{HEAD ~ The present invention} relates to the field of variable emittance devices, and more particularly to {TAIL ~ passively variable emittance devices} 
relates particularly to
{ HEAD ~ The present invention } relates to the field of variable emittance devices , and more particularly to { TAIL ~ passively variable emittance devices }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL