title: Far-infrared filters utilizing small particle scattering and antireflection coatings.
abstract: High transmission, low pass scatter filters for blocking at wavelengths from 3.5 microm to 50 microm and singlelayer antireflection coatings for optical materials used in the 25-microm-300microm region of the spectrum are described. The application of both techniques to liquid-He-cooled filters permits the construction of efficient low pass and medium-width band pass filters for use throughout the far infrared.
authors.forename: K R
authors.initials: KR
authors.lastname: Armstrong
authors.forename: F J
authors.initials: FJ
authors.lastname: Low