Phase-modulated pupil for achromatic imaging of faint companions

Details Phase-modulated pupil for achromatic imaging of faint companions Phase-modulated pupil for achromatic imaging of faint companions

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003phla..320....5y&link_type=abstract

Physics Letters A, Volume 320, Issue 1, p. 5-8.

Physics

2

Phase Modulation, Imaging, Diffraction, Destructive Interference, Extra-Solar Planets, Deformable Mirrors

Scientific paper

Planets outside our solar system may harbour life but their faint images are lost in the bright diffraction haloes of their parent stars. Here we show with a simple example that it is possible to suppress the star haloes without substantially weakening the planet signal if starlight, entering a telescope pupil, is phase-modulated in a prescribed pattern. The modulation remains effective throughout the entire visible light band and for a wide range of view angles. Furthermore, ``phase only'' modulation over the pupil suggests an attractive possibility of using a single optical element (deformable mirror) for simultaneously removing diffraction haloes and correcting phase errors.

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