Increasing the useful field of view of an adaptive optics system

1998 ◽  
Author(s):  
Mark R. Chun ◽  
Walter J. Wild ◽  
Fang Shi ◽  
Michael F. Smutko ◽  
Edward J. Kibblewhite ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Field Of View ◽  
Useful Field Of View ◽  
Adaptive Optics System

Field-of-view shifted Shack-Hartmann wavefront sensor for daytime adaptive optics system

2006 ◽  
Vol 31 (19) ◽  
pp. 2821 ◽  
Author(s):  
Chaohong Li ◽  
Hao Xian ◽  
Changhui Rao ◽  
Wenhan Jiang
Keyword(s):  
Adaptive Optics ◽  
Field Of View ◽  
Wavefront Sensor ◽  
Adaptive Optics System

scholarly journals Adaptive Optics and Interferometry on the Antarctic Plateau

2005 ◽  
Vol 13 ◽  
pp. 960-961
Author(s):  
James P. Lloyd
Keyword(s):  
Adaptive Optics ◽  
Coherence Time ◽  
Field Of View ◽  
Turbulent Layer ◽  
Antarctic Plateau ◽  
Useful Field Of View ◽  
Low Wind Speed ◽  
Visible Wavelengths ◽  
Sodar Measurements ◽  
The Antarctic

AbstractThe unique properties of atmospheric turbulence in atmosphere above the Antarctic plateau offer some compelling advantages for astronomical adaptive optics and interferometry. The shallow nature of the turbulent layer at the South Pole results in low scintillation and large angular coherence (Marks et al. 1996, 1999; Lloyd, Oppenheimer, & Graham 2002; Lloyd et al. 2003). Recent wintertime SODAR measurements at Dome C indicate that similar conditions exist at Dome C, but that the turbulent layer is likely both weaker and shallower. This paper discusses the outcomes of such conditions on the atmospheric properties for astronomy. Particularly due to the low wind speed at Dome C, the atmospheric properties are highly favorable for adaptive optics and interferometry. The resulting long coherence time enables adaptive optics at visible wavelengths, and the large angular coherence results in a useful field of view as a result.

scholarly journals A time-division correction method for adaptive optics system

2021 ◽  
Vol 2093 (1) ◽  
pp. 012038
Author(s):  
Guangfu Yuan ◽  
Lirong Zhao ◽  
Peijian Wu ◽  
Weijie Wang
Keyword(s):  
Adaptive Optics ◽  
Correction Method ◽  
Field Of View ◽  
Image Feature ◽  
Astronomical Observation ◽  
Multiple Point ◽  
Light Sources ◽  
Extended Target ◽  
Point Light ◽  
Adaptive Optics System

Abstract An adaptive optics system can measure and compensate the wavefront distortion caused by dynamic disturbance in real time. It is usually used for astronomical observation and other occasions. According to the current technology, it is only suitable for small field of view optical system or point target, but not for ground extended target detection. In order to solve this problem, a correction method is proposed: firstly, the sub aperture image of wavefront sensor is divided into several sub regions, each sub region corresponds to a certain light direction or field angle range; secondly, calculate the offset of the image feature points in each sub region, and an image with good correction effect in a field of view in this direction is obtained; the last step is to measure each sub region one by one and combine these images into a full frame image. Through comparison, it is found that the method proposed in this paper is essentially to divide the extended target into multiple point light sources for correction.

scholarly journals Temporal statistics of residual wavefront variance of an adaptive optics system

2019 ◽  
Vol 21 (12) ◽  
pp. 125606
Author(s):  
Jian Huang ◽  
Hong Zhou ◽  
Jinsheng Yang ◽  
Chao Liu ◽  
Hao Xian
Keyword(s):  
Adaptive Optics ◽  
Temporal Statistics ◽  
Adaptive Optics System

scholarly journals Improved Wavefront Reconstruction and Correction Strategy for Adaptive Optics System with a Plenoptic Sensor

2021 ◽  
pp. 1-1
Author(s):  
Jintian Hu ◽  
Chen Tao ◽  
Xudong Lin ◽  
Liang Wang ◽  
Qichang An ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Wavefront Reconstruction ◽  
Adaptive Optics System

Optimal control techniques for the adaptive optics system of the LBT

2008 ◽  
Author(s):  
G. Agapito ◽  
F. Quiros-Pacheco ◽  
P. Tesi ◽  
S. Esposito ◽  
M. Xompero
Keyword(s):  
Optimal Control ◽  
Adaptive Optics ◽  
Control Techniques ◽  
Adaptive Optics System

scholarly journals Large Binocular Telescope Adaptive Optics System: new achievements and perspectives in adaptive optics

2011 ◽  
Author(s):  
S. Esposito ◽  
A. Riccardi ◽  
E. Pinna ◽  
A. Puglisi ◽  
F. Quirós-Pacheco ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Adaptive Optics System
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