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GOLD’s coating and testing facilities for ISSIS-WSO  
Descripción:
Abstract ISSIS imager has been thought as an open purpose instrument within the World Space Observatory (WSO) international space mission. The highest priorities of ISSIS, an instrument to be developed by Spain, are to guarantee high spatial resolution and high sensitivity down to the far ultraviolet (FUV). The paper displays the capacities of GOLD for multilayer deposition and FUV reflectometry, among other metrologies, for ISSIS optical elements. Deposition of coatings for ISSIS–WSO will be carried out in a new UHV system with a 75-cm diameter deposition chamber. The purpose of the new laboratory is the deposition of coatings satisfying the constraints for FUV space optics. The first target coating to be developed in this new laboratory
is Al protected with MgF2, with optimum reflectance down to ∼120 nm. GOLD’s existing reflectometer is able to characterize flat pieces both by transmittance and reflectance, and the latter from near-normal to grazing incidence, in the range from 12 to 200 nm. Other metrologies that will be available at GOLD for ISSIS’s coatings and filters include optical thickness of filters to assure parfocality, filter wedge, and coating and filter scattering.
Keywords Coatings · Multilayers · Far ultraviolet ·
Reflectance measurement · Filters · Space optics 

Año de Publicación:    2011
Referencia:    "GOLD’s coating and testing facilities for ISSIS-WSO" Juan I. Larruquert; José Antonio Méndez; José Antonio Aznárez; Manuela Vidal-Dasilva; Sergio García-Cortés; Luis Rodríguez-de Marcos; Mónica Fernández-Perea Astrophys Space Sci (2011) 335:305–309 DOI 10.1007/s10509-011-0666-1
Revista:    Astrophys and Space Science
 
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