Zobrazeno 1 - 8
of 8
pro vyhledávání: '"David L. Lehner"'
Autor:
Ryan Upton, William R. Arnold, Brian D. Ramsey, David L. Lehner, Mikhail Gubarev, C. M. Benson, Thomas Kester
Publikováno v:
SPIE Proceedings.
We are developing grazing-incidence x-ray optics for astronomy. The optics are full-cylinder mirror shells fabricated using electroformed-nickel replication off super-polished mandrels. For space-based applications where weight is at a premium, very-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3883f356d4dffb1f92e1e47fc7bcf9f
https://doi.org/10.1117/12.735832
https://doi.org/10.1117/12.735832
Autor:
Mikhail V. Gubarev, Steve L. O'Dell, Thomas J. Kester, David L. Lehner, William D. Jones, Martin E. Smithers, David A. Content, Paul B. Reid
Publikováno v:
Optical Fabrication, Metrology, and Material Advancements for Telescopes.
The Constellation-X Spectroscopy X-ray telescope (SXT) is designed to be built from X-ray optic segments. The X-ray segments will be fabricated from the segmented mandrels using a replication process. The purpose of the incoming metrology is to map t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fcde22b5e330f38d6399691fed20553c
https://doi.org/10.1117/12.551902
https://doi.org/10.1117/12.551902
Publikováno v:
Journal of Astronomical Telescopes, Instruments, and Systems. 1:014001
Although large cryogenic space telescopes may provide a means of answering compelling astrophysics questions, the required increase in the primary mirror diameter presents technical challenges. Larger primaries are more flexible, and cryogenic mirror
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10fb871c08960889b952a1bca30d827e
https://doi.org/10.1117/1.jatis.1.1.014001
https://doi.org/10.1117/1.jatis.1.1.014001
Publikováno v:
SPIE Proceedings.
SRS Technologies has made significant strides in the research and development of ultra-lightweight membrane optics for future imaging applications while conducting work with NASA Marshall Space Flight Center and the Air Force Research Lab. Thin film
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e2e041515701ea9f3e75d72b10ea243
https://doi.org/10.1117/12.453606
https://doi.org/10.1117/12.453606
Publikováno v:
Second International Conference on Photomechanics and Speckle Metrology: Speckle Techniques, Birefringence Methods, and Applications to Solid Mechanics; Moiré Techniques, Holographic Interferometry, Optical NDT, and Applications to Fluid Mechanics.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48523d69e604ce33f5f8d7df03396170
https://doi.org/10.1117/12.57489
https://doi.org/10.1117/12.57489
Publikováno v:
Space Programs and Technologies Conference.
The feasibility of monitoring overall integrity of structural components made of filamentary composites, by embedding optical fibers between lamina of a composite beam, is investigated using a beam constructed of Kevlar/epoxy cloth with embedded opti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4db4edeca2b63d796c74183848037266
https://doi.org/10.2514/6.1990-3548
https://doi.org/10.2514/6.1990-3548
Publikováno v:
SPIE Proceedings.
Radial metrology combines an optical measurement technique with fiber optics and a unique lens system to study material properties and deformations on the inner surfaces of the cavities found, for example, inside pipes, tubes, and boreholes. The equa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60e9482b8be41dcdd17b9a273b742f50
https://doi.org/10.1117/12.947614
https://doi.org/10.1117/12.947614
Publikováno v:
SPIE Proceedings.
In the present paper, cavity shapes are profiled using two opposing collinear panoramic annular lenses. A speckle pattern is projected out from one panoramic annular lens onto a reference stan d or onto lle cavity wall itself, and the resulting speck
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::83523d819ade38914d89fe947dc1eea9
https://doi.org/10.1117/12.962820
https://doi.org/10.1117/12.962820