Moreno Ivan, Araiza J Jesus, Avendano-Alejo Maximino
Unidad Academica de Fisica, Universidad Autonoma de Zacatecas, Zacatecas 98060, Mexico.
Opt Lett. 2005 Apr 15;30(8):914-6. doi: 10.1364/ol.30.000914.
A thin-film optical filter used as a one-dimensional spatial filter is presented, and its design is briefly examined. The filter consists of a stack of quarter-wave dielectric layers upon a right-angle prism that selectively cancel a reflected or transmitted plane-wave front for various angles of incidence. Transmittance and reflectance are low-pass functions or high-pass functions of the angle of incidence with a high degree of steepness. In combination, these filters exhibit bandpass transmittance with a variable bandwidth. Applications to detection of extrasolar planets are briefly discussed.
