In order to prevent spurious radiation from reaching the detector in the reflectance mode, any optical element which shapes or directs the radiation path on {HEAD ~ its way} from {TAIL ~ the beam dividing mirror} to the sample should be a fully reflecting surface, rather than a transparent lens 
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In order to prevent spurious radiation from reaching the detector in the reflectance mode , any optical element which shapes or directs the radiation path on { HEAD ~ its way } from { TAIL ~ the beam dividing mirror } to the sample should be a fully reflecting surface , rather than a transparent lens
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 HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH