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The Asymmetric, Dual-Michelson Wavefront Corrector: High Precision Correction of Amplitude and Phase for CoronagraphyTo detect extra-solar planets by coronagraphy will require unprecedented levels of wavefront correction of both phase and amplitude. To achieve this, we propose a dual Michelson interferometer arrangement, incorporating two deformable mirrors (DM) and a third, fixed mirror (all at pupils) and two beamsplitters: one with unequal (asymmetric) beam splitting and one with symmetric beamsplitting. This design allows high precision correction of phase and amplitude using DMs with relatively coarse steps and is relatively insensitive to small changes in the DMs. We are constructing such an apparatus incorporating two MEMS devices and will report on features of the design performance.
Document ID
20040182461
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Bowers, Charles
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Woodgate, Bruce
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Lyon, Richard
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 22, 2013
Publication Date
January 1, 2004
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: SPIE Meeting
Location: Glasgow, Scotland
Country: United Kingdom
Start Date: June 1, 2004
Sponsors: International Society for Optical Engineering
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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