A field of view of {HEAD ~ the image detecting module} covers the third light guide component and {TAIL ~ the fourth light guide component} 
A field of view of { HEAD ~ the image detecting module } covers the third light guide component and { TAIL ~ the fourth light guide component }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL