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Chromatic behavior of amplitude and phase compensators

Published online by Cambridge University Press:  02 May 2006

Laurent Pueyo
Affiliation:
Department of Mechanical and Aerospace Engineering, Princeton University
Michael G. Littman
Affiliation:
Department of Mechanical and Aerospace Engineering, Princeton University
Jeremy Kasdin
Affiliation:
Department of Mechanical and Aerospace Engineering, Princeton University
Ruslan Belikov
Affiliation:
Department of Mechanical and Aerospace Engineering, Princeton University
Amir Give'on
Affiliation:
Department of Mechanical and Aerospace Engineering, Princeton University
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Abstract

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The achievable contrast level for space-based detection of exo-planets will be limited by the stability of the optics. As a consequence, active amplitude and phase compensation will be needed. High order aberrations can arise from both non linearity and Fresnel propagation, their wavelength dependence is studied here and it is concluded that $\lambda$ independent errors are dominant. The behavior of a Michelson interferometer equipped with two deformable mirrors under chromatic light is then presented, and an achromatization method based on a dispersive element is suggested.

Type
Contributed Papers
Copyright
© 2006 International Astronomical Union