title: High-performance infrared narrow-bandpass filters for the Indian National Satellite System meteorological instrument (INSAT-3D).
abstract: This paper describes the design and manufacture of a set of precision cooled (210 K) narrow-bandpass filters for the infrared imager and sounder on the Indian Space Research Organisation (ISRO) INSAT-3D meteorological satellite. We discuss the basis for the choice of multilayer coating designs and materials for 21 differing filter channels, together with their temperature-dependence, thin film deposition technologies, substrate metrology, and environmental durability performance.
authors.affiliation: The University of Reading, Infrared Multilayer Laboratory, School of Systems Engineering, Whiteknights, Reading, Berkshire, RG6 6AY, England, United Kingdom. g.j.hawkins@reading.ac.uk
authors.forename: G J
authors.initials: GJ
authors.lastname: Hawkins
authors.forename: R E
authors.initials: RE
authors.lastname: Sherwood
authors.forename: B M
authors.initials: BM
authors.lastname: Barrett
authors.forename: M
authors.initials: M
authors.lastname: Wallace
authors.forename: H J B
authors.initials: HJ
authors.lastname: Orr
authors.forename: K
authors.initials: K
authors.lastname: Matthews
authors.forename: S
authors.initials: S
authors.lastname: Bisht