NGST high dynamic range unwrapped phase estimation

David Cohen; David C. Redding

doi:10.1117/12.461773

5 March 2003 NGST high dynamic range unwrapped phase estimation

David Cohen, David C. Redding

Proceedings Volume 4850, IR Space Telescopes and Instruments; (2003) https://doi.org/10.1117/12.461773
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

We report on an algorithm enabling estimation of high dynamic range pupil phase without wrapping ambiguity. This algorithm was developed and validated using the NGST Wavefront Control Testbed (WCT-1), which permits introduction of aberrations and subsequent correction using 2 deformable mirrors. The algorithm is an extension of a Modified Gerchberg-Saxton iterative technique that incorporates both an evolving trial estimate as well as intermediate unwrapping. We will discuss results from WCT-1 that illustrate phase estimation when varying degrees of aberration are introduced.

Citation Download Citation

David Cohen and David C. Redding "NGST high dynamic range unwrapped phase estimation", Proc. SPIE 4850, IR Space Telescopes and Instruments, (5 March 2003); https://doi.org/10.1117/12.461773

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