Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Joseph M. Ritter"'
Autor:
Joseph M. Ritter, Masato Kagitani, Shohei Aoki, Manuela Sornig, Isao Murata, G. Sonnabend, Hideo Sagawa, S. Okano, Makoto Taguchi, Jeff Kuhn, Takeshi Sakanoi, Yasumasa Kasaba, Kosuke Takami, Hiromu Nakagawa
Publikováno v:
Planetary and Space Science. 126:34-48
A new Mid-Infrared Laser Heterodyne Instrument (MILAHI) with >10 6 resolving power at 7–12 μm was developed for continuous monitoring of planetary atmospheres by using dedicated ground-based telescopes for planetary science at Mt. Haleakalā, Hawa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5cf09d51d2263376a7571e1e57b90790
https://doi.org/10.1016/j.pss.2016.04.002
https://doi.org/10.1016/j.pss.2016.04.002
Publikováno v:
Journal of Applied Physics. 95:5896-5904
Gradient index lenses were formed in a liquid-filled cavity supporting an ultrasonic standing wave. The constructed devices acted as diverging lenses or axicon lenses, depending on whether the center or edge region is interrogated. The focal length o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::855419a30ffd7a1bb094d4ded609dce6
https://doi.org/10.1063/1.1697618
https://doi.org/10.1063/1.1697618
Publikováno v:
Free-Space Laser Communication and Atmospheric Propagation XXVI.
NASA is currently developing optical communications to use with its spacecraft—both in earth-orbit and in deep space. This may allow spacecraft to use small, pencil-beam telescopes instead of large, wide-beam microwave antennas, potentially saving
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2a6c0176b2810912e19f5edd413a433
https://doi.org/10.1117/12.2044612
https://doi.org/10.1117/12.2044612
Autor:
Joseph M. Ritter, Kenneth J. Voss
Publikováno v:
Journal of Atmospheric and Oceanic Technology. 17:1040-1047
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9930e6bf4dd13d48ac195256587266d
https://doi.org/10.1175/1520-0426(2000)017<1040:anifmo>2.0.co
https://doi.org/10.1175/1520-0426(2000)017<1040:anifmo>2.0.co
Publikováno v:
SPIE Proceedings.
The nineteenth century Fraunhofer primary objective grating (POG) telescope has been redesigned with a secondary spectrometer. The POG is embossed on a membrane and placed at an angle of grazing exodus relative to a conventional spectrographic telesc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::55efd4d8bead1476147b9f64800bbd57
https://doi.org/10.1117/12.826377
https://doi.org/10.1117/12.826377
Autor:
Joseph M. Ritter
Publikováno v:
SPIE Proceedings.
Presented is a novel optical system using Cis-Trans photoisomerization where nearly every molecule of a mirror substrate is itself an optically powered actuator. Primary mirrors require sub-wavelength figure (shape) error in order to achieve acceptab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e5bb4a0d6b44c80377880d183f09f0d
https://doi.org/10.1117/12.826504
https://doi.org/10.1117/12.826504
Autor:
Joseph M. Ritter, Thomas D. Ditto
Publikováno v:
SPIE Proceedings.
We discuss a transmission primary objective grating (POG) telescope that is nearly flat to the ground with its secondary components buried below ground in a protected environment that enjoys a controlled atmosphere. Temperature gradients can be held
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::387ee3de3cb0837c756488a5fe5a8662
https://doi.org/10.1117/12.790268
https://doi.org/10.1117/12.790268
Autor:
Thomas D. Ditto, Joseph M. Ritter
Publikováno v:
Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation.
A new class of astronomical telescope with a primary objective grating (POG) has been studied as an alternative to mirrors. Nineteenth century POG telescopes suffered from low resolution and ambiguity of overlapping spectra as well as background nois
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6c40033d3d23ecc761322d77224ca35
https://doi.org/10.1117/12.790244
https://doi.org/10.1117/12.790244
Publikováno v:
Space Telescopes and Instrumentation 2008: Optical, Infrared, and Millimeter.
Photons weigh nothing. Why must even small space telescopes weigh tons? Primary mirrors require sub-wavelength figure (shape) error in order to achieve acceptable Strehl ratios. Traditional telescopy methods require rigid and therefore heavy mirrors
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66059e7ef1f69383c665ea9e1493b0ba
https://doi.org/10.1117/12.790212
https://doi.org/10.1117/12.790212
Autor:
Joseph M. Ritter, Thomas D. Ditto
Publikováno v:
SPIE Proceedings.
Inside an aircraft fuselage there is little room for the mass of all the instrumentation of a ground-based observatory much less a primary objective aperture at the scale of 10 meters. We have proposed a solution that uses a primary objective grating
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b34144be6ef92ca53327360b148e8357
https://doi.org/10.1117/12.790261
https://doi.org/10.1117/12.790261