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Exposure of Restore-L camera optical elements to a simulated orbital radiation environment
Author(s): Kevin H. Miller; James B. Heaney; Jean-Marie Lauenstein; Stephen K. Brown; Kenneth M. O'Connor; Sharon K. Miller
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Paper Abstract

This paper reports on the exposure of visible wavelength camera optical elements to a simulated orbital radiation environment in support of the Restore-L flight project at NASA’s Goddard Space Flight Center. Borosilicate glasses with various metal oxide dopants - S-LAL8, S-LAL18, N-SF1, and the polycarbonate material Makrolon GP were exposed to electrons and protons of varying energies. Low energy (E ≤ 10keV) charged particles were used primarily to assess degradation to the antireflective coatings of the optical elements. High energy (E ~ 1 MeV) charged particles were used to evaluate degradation to the bulk material. Elements of S-LAL18, N-SF1, LaK9G15, and Makrolon GP were exposed to a representative atomic oxygen rich environment. Elements of S-LAL8 and Makrolon GP were exposed to intense ultraviolet radiation. Pre- and post-exposure transmittance measurements were used to quantify the effects on the elements tested in the simulated environment over the 0.3 to 1.2 micron wavelength range. Our measurement results will be discussed in the context of their robustness to the orbital environment and the known chemical constituents of the materials tested.

Paper Details

Date Published: 30 August 2019
PDF: 9 pages
Proc. SPIE 11104, Current Developments in Lens Design and Optical Engineering XX, 111040D (30 August 2019); doi: 10.1117/12.2531108
Show Author Affiliations
Kevin H. Miller, NASA Goddard Space Flight Ctr. (United States)
James B. Heaney, SGT/KBR (United States)
Jean-Marie Lauenstein, NASA Goddard Space Flight Ctr. (United States)
Stephen K. Brown, NASA Goddard Space Flight Ctr. (United States)
Kenneth M. O'Connor, SGT/KBR (United States)
Sharon K. Miller, NASA Glenn Research Ctr. (United States)


Published in SPIE Proceedings Vol. 11104:
Current Developments in Lens Design and Optical Engineering XX
R. Barry Johnson; Virendra N. Mahajan; Simon Thibault, Editor(s)

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