TY - GEN
T1 - Halo measurement using phase-sorting interferometry
AU - Codona, Johanan L.
AU - Kenworthy, Matthew
AU - Hart, Michael
PY - 2011
Y1 - 2011
N2 - Imperfections, misalignments, aberrations, and even dust can significantly limit sensitivity in high-contrast imaging systems such as coronagraphs. An upstream deformable mirror (DM) can be used to correct or compensate for these flaws. To include non-common-path errors introduced after the an AO system closed loop, correcting measurements must be made with the science camera. Measurement of the phase and amplitude of a star's halo is sufficient to compute a compensating pupil DM shape that suppresses the scattered halo. Phase-Sorting Interferometry (PSI) is a technique that uses AO residual starlight speckles and wavefront sensor measurements to estimate the complex halo. We have demonstrated PSI on-sky at the 6.5m MMTO telescope using mid-IR L and M-band images.
AB - Imperfections, misalignments, aberrations, and even dust can significantly limit sensitivity in high-contrast imaging systems such as coronagraphs. An upstream deformable mirror (DM) can be used to correct or compensate for these flaws. To include non-common-path errors introduced after the an AO system closed loop, correcting measurements must be made with the science camera. Measurement of the phase and amplitude of a star's halo is sufficient to compute a compensating pupil DM shape that suppresses the scattered halo. Phase-Sorting Interferometry (PSI) is a technique that uses AO residual starlight speckles and wavefront sensor measurements to estimate the complex halo. We have demonstrated PSI on-sky at the 6.5m MMTO telescope using mid-IR L and M-band images.
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M3 - Conference contribution
AN - SCOPUS:84893575737
SN - 9781557529145
T3 - Optics InfoBase Conference Papers
BT - Applied Industrial Optics
T2 - Applied Industrial Optics: Spectroscopy, Imaging and Metrology, AIO 2011
Y2 - 10 July 2011 through 14 July 2011
ER -