Segmented mirror coarse phasing with a dispersed fringe sensor: experiments on NGST's wavefront control testbed

Fang Shi; David C. Redding; Andrew E. Lowman; Charles W. Bowers; Laura A. Burns; Peter Petrone III; Catherine Mayumi Ohara; Scott A. Basinger

doi:10.1117/12.461113

5 March 2003 Segmented mirror coarse phasing with a dispersed fringe sensor: experiments on NGST's Wavefront Control Testbed

Fang Shi, David C. Redding, Andrew E. Lowman, Charles W. Bowers, Laura A. Burns, Peter Petrone III, Catherine Mayumi Ohara, Scott A. Basinger

Author Affiliations +

Proceedings Volume 4850, IR Space Telescopes and Instruments; (2003) https://doi.org/10.1117/12.461113
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

A piston sensing and control algorithm for segmented mirror coarse phasing using a dispersed fringe sensor (DFS) has been developed for the Next Generation Space Telescope (NGST) wavefront sensing and control. The DFS can detect residual piston errors as large as the order of a depth-of-focus and can phase the segment mirrors with accuracy better than 0.1 microns, which is well within the capture range of fine phasing for NGST. A series of experiments have been carried out on the NGST's Wavefront Control Testbed (WCT) to validate the modeling results, evaluate the DFS performance, and systematically explore the factors that affect the DFS performance. This paper reports the testbed results for several critical issues of DFS performance, including DFS dynamic range, accuracy, fringe visibility, and the effects of segment mirror aberrations.

Citation Download Citation

Fang Shi, David C. Redding, Andrew E. Lowman, Charles W. Bowers, Laura A. Burns, Peter Petrone III, Catherine Mayumi Ohara, and Scott A. Basinger "Segmented mirror coarse phasing with a dispersed fringe sensor: experiments on NGST's Wavefront Control Testbed", Proc. SPIE 4850, IR Space Telescopes and Instruments, (5 March 2003); https://doi.org/10.1117/12.461113

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available