Results 61 to 70 of about 81,818 (284)

Numerical Focusing of a Wide Field-of-View Instrument for Monitoring the Planetary Energy Budget

Proceedings, 2019
Wide field-of-view optical instruments based on Ritchey-Crétien telescopes have been proposed to replace narrow field-of-view scanning instruments for Earth radiation budget monitoring applications.
Anum Barki Ashraf, J. Robert Mahan, Kory J. Priestley, Mohan Shankar   +3 more
doaj   +1 more source

A Nulling Wide Field Imager for Exoplanets Detection and General Astrophysics

, 2002
We present a solution to obtain a high-resolution image of a wide field with the central source removed by destructive interference. The wide-field image is created by aperture synthesis with a rotating sparse array of telescopes in space. Nulling of the
Aime, Aime, Aime, Angel, Beichman, Boccaletti, Bracewell, de Bruijne, Dermott, F. Roddier, Guyon, Guyon, Hajian, Jenniskens, Kresak, Labeyrie, Leger, Liou, Lyot, Malbet, Mennesson, Nakamura, O. Guyon, Peacock, Pedretti, Rando, Reach, Riaud, Roddier, Roddier, Rouan, Sykes, Wyne   +32 more
core   +2 more sources

Development of High‐Performance Multilayer Monochromators

Advanced Optical Materials, EarlyView.
Detailed insights into the optical and multilayer design of Double Multilayer Monochromators (DMM) are presented and fully characterized, including key optimization strategies and solutions to fabrication challenges. By integrating in‐house Ion Beam Figuring and a high uniformity multilayer coating process, the developed DMMs achieve high reflectivity,
Wadwan Singhapong, Arindam Majhi, Wai Jue Tan, Vishal Dhamgaye, Riley Shurvinton, Paresh Pradhan, Igor Dolbnya, Lucia Alianelli, Chris Bowen, Alexander J. G. Lunt, Hongchang Wang, Kawal Sawhney   +11 more
wiley   +1 more source

Detector and Telescope Development for ProtoEXIST and Fine Beam Measurements of Spectral Response of CZT Detectors [PDF]

, 2005
We outline our plan to develop ProtoEXIST, a balloon-borne prototype experiment for the Energetic X-ray Imaging Survey Telescope (EXIST) for the Black Hole Finder Probe. EXIST will consist of multiple wide-field hard X-ray coded-aperture telescopes.
Cook, W. R., Copete, A., Craig, W. W., Gehrels, N., Grindlay, J. E., Harrison, F., Hong, J., Vadawale, S. V.   +7 more
core   +2 more sources

Vision‐Assisted Avocado Harvesting with Aerial Bimanual Manipulation

Advanced Robotics Research, EarlyView.
This work outlines the design and implementation of a bimanual aerial robot that employs visual perception and learning to detect, reach, and harvest avocados. A new gripper and fixer arm assembly is used to harvest avocados, while visual perception enables the detection of avocados and estimation of their position and orientation for determining ...
Zhichao Liu, Jingzong Zhou, Caio Mucchiani, Konstantinos Karydis   +3 more
wiley   +1 more source

Comparison of Wavefront Sensing Methods for Solar Ground-Layer Adaptive Optics: Multi-Direction Averaging and Wide-Field Correlation

Photonics
Solar ground-layer adaptive optics (GLAO) is widely recognized as a key technology for achieving high-resolution, wide-field imaging in ground-based solar telescopes. However, the accuracy differences among various wavefront sensing methods in solar GLAO
Yuhe Liu, Ziming Li, Qianhan Zhou, Nanfei Yan, Xian Ran, Ao Tang, Zhen Li, Lanqiang Zhang, Changhui Rao   +8 more
doaj   +1 more source

Seeking particle dark matter in the TeV sky

, 2011
Under the assumption that dark matter is made of new particles, annihilations of those are required to reproduce the correct dark matter abundance in the Universe.
Brun, Pierre
core   +1 more source

Wide-field X-ray observations of the supernova remnant Puppis A with the SRG/ART-XC telescope [PDF]

, 2021
Roman Krivonos, V. Arefiev, I. Lapshov, E. Filippova, R. Burenin, A. Semena, С. А. Гребенев, S. Sazonov, A. E. Shtykovsky, A. Tkachenko, Lutovinov, A.   +10 more
openalex   +1 more source

Wide-Field Infrared Survey Telescope (WFIRST): optical telescope assembly (OTA) status [PDF]

Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 2018
The WFIRST Mission is the next large astrophysical observatory for NASA after the James Webb Space Telescope and is the top priority mission from the 2010 National Academy of Sciences' decadal survey. The WFIRST OTA includes the inherited primary and secondary mirrors with precision metering structures that are to be integrated to new mirror assemblies
Perry Voyer, Christine Cottingham, Dave Smith, Timothy Wilson, Jeffrey Scott Smith, Tony Whitman, Bonnie Patterson, James Mondello, Rob Egerman, Joe Marzouk, Dave Content, Tom Casey, Lisa Bartusek   +12 more
openaire   +1 more source

From Rigid to Soft Robotic Approaches for Neuroendoscopy

Advanced Robotics Research, EarlyView.
Robotic assistance has had minimal impact on deep intraventricular surgeries, where small‐scale, precision, and reduced invasiveness can contribute to improved patient outcomes. Emerging technologies in rigid, soft, and hybrid robotics are reviewed to identify the most promising mechanisms for deep brain navigation in addition to an attempt to identify
Kieran Gilday, Irena Zubak, Andreas Raabe, Josie Hughes   +3 more
wiley   +1 more source