Results 21 to 30 of about 51,201 (322)

Dispersion Characteristics of the Multi-mode Fiber-fed VIPA Spectrograph

The Astronomical Journal, 2023
A high-resolution ( ${ \mathcal R }\gt {10}^{5}$ ), multi-mode fiber-fed spectrograph on large telescopes with a reasonable size is desirable in astronomy.
Xiaoming Zhu, Dong Lin, Zhongnan Zhang, Xintong Xie, Jinping He   +4 more
doaj   +1 more source

Generalized large optics fabrication multiplexing

Journal of the European Optical Society-Rapid Publications, 2022
High precision astronomical optics are manufactured through deterministic computer controlled optical surfacing processes, such as subaperture small tool polishing, magnetorheological finishing, bonnet tool polishing, and ion beam figuring.
Kim Daewook, Ke Xiaolong, Pullen Weslin, Wang Tianyi, Choi Heejoo, Negi Vipender Singh, Huang Lei, Idir Mourad   +7 more
doaj   +1 more source

Disturbance Modelling for Minimum Variance Control in Adaptive Optics Systems Using Wavefront Sensor Sampled-Data

Sensors, 2021
Modern large telescopes are built based on the effectiveness of adaptive optics systems in mitigating the detrimental effects of wavefront distortions on astronomical images.
María Coronel, Rodrigo Carvajal, Pedro Escárate, Juan C. Agüero   +3 more
doaj   +1 more source

Antarctic Survey Telescope 3-3: Overview, System Performance and Preliminary Observations at Yaoan, Yunnan

Universe, 2022
The third Antarctic Survey Telescope array instrument at Dome A in Antarctica, the AST3-3 telescope, has been in commissioning from March 2021. We deployed AST3-3 at the Yaoan astronomical station in Yunnan Province for an automatic time-domain survey ...
Tianrui Sun, Xiaoyan Li, Lei Hu, Kelai Meng, Zijian Han, Maokai Hu, Zhengyang Li, Haikun Wen, Fujia Du, Shihai Yang, Bozhong Gu, Xiangyan Yuan, Yun Li, Huihui Wang, Lei Liu, Zhenxi Zhu, Xuehai Huang, Chengming Lei, Lifan Wang, Xuefeng Wu   +19 more
doaj   +1 more source

Mid-infrared guided optics: a perspective for astronomical instruments

Optics Express, 2009
Lucas Labadie, Oswald Wallner
openalex   +3 more sources

A Fuzzy Logic Based Algorithm for Finding Astronomical Objects in Wide-Angle Frames [PDF]

, 2005
Accurate automatic identification of astronomical objects in an imperfect world of non-linear wide-angle optics, imperfect optics, inaccurately pointed telescopes, and defect-ridden cameras is not always a trivial first step.
Bertin, Lior Shamir, Robert J. Nemiroff, Takagi, Zadeh, Zadeh   +5 more
core   +2 more sources

Ultrafast laser inscription in ZBLAN integrated optics chips for mid-IR beam combination in astronomical interferometry

Optics Express, 2017
Jan Tepper, Lucas Labadie, Simon Gross, Alexander Arriola, Stefano Minardi, Romina Diener, Michael J. Withford   +6 more
openalex   +3 more sources

High-efficiency Autonomous Laser Adaptive Optics [PDF]

, 2014
As new large-scale astronomical surveys greatly increase the number of objects targeted and discoveries made, the requirement for efficient follow-up observations is crucial.
Baranec, Christoph, Bui, Khanh, Burse, Mahesh, Chordia, Pravin, Das, Hillol, Dekany, Richard, Hogstrom, Kristina, Kulkarni, Shrinivas, Law, Nicholas M., Punnadi, Sujit, Ramaprakash, A. N., Riddle, Reed, Tendulkar, Shriharsh   +12 more
core   +4 more sources

Real-time Experimental Demonstrations of a Photonic Lantern Wave-front Sensor

The Astrophysical Journal Letters, 2023
The direct imaging of an Earth-like exoplanet will require sub-nanometric wave-front control across large light-collecting apertures to reject host starlight and detect the faint planetary signal.
Jonathan W. Lin, Michael P. Fitzgerald, Yinzi Xin, Yoo Jung Kim, Olivier Guyon, Barnaby Norris, Christopher Betters, Sergio Leon-Saval, Kyohoon Ahn, Vincent Deo, Julien Lozi, Sébastien Vievard, Daniel Levinstein, Steph Sallum, Nemanja Jovanovic   +14 more
doaj   +1 more source

Post processing of differential images for direct extrasolar planet detection from the ground [PDF]

, 2006
The direct imaging from the ground of extrasolar planets has become today a major astronomical and biological focus. This kind of imaging requires simultaneously the use of a dedicated high performance Adaptive Optics [AO] system and a differential ...
Fusco, T., Mugnier, L., Rousset, G., Sauvage, J. -F.   +3 more
core   +3 more sources