NDLI: Recent progress on 2012 sat for uvoir coatings

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Recent progress on 2012 sat for uvoir coatings

Content Provider	NASA Technical Reports Server (NTRS)
Author	Quijada, Manuel A. Rice, Stephen H. Del Hoyo, Javier G.
Copyright Year	2014
Description	Astronomical observations in the Far Ultraviolet (FUV) spectral region are some of the more challenging due to the very distant and faint objects that are typically searched for in cosmic origin studies such as origin of large scale structure, the formation, evolution, and age of galaxies and the origin of stellar and planetary systems. These challenges are driving the need to improve the performance of optical coatings over a wide spectral range that would increase reflectance in mirrors and reduced absorption in dielectric filters used in optical telescope for FUV observations. This paper will present recent advances in reflectance performance for Al+MgF2 mirrors optimized for Lyman-alpha wavelength by performing the deposition of the MgF2 overcoat at elevated substrate temperatures. We will also present optical characterization of little studied rare-earth fluorides such as GdF3 and LuF3 that exhibit low-absorption over a wide wavelength range and could therefore be used as high refractive index alternatives fordielectric coatings at FUV wavelengths.
File Size	1535275
Page Count	27
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20150000221
Archival Resource Key	ark:/13960/t8jd9vw4f
Language	English
Publisher Date	2014-11-18
Access Restriction	Open
Subject Keyword	Lif Aluminum Mgf2 Reflectance Far-uv Coatings Progress Performance Tests Lyman Alpha Radiation Galactic Evolution Ultraviolet Spectra Magnesium Fluorides Film Thickness Spectral Reflectance Characterization Vapor Deposition Magnetron Sputtering Far Ultraviolet Radiation Proving Cosmology Optical Coatings Ultraviolet Astronomy Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Presentation

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