Since heat is pumped from window 12 to cooling channel 46, {HEAD ~ the coolant} in {TAIL ~ cooling channel} 46 need not be maintained at a temperature below the target temperature of the skin, as is the case in the FIG 1 embodiment 
in
Since heat is pumped from window 12 to cooling channel 46 , { HEAD ~ the coolant } in { TAIL ~ cooling channel } 46 need not be maintained at a temperature below the target temperature of the skin , as is the case in the FIG 1 embodiment
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 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