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Whack-a-speckle: Focal Plane Wavefront Sensing in Theory and Practice with a Deformable Secondary Mirror and5-micron Camera

【摘要】Long exposures from adaptive optic systems show a diffraction limited core superimposed on a halo of uncorrected light from a science target, and the addition of various long-lived speckles that arise from uncorrected aberrations in the telescope system. The presence of these speckles limit the detection of extra-solar planets at a few diffraction widths from the primary source. Focal plane wavefront sensing uses the deformable secondary mirror of the MMT adaptive optics system to systematically remove the presence of long-lived speckles in a high-contrast image, and also test for the incoherent source that represents a separate astronomical target nearby. We use the Clio 5 micron camera (with its coronagraphic capabilities) to modulate long lived speckles and present initial on-sky results of this technique.

【會議名稱】 Advances in Adaptive Optics II pt.2

【會議地點】OrlandoFL(US)

【作者】Matthew A. Kenworthy;Philip M. Hinz;J. Roger P. Angel;Ari N. Heinze;Suresh Sivanam;

【作者單位】Steward Observatory, 933 North Cherry Avenue, Tucson, AZ 85721, USA;

【會議組織】

【會議召開年】2006

【頁碼】P.62723B.1-62723B.7

【總頁數】7

【原文格式】PDF

【正文語種】eng

【中圖分類】P111.3;TH751;

【關鍵詞】adaptive optics;wavefront sensing;mid infra-red;

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