The associated optics of light source 314 may collimate the light, and measure off {HEAD ~ axis scatter}, such as {TAIL ~ SALS} and FALS scatter 
such as
The associated optics of light source 314 may collimate the light , and measure off { HEAD ~ axis scatter } , such as { TAIL ~ SALS } and FALS scatter
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH