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31 to 40 of 56 Results
Aluminum mirror coatings for UVOIR telescope optics including the far UV
Aug 9, 2015
Balasubramanian, Kunjithapatham; Hennessy, John; Raouf, Nasrat; Nikzad, Shouleh; Ayala, Michael; Shaklan, Stuart; Scowen, Paul; Del Hoyo, Javier; Quijada, Manuel, 2015, "Aluminum mirror coatings for UVOIR telescope optics including the far UV", https://hdl.handle.net/2014/45760, SPIE Optics + Photonics, San Diego, California, August 9-13, 2015, JPL Open Repository
We present the current status of process development in the FUV achieved with little or no degradation over a year.
Exoplanet coronagraph shaped pupil masks and laboratory scale star shade masks: design, fabrication and characterization
Aug 9, 2015
Balasubramanian, Kunjithapatham; White, Victor; Yee, Karl; Echternach, Pierre; Muller, Richard; Dickie, Matthew; Cady, Eric; Mejia Prada, Camilo; Ryan, Daniel; Poberezhskiy, Ilya; Zhou, Hanying; Kern, Brian; Riggs, A.J.; Zimmerman, Neil T.; Sirbu, Dan; Shaklan, Stuart; Kasdin, Jeremy, 2015, "Exoplanet coronagraph shaped pupil masks and laboratory scale star shade masks: design, fabrication and characterization", https://hdl.handle.net/2014/45759, SPIE Optics + Photonics, San Diego, California, August 9-13, 2015, JPL Open Repository
We present the approaches employed at JPL to produce pupil plane and image plane coronagraph masks by combining electron beam, deep reactive ion etching, and black silicon technologies with illustrative examples of each, highlighting milestone accomplishments. We also present bri...
Studies of the effects of control bandwidth and dark-hole size on the HCIT contrast performance
Aug 9, 2015
Sidick, Erkin; Shaklan, Stuart; Balasubramanian, Kunjithapatham; Cady, Eric, 2015, "Studies of the effects of control bandwidth and dark-hole size on the HCIT contrast performance", https://hdl.handle.net/2014/45744, SPIE Optics + Photonics, San Diego, California, August 9-13, 2015, JPL Open Repository
We have carried out both theoretical and experimental studies of the sensitivity of dark hole contrast to the control bandwidth and dark-hole dimensions in high-contrast broadband stellar coronagraphy.
Studies of the effects of control bandwidth and dark-hole size on the HCIT contrast performance
Aug 9, 2015
Sidick, Erkin; Shaklan, Stuart; Balasubramanian, Kunjithapatham; Cady, Eric J., 2015, "Studies of the effects of control bandwidth and dark-hole size on the HCIT contrast performance", https://hdl.handle.net/2014/45748, SPIE Optics + Photonics, San Diego, California, August 9-13, 2015, JPL Open Repository
No abstract provided
High-contrast coronagraph performance in the presence of DM actuator defects
Aug 9, 2015
Sidick, Erkin; Shaklan, Stuart; Cady, Eric, 2015, "High-contrast coronagraph performance in the presence of DM actuator defects", https://hdl.handle.net/2014/45746, SPIE Optics + Photonics, San Diego, California, August 9-13, 2015, JPL Open Repository
We have carried out experiments on our High-Contract Imaging Testbed (HCIT) to study the impact of failed actuators in partial fulfillment of the Terrestrial Planet Finder Coronagraph optical model validation milestone. We show that the wavefront control algorithm adapts to sever...
AFTA coronagraph update
Feb 18, 2013
Shaklan, Stuart; Foote, Marc; Underhill, Mike; Klein, Daniel; Levine, Marie; Rodgers, Mike, 2013, "AFTA coronagraph update", https://hdl.handle.net/2014/44088, Astrophysics Focused Telescope Assets (AFTA) Periodic Science Definition Team Meeting, Greenbelt, Maryland, March 18, 2013., JPL Open Repository
No abstract provided
Starshade Earth characterizer with SALSO
Feb 6, 2013
Kasdin, N. Jeremy; Vanderbei, Robert; Turner, Edwin; Lisman, Doug; Shaklan, Stuart; Cady, Eric; Thomson, Mark; Macintosh, Bruce; Savransky, Dmitry; Turnbull, Margaret; Soummer, Remi, 2013, "Starshade Earth characterizer with SALSO", https://hdl.handle.net/2014/44110, Study on Applications of Large Space Optics (SALSO) Workshop, Huntsville, Alabama, February 6, 2013., JPL Open Repository
No abstract provided
HCIT broadband contrast performance sensitivity studies
Aug 11, 2012
Sidick, Erkin; Shaklan, Stuart; Balasubramanian, Kunjithapatham, 2012, "HCIT broadband contrast performance sensitivity studies", https://hdl.handle.net/2014/42395, SPIE Optical Engineering and Applications 2012, San Diego, California, August 12-16,2012, JPL Open Repository
No abstract provided
Electric field reconstruction in the image plane of a high-contrast coronagraph using a set of pinholes around the Lyot plane
Jul 4, 2012
Give’on, Amir; Kern, Brian; Shaklan, Stuart; Wallace, Kent; Noecker, Charley, 2012, "Electric field reconstruction in the image plane of a high-contrast coronagraph using a set of pinholes around the Lyot plane", https://hdl.handle.net/2014/42413, SPIE Astronomical Telescopes+Instrumentation, Amsterdam, Netherlands, July 1-6, 2012, JPL Open Repository
No abstract provided
Nondimensional representations for occulter design and performance evaluation
Aug 23, 2011
Cady, Eric; Shaklan, Stuart, 2011, "Nondimensional representations for occulter design and performance evaluation", https://hdl.handle.net/2014/43798, SPIE Optics + Photonics 2011, San Diego, California, August 20-25, 2011., JPL Open Repository
No abstract provided
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