In one embodiment, {HEAD ~ the exposure period} of {TAIL ~ laser} 177 is set by observing the physical effects of the infrared light on a test suspension 14 
of
In one embodiment , { HEAD ~ the exposure period } of { TAIL ~ laser } 177 is set by observing the physical effects of the infrared light on a test suspension 14
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH