Thin-film spatial filters.
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.
Moreno
Ivan
I
Unidad Academica de Fisica, Universidad Autonoma de Zacatecas, Zacatecas 98060, Mexico. morenoi@hotmail.com
Araiza
J Jesus
JJ
Avendano-Alejo
Maximino
M