optical lens 30 
arranged between
The optical lens 30 includes { HEAD ~ a beam splitter } arranged between the imaging device 20 and { TAIL ~ the first imaging lens } 40 that the image beam C from the imaging device 20 may emit through the optical lens 30
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH TAIL 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