In addition to light from the light source 74, the imaging optics 78 also receive a locator beam 90 from {HEAD ~ an infrared light source} 92 carried by {TAIL ~ a common substrate} 85 with the light source 74 
carried by
In addition to light from the light source 74 , the imaging optics 78 also receive a locator beam 90 from { HEAD ~ an infrared light source } 92 carried by { TAIL ~ a common substrate } 85 with the light source 74
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH