In {HEAD ~ another embodiment}, {TAIL ~ the passive variable emittance device} is adapted to be used as a temperature controlled optical switch 
In { HEAD ~ another embodiment } , { TAIL ~ the passive variable emittance device } is adapted to be used as a temperature controlled optical switch
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH