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A 30-cm objective grating for far-UV astronomy: theoretical study and laboratory tests.
Appl Opt ; 28(3): 496-509, 1989 Feb 01.
Article em En | MEDLINE | ID: mdl-20548509
We have performed theoretical determination and experimental calibrations of an objective grating designed for high resolution spectroscopy of astronomical faint sources in the EUV and far-UV wavelength ranges (500-1400 A). First through theoretical calculations we show the feasibility of the concept with an aspheric shape for the grating blank and determine its geometrical parameters. A grating of this large size has been manufactured and tested, associated with a photon counting detector, in a vacuum environment. Finally we demonstrate that a resolving power of 3 x 10(4), a total equivalent effective area of ~5-10 cm(2) can be achieved, together with a very low scattered light level (10(-4)-10(-5) of the peak value).

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Appl Opt Ano de publicação: 1989 Tipo de documento: Article País de publicação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Appl Opt Ano de publicação: 1989 Tipo de documento: Article País de publicação: Estados Unidos