Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Theodore Hadjimichael"'
Autor:
Joseph M. Howard, Clark Hovis, Ryan McClelland, Rongguang Liang, Kenneth J. Ranson, Jonathan C. Papa, Nicolas Gorius, Patrick L. Thompson, Raymond G. Ohl, Manal Khreishi, Theodore Hadjimichael
Publikováno v:
Optical Engineering. 60
Autor:
Ryan S. McClelland, Rongguang Liang, Patrick L. Thompson, Manal Khreishi, N. Gorius, Theodore Hadjimichael, Joseph M. Howard, Clark Hovis, Kenneth J. Ranson, Raymond G. Ohl, Jonathan C. Papa
Publikováno v:
Optical Engineering. 60
Optical designs for the next generation space science instruments call for unconventional, aspheric, and freeform (FF), prescriptions with tight tolerances. These advanced surfaces enable superior-performance, compact, and lower cost systems but are
Autor:
Joseph M. Howard, Adam Phenis, Manal Khreishi, Ron Shiri, Jonathan C. Papa, Theodore Hadjimichael, Garrett West, Clark Hovis, Raymond G. Ohl, Andrew Howe, Patrick L. Thompson, Rongguang Liang
Publikováno v:
Optical Design and Fabrication 2019 (Freeform, OFT).
CMM metrology provides simple, 3D surface data used for prescription retrieval, figure error, and alignment with high accuracy without null-correctors. Two freeform mirrors for a compact telescope were successfully characterized and aligned using the
Autor:
Gary J. Melnick, James Hays-Wehle, Matthew A. Greenhouse, Stefan W. Rosner, Chuck Engler, Gordon J. Stacey, Chuck Henderson, Karwan Rostem, Vilem Mikula, Wen-Ting Hsieh, Stuart Banks, Regis P. Brekosky, Mark O. Kimball, Jeffrey Huang, Pasquale Temi, William D. Vacca, Klaus M. Pontoppidan, Ari-David Brown, Felipe Colazo, Timothy M. Miller, Samuel H. Moseley, Edward J. Wollack, Shannon Wilks, Tony Cazeau, S. Maher, Iver Jenstrom, Naseem Rangwala, Nancy Rustemeyer, Thomas Nikola, Richard G. Arendt, Peter Taraschi, Robert E. McMurray, Jordi Vila Hernandez de Lorenzo, Michael Choi, Attila Kovács, Hristo Atanasoff, Steve Leiter, Alan Rhodes, Theodore Hadjimichael, Leroy Sparr, B. Wohler, Samuel N. Richards, Berhanu Bulcha, Jim Kellogg, Dejan Stevanovic, Aki Roberge, Elmer Sharp, Eric Mentzell, Joseph Oxborrow, Peter Nagler, Alexander Kutyrev
Publikováno v:
Journal of Astronomical Instrumentation.
The HIgh-Resolution Mid-infrarEd Spectrometer (HIRMES) is the 3rd Generation Instrument for the Stratospheric Observatory For Infrared Astronomy (SOFIA), currently in development at the NASA Goddard Space Flight Center (GSFC), and due for commissioni
Autor:
Kevin Redman, Eric G. Johnson, Kyle Mclean, Matthew Stephens, Jerrod Young, Greg Wenzel, Raymond G. Ohl, Dean Osgood, Emmanuel Cofie, James E. Parker, Theodore Hadjimichael, paul Bagdanove, Amy S. Lo, Tiffany Glassman, Adam Sutton, Vicki Roberts, Joshua Levi, Joshua Berrier, Joseph McMann
Publikováno v:
Optical System Alignment, Tolerancing, and Verification XI.
NASA's James Webb Space Telescope (JWST) is a 6.6m diameter, segmented, deployable telescope for cryogenic IR space astronomy. The JWST Observatory architecture includes the Primary Mirror Backplane Support Structure (PMBSS) and Integrated Science In
Autor:
Raymond G. Ohl, John G. Hagopian, William L. Eichhorn, Kevin Redman, David A. Kubalak, Jerrod Young, Peter Blake, Joseph E. Hayden, Brent J. Bos, Kyle F. Mclean, Theodore Hadjimichael, Jeffrey S. Gum, Victor J. Chambers, Henry P. Sampler, Greg Wenzel, Joseph McMann, Phillip Coulter, Samuel E. Hetherington
Publikováno v:
SPIE Proceedings.
The NASA Goddard Space Flight Center (GSFC) and its partners have broad experience in the alignment of flight optical instruments and spacecraft structures. Over decades, GSFC developed alignment capabilities and techniques for a variety of optical a
Autor:
Raymond G. Ohl, Philip Coulter, Jerrod Young, Timothy J. Madison, Manal Khreishi, Kyle F. Mclean, Joseph E. Hayden, Theodore Hadjimichael, Linda A. Miner, Kevin Redman, Jeffrey S. Gum, Greg Wenzel, Jason E. Hylan
Publikováno v:
2015 IEEE Aerospace Conference.
The final, flight build of the Integrated Science Instrument Module (ISIM) element of the James Webb Space Telescope is the culmination of years of work across many disciplines and partners. This paper covers the large volume, ambient, optical and op
Autor:
Susann Hummel, Andreas Roedel, Jason E. Hylan, Theodore Hadjimichael, Greg W. Wenzel, Maurice te Plate, Paul F. Schweiger, Joseph McMann, Markus Melf, Timothy J. Madison, Raymond G. Ohl, Jeffery S. Gum, Martyn Wells, Patrick Williams, Kevin W. Redman, Michael Maszkiewicz, David Lee, Alexander Beaton, Joseph E. Hayden, Phillip Coulter, Jerrod Young, Linda A. Miner, Kyle F. Mclean
Publikováno v:
Optical System Alignment, Tolerancing, and Verification VIII.
The James Webb Space Telescope science instruments are in the final stages of being integrated into the Integrated Science Instrument Module (ISIM) element. Each instrument is tied into a common coordinate system through mechanical references that ar
Autor:
William L. Eichhorn, Pamela S. Davila, Joseph E. Hayden, A. Slotwinski, Bente Eegholm, Randal Telfer, David A. Kubalak, G. Scharfstein, Eric Mentzell, Raymond G. Ohl, Theodore Hadjimichael
Publikováno v:
SPIE Proceedings.
The James Webb Space Telescope Integrated Science Instrument Module utilizes two fixtures to align the Optical Telescope Element Simulator (OSIM) to the coordinate systems established on the ISIM and the ISIM Test Platform (ITP). These fixtures conta
Autor:
M. Atanossova, Theodore Hadjimichael, Kai-Wing Chan, Peter Blake, M. Hong, W. W. Zhang, John P. Lehan, Timo T. Saha
Publikováno v:
SPIE Proceedings.
We present an overview update of the metrologic approach to be employed for the segmented mirror fabrication for the IXO soft x-ray telescope. We compare results achieved to date with mission requirements. This is discussed in terms of inherent capab