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