NTRS - NASA Technical Reports Server

Back to Results
Thin film interference optics for imaging the O II 834-A airglowNormal incidence thin film interference mirrors and filters have been designed to image the O II 834-A airglow. It is shown that MgF2 is a useful spacer material for this wavelength region. The mirrors consist of thin layers of MgF2 in combination with other materials that are chosen to reflect efficiently in a narrow band centered at 834 A. Peak reflectance of 60 percent can be obtained with a passband 200 A wide. Al/MgF2/Si and Al/MgF2/SiC interference coatings have been designed to reflect 834 A and to absorb the intense H I 1216 A airglow. An In/MgF2/In interference filter is designed to transmit 834 A and attenuate 1216 A radiation. Interference photocathode coatings for rejecting 1216 A radiation are also discussed.
Document ID
Document Type
Reprint (Version printed in journal)
Seely, John F. (U.S. Navy, Naval Research Laboratory, Washington DC, United States)
Hunter, William R. (SFA, Inc. Landover, MD, United States)
Date Acquired
August 15, 2013
Publication Date
July 1, 1991
Publication Information
Publication: Applied Optics
Volume: 30
ISSN: 0003-6935
Subject Category
Distribution Limits