Initial test results from the Next Generation Space Telescope (NGST) wavefront sensing and control testbed (WCT)

2000 ◽  
Author(s):  
Charles W. Bowers ◽  
Pamela S. Davila ◽  
Bruce H. Dean ◽  
Brendon D. Perkins ◽  
Mark E. Wilson ◽  
...  
Keyword(s):  
Wavefront Sensing ◽  
Test Results ◽  
Next Generation ◽  
Initial Test ◽  
Space Telescope ◽  
And Control

scholarly journals Developmental cryogenic active telescope testbed: a wavefront sensing and control testbed for the Next-Generation Space Telescope

1998 ◽  
Author(s):  
Claudia M. LeBoeuf ◽  
Pamela S. Davila ◽  
David C. Redding ◽  
Armando Morrell ◽  
Andrew E. Lowman ◽  
...  
Keyword(s):  
Wavefront Sensing ◽  
Next Generation ◽  
Space Telescope ◽  
And Control

Wavefront sensing and control for a Next-Generation Space Telescope

1998 ◽  
Author(s):  
David C. Redding ◽  
Scott A. Basinger ◽  
Andrew E. Lowman ◽  
Andrew Kissil ◽  
Pierre Y. Bely ◽  
...  
Keyword(s):  
Wavefront Sensing ◽  
Next Generation ◽  
Space Telescope ◽  
And Control

scholarly journals A Tip–Tilt and Piston Detection Approach for Segmented Telescopes

Photonics ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 3
Author(s):  
Shun Qin ◽  
Wai Kin Chan
Keyword(s):  
Error Detection ◽  
Phase Retrieval ◽  
Dynamic Range ◽  
Detection Accuracy ◽  
Wavefront Sensing ◽  
Next Generation ◽  
Large Aperture ◽  
Detection Approach ◽  
Segmented Mirror ◽  
And Control

Accurate segmented mirror wavefront sensing and control is essential for next-generation large aperture telescope system design. In this paper, a direct tip–tilt and piston error detection technique based on model-based phase retrieval with multiple defocused images is proposed for segmented mirror wavefront sensing. In our technique, the tip–tilt and piston error are represented by a basis consisting of three basic plane functions with respect to the x, y, and z axis so that they can be parameterized by the coefficients of these bases; the coefficients then are solved by a non-linear optimization method with the defocus multi-images. Simulation results show that the proposed technique is capable of measuring high dynamic range wavefront error reaching 7λ, while resulting in high detection accuracy. The algorithm is demonstrated as robust to noise by introducing phase parameterization. In comparison, the proposed tip–tilt and piston error detection approach is much easier to implement than many existing methods, which usually introduce extra sensors and devices, as it is a technique based on multiple images. These characteristics make it promising for the application of wavefront sensing and control in next-generation large aperture telescopes.

James Webb Space Telescope wavefront sensing and control algorithms

2004 ◽  
Author(s):  
Daniel S. Acton ◽  
Paul D. Atcheson ◽  
Mick Cermak ◽  
Lana K. Kingsbury ◽  
Fang Shi ◽  
...  
Keyword(s):  
Control Algorithms ◽  
Wavefront Sensing ◽  
Space Telescope ◽  
James Webb Space Telescope ◽  
And Control

Wavefront sensing and control software for a segmented space telescope

2003 ◽  
Author(s):  
Scott A. Basinger ◽  
Laura A. Burns ◽  
David C. Redding ◽  
Fang Shi ◽  
David Cohen ◽  
...  
Keyword(s):  
Wavefront Sensing ◽  
Control Software ◽  
Space Telescope ◽  
And Control

Verification of the James Webb Space Telescope (JWST) wavefront sensing and control system

2008 ◽  
Author(s):  
Adam R. Contos ◽  
D. Scott Acton ◽  
Allison A. Barto ◽  
Laura A. Burns ◽  
James Contreras ◽  
...  
Keyword(s):  
Control System ◽  
Wavefront Sensing ◽  
Space Telescope ◽  
James Webb Space Telescope ◽  
And Control

Bringing it all together: a unique approach to requirements for wavefront sensing and control on the James Webb Space Telescope (JWST)

2006 ◽  
Author(s):  
Adam R. Contos ◽  
D. Scott Acton ◽  
Paul D. Atcheson ◽  
Allison A. Barto ◽  
Paul A. Lightsey ◽  
...  
Keyword(s):  
Wavefront Sensing ◽  
Space Telescope ◽  
James Webb Space Telescope ◽  
Unique Approach ◽  
And Control

Next Generation Space Telescope technology

1996 ◽  
Author(s):  
James Bilbro ◽  
Dan Coulter ◽  
Gary Martin
Keyword(s):  
Next Generation ◽  
Space Telescope
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