For example, {HEAD ~ the infrared light source} 92 may be physically separated from {TAIL ~ the light source} 74 by superimposing the locator beam 90 onto the light from the light source 74 with a beam splitter and steering optics 
physically separated from
For example , { HEAD ~ the infrared light source } 92 may be physically separated from { TAIL ~ the light source } 74 by superimposing the locator beam 90 onto the light from the light source 74 with a beam splitter and steering optics
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL 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 OTH OTH OTH OTH