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