Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Eugene Warren Campbell"'
Autor:
Abraham P. Lee, Peter A. Krulevitch, C. McConaghy, Eugene Warren Campbell, Gary E. Sommargren
Publikováno v:
Journal of Microelectromechanical Systems. 12:960-971
This research utilizes the levitation effect of electrostatic comb fingers to design vertical-to-the-substrate actuation for optical phase shifting interferometry applications. For typical polysilicon comb drives with 2 /spl mu/m gaps between the sta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9daaefd0b9c951a0e805af3d87d3a140
https://doi.org/10.1109/jmems.2003.820262
https://doi.org/10.1109/jmems.2003.820262
Publikováno v:
SPIE Proceedings.
Any adaptive optics system must be calibrated with respect to internal aberrations in order for it to properly correct the starlight before it enters the science camera. Typical internal calibration consists of using a point source stimulus at the in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e9118141b2dff6a6fd6dd63d641056a
https://doi.org/10.1117/12.363582
https://doi.org/10.1117/12.363582
Publikováno v:
SPIE Proceedings.
A phase-shifting diffraction interferometer (PSDI) has been integrated into an adaptive optics (AO) system developed by LLNL for use on the three meter Shane telescope at Lick Observatory. The interferometer is an all fiber optic design, which is ext
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4ddb078e245c17d4fadeee254568a9d
https://doi.org/10.1117/12.363579
https://doi.org/10.1117/12.363579
Autor:
Bruce Macintosh, Carmen J. Carrano, Gary J. Freeze, Michael J. Newman, Jong R. An, V.K. Kanz, Kenneth Avicola, Elinor L. Gates, Edward L. Pierce, Herbert W. Friedman, Thomas C. Kuklo, J. Watson, James M. Brase, Jeffrey B. Cooke, Eugene Warren Campbell, Kenneth E. Waltjen, Claire E. Max, Donald T. Gavel, Brian J. Bauman, Scot S. Olivier
Publikováno v:
SPIE Proceedings.
Results of experiments with the laser guide star adaptive optics system on the 3-meter Shane telescope at Lick Observatory have demonstrated a factor of 4 performance improvement over previous results. Stellar images recorded at a wavelength of 2 mic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::85a09ea90657fa14fb40363a43b8a5bf
https://doi.org/10.1117/12.363561
https://doi.org/10.1117/12.363561
Autor:
C. McConaghy, Abraham P. Lee, Gary E. Sommargren, Peter Krulevitch, Jimmy C. Trevino, Eugene Warren Campbell
Publikováno v:
SPIE Proceedings.
The electrostatic comb finger drive has become an integral design for microsensor and microactuator applications. This paper reports on utilizing the levitation effect of comb fingers to design vertical-to-the-substrate actuation for interferometric
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62404cf4ba0fb0fc957cc991f11c3adb
https://doi.org/10.1117/12.284506
https://doi.org/10.1117/12.284506
Autor:
Eugene Warren Campbell, Abdalla M. Darwish, Jian Fu, Putcha Venkateswarlu, Tomasz P. Jannson, Gajendra D. Savant, Marius P. Schamschula, H. John Caulfield, Mikhail A. Noginov, Sergey S. Sarkisov
Publikováno v:
SPIE Proceedings.
The features and operation of an electro-optically switched binary optical time delay system are discussed. THe system based on polarization switching using the low cost ferro- electric liquid crystal and polarizing beam splitters provides compactnes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::78bfef100fc1923bdecfc5701d982e63
https://doi.org/10.1117/12.256155
https://doi.org/10.1117/12.256155
Publikováno v:
Application and Theory of Periodic Structures.
Zeroth-order effective medium theory is applied to analyze the properties of volume holographic gratings that have periods much smaller than the illumination wavelength. These holograms, called zeroth order gratings, can be modeled as negative uniaxi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9fe289085f2010ecd56e29d9d7cd0639
https://doi.org/10.1117/12.221243
https://doi.org/10.1117/12.221243
Publikováno v:
Application and Theory of Periodic Structures.
It is well known that gratings with high spatial frequency (spacings
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::993c42c0a8496ef45a1974d83d46fcf8
https://doi.org/10.1117/12.221225
https://doi.org/10.1117/12.221225
Publikováno v:
SPIE Proceedings.
The rigorous coupled-wave model is used to determine the polarization of diffracted waves from two superimposed volume gratings with their grating vectors in the same plane. The phase relations used in computing the phase shift of diffracted beams ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3d3be106233e53d2951c6b8dc016b5e
https://doi.org/10.1117/12.178079
https://doi.org/10.1117/12.178079
Publikováno v:
SPIE Proceedings.
The refractive index of holographic emulsions is an important parameter needed for designing holographic optical elements (HOE's). Theoretical calculations of the accuracy required for the refractive index and thickness of emulsions needed to meet pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::768526eb84b9427f6e506bd3ac29c3af
https://doi.org/10.1117/12.155010
https://doi.org/10.1117/12.155010