Zobrazeno 1 - 10
of 108
pro vyhledávání: '"H. Allik"'
Publikováno v:
Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXXII.
Low light level (LLL) color vision is becoming more obtainable with improvements in Complementary Metal Oxide Semiconductor Sensor (CMOS) imagers. It is drawing interest in the commercial, military, and first responder communities. Since human percep
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::acfbdc20fd20f67915a198ef010150b9
https://doi.org/10.1117/12.2585777
https://doi.org/10.1117/12.2585777
Publikováno v:
Ocean Sensing and Monitoring X.
Visual inspection of crude oil on water can determine the depth of thin layers of oil. However, catastrophic spills with millimeter (mm) thick oil will just be black, with no visual variation as the oil gets thicker. A day/night heat transfer model w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3514295b2cd92373f85ea156d0b37f04
https://doi.org/10.1117/12.2300266
https://doi.org/10.1117/12.2300266
Autor:
Mark Walters, Lance LeClair, John Gill, Roberta Dixon, Toomas H. Allik, Evan Sippel, George Ax, Scot Myhr
Publikováno v:
Ocean Sensing and Monitoring X.
MARINE SCOUT is a compact, lightweight, Puma and other small UAS (SUAS) compatible, multi-spectral airborne sensor payload designed to sense and discriminate oil on water (e.g., maritime oil spills), and enable via post-processing the measurement of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2194260b5da6b1ddbd7ba3a68d6c94b0
https://doi.org/10.1117/12.2303963
https://doi.org/10.1117/12.2303963
Autor:
Mark Walters, Roberta Dixon, Thomas J. Soyka, Jay Cho, Mark Roberts, Toomas H. Allik, Len Ramboyong
Publikováno v:
SPIE Proceedings.
Although advances have been made in oil spill remote detection, many electro-optic sensors do not provide real-time images, do not work well under degraded visual environments, nor provide a measure of extreme oil thickness in marine environments. A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d101ab10a0021e4ba2d465c8a9487d7
https://doi.org/10.1117/12.2222064
https://doi.org/10.1117/12.2222064
Autor:
Barry Wechsler, Dhiraj K. Sardar, Raylon M. Yow, John B. Gruber, Michael Scripsick, Toomas H. Allik
Publikováno v:
Journal of Luminescence. 117:233-238
Spectroscopic properties are presented for Yb3+ incorporated into single crystals of LiTaO3 grown by the top-seeded solution growth method. From an analysis of the absorption and fluorescence spectra, we are able to determine the Stark-level componen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e35e3092a7cae35b95b3eb887864fa5a
https://doi.org/10.1016/j.jlumin.2005.09.007
https://doi.org/10.1016/j.jlumin.2005.09.007
Publikováno v:
Optical Materials. 27:351-358
We report a detailed crystal-field splitting analysis of the 13 lowest-energy multiplet manifolds, 2S+1 L J , of Nd 3+ (4f 3 ) in stoichiometric NdP 5 O 14 . The observed manifold splittings were determined by analyzing the absorption spectra between
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3eb9e1e9c79592ec31b170110c2a8d31
https://doi.org/10.1016/j.optmat.2004.07.001
https://doi.org/10.1016/j.optmat.2004.07.001
Energy-level structure and spectral analysis of Nd3+(4f3) in polycrystalline ceramic garnet Y3Al5O12
Publikováno v:
Journal of Applied Physics. 96:3050-3056
A detailed crystal-field splitting analysis is given for the 26 lowest-energy multiplet manifolds, LJ2S+1, of Nd3+(4f3) in polycrystalline ceramic garnet Y3Al5O12 (YAG). The absorption spectra obtained between 8K and room temperature, and between 175
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99bf1224a48a48ee26dcb0306bc23348
https://doi.org/10.1063/1.1776320
https://doi.org/10.1063/1.1776320
Autor:
John B. Gruber, Bruce H. T. Chai, J. Andrew Hutchinson, Michael D. Seltzer, Clyde A. Morrison, Andrew O. Wright, Larry D. Merkle, Toomas H. Allik, Bahram Zandi
Publikováno v:
Journal of Applied Physics. 81:6585-6598
Polarized fluorescence spectra produced by site-selective excitation, and conventional polarized absorption spectra were obtained for Tm3+ and Er3+ ions individually incorporated into single crystals of strontium fluorapatite, Sr5(PO4)3F, also known
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d1e1a1d0c60f4e1bed6018c4229af6c1
https://doi.org/10.1063/1.365197
https://doi.org/10.1063/1.365197
Autor:
Melvin P. Nadler, Andrew O. Wright, John B. Gruber, Toomas H. Allik, Clyde A. Morrison, Bruce H. T. Chai, Michael D. Seltzer, J. Andrew Hutchinson
Publikováno v:
Journal of Applied Physics. 79:1746-1758
Polarized absorption and fluorescence spectra were analyzed to establish individual energy (Stark) levels of Nd3+ ions in host crystals of Sr5(PO4)3F (SFAP) and Ca5(PO4)3F (FAP). Site‐selective excitation and fluorescence facilitated differentiatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::92296b32aa87c56b3a9293970a64b2e3
https://doi.org/10.1063/1.360964
https://doi.org/10.1063/1.360964
Autor:
Clyde A. Morrison, Michael D. Seltzer, J. Andrew Hutchinson, Daniel C. Harris, Toomas H. Allik, John B. Gruber, Michael Scripsick
Publikováno v:
Journal of Applied Physics. 77:2116-2123
The spectroscopic properties of Cr‐doped Ca5(PO4)3F known as Cr:FAP were examined using several different chemical and physical means. Results from analytical titration measurements indicate that chromium is tetravalent in the samples investigated.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00f8ac63a71b1aceb1968eef564d01aa
https://doi.org/10.1063/1.358787
https://doi.org/10.1063/1.358787