| 摘要 |
<p>A polymeric minus filter for an incident electromagnetic spectral band comprises at least one polymeric interference stack tuned to a predetermined design wavelength centered around g<4>, wherein g<4> is in the range of 300 nm to 2000 nm, said filter comprises an optically transparent substrate and having deposited thereon at ambient temperatures (20 to 23 DEG C) a multiplicity of pairs of polymeric thin interference layers plus one final polymeric layer having index of refraction n<6>, each pair of interference layers having a total optical thickness equal to 1/2 wavelength of g<4>, the members of each pair having refractive indices n<5> and n<6>, respectively, wherein the layer having refractive index n<6> is directly superimposed upon said substrate having refractive index ns and wherein ns is approximately equal to n<5>, and wherein n<6> < n<5>.</p> |
