{HEAD ~ The method} 20, comprising reducing {TAIL ~ the external reflectance} of the passive top multilayer stack with at least one absorption layer group in said top multilayer stack 
{ HEAD ~ The method } 20 , comprising reducing { TAIL ~ the external reflectance } of the passive top multilayer stack with at least one absorption layer group in said top multilayer stack
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH