High pass optical filter

摘要: A microstructure device (10) having an array (21) of deep lamellar structures resembling parallel plates (20) has sharp high pass cut-off behavior associated with incident TE polarized radiation. When two such microstructures are disposed in orthogonal orientation, they act like a 2-D rectangular waveguides the determined by separation respective plates. Another embodiment present invention employs linear drive (30) to articulate coupled tune filter operative radiation relatively independent angle incidence. The finds application placed proximate focal plane sensitive material so that very resolution multispectral images may be generated. is articulated actuator (30), preselected frequency tuned imaging occurs technology employed, applications for remote sensing chemical agents, satellite surveys agricultural resources, meteorological conditions, or environmental quality. gas absorption cell, opposing IR source and detector tunable can used analysis.