title: Optical transmission filters for observation of lightning phenomena in the Earth atmosphere.
abstract: Very narrowband transmission filters, as parts of an instrument for the study of lightning phenomena, are described. Their performance must be maintained at an incidence angle of ±5.5° and this condition poses some limitations on the minimum bandwidth of the order of a few nanometers. The fabrication of such coatings on large area substrates is quite challenging because of the required thickness accuracy. Moreover, their performance should be not influenced by the environmental conditions in space.
authors: Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Rome, Italy. angela.piegari@enea.it
authors: Angela
authors: A
authors: Piegari
authors: Ilaria
authors: I
authors: Di Sarcina
authors: Maria Luisa
authors: ML
authors: Grilli
authors: Salvatore
authors: S
authors: Scaglione
authors: Anna
authors: A
authors: Sytchkova