Patent ID: 6392782
Filing Date: 2002-05-21
Classification: G01J,G02B

Abstract:
A device for selectively transmitting radiation therethrough to separate incident radiation for separate subsequent processing, said device being a periodic structure and comprising: a first set of metallo-dielectric photonic band gap (MD PBG) layers, said MD PBG layers being four in number and identical in composition and each MD PBG layer being comprised of a first germanium sublayer and a silver sublayer; a second set of dielectric-dielectric photonic band gap (DD PBG) layers, said DD PBG layers being five in number and identical in composition and each DD PBG layer being comprised of a magnesium floride sublayer and a second germanium sublayer, said first and second sets being in the proximity of each other; and a substrate, said substrate supporting said first and second sets, said sets co-operating with each other so as to transmit through said periodic structure a first incident radiation of 3-5 microns while reflecting a second incident radiation of 8-12 microns.