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Open-loop wavefront sensing in the presence of speckle and weak scintillation.

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Title: Open-loop wavefront sensing in the presence of speckle and weak scintillation.
Authors: Burrell, Derek J.1 (AUTHOR) derekburrell@optics.arizona.edu, Spencer, Mark F.2 (AUTHOR), Driggers, Ronald G.1 (AUTHOR)
Source: Optics Communications. Dec2024, Vol. 572, pN.PAG-N.PAG. 1p.
Subjects: Meteorological optics, Surface scattering, Adaptive optics, Atmospheric turbulence, Wavefront sensors
Abstract: In this paper, we show that speckle averaging helps to reduce the measurement error associated with a Shack–Hartmann wavefront sensor (SHWFS); however, this reduction is rendered ineffective with increasing beacon anisoplanatism. We do so operating in a weak-scintillation regime, where the SHWFS offers robust performance, and using in-plane translation of the illuminated rough surface to accomplish frame-to-frame speckle diversity. Understanding these trade-space limitations is critical when performing wavefront sensing with noncooperative, extended-source beacons. • We derive analytic estimates for RMS wavefront error/aberration in vacuum/turbulence. • We present a new modeling framework to simulate partially correlated speckle frames. • We report simulation results in wavefront error/aberration and irradiance skewness. • We demonstrate the benefits of speckle averaging under isoplanatic conditions. • We identify potential drawbacks of speckle averaging in anisoplanatic conditions. [ABSTRACT FROM AUTHOR]
Copyright of Optics Communications is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: <searchLink fieldCode="JN" term="%22Optics+Communications%22">Optics Communications</searchLink>. Dec2024, Vol. 572, pN.PAG-N.PAG. 1p.
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  Data: In this paper, we show that speckle averaging helps to reduce the measurement error associated with a Shack–Hartmann wavefront sensor (SHWFS); however, this reduction is rendered ineffective with increasing beacon anisoplanatism. We do so operating in a weak-scintillation regime, where the SHWFS offers robust performance, and using in-plane translation of the illuminated rough surface to accomplish frame-to-frame speckle diversity. Understanding these trade-space limitations is critical when performing wavefront sensing with noncooperative, extended-source beacons. • We derive analytic estimates for RMS wavefront error/aberration in vacuum/turbulence. • We present a new modeling framework to simulate partially correlated speckle frames. • We report simulation results in wavefront error/aberration and irradiance skewness. • We demonstrate the benefits of speckle averaging under isoplanatic conditions. • We identify potential drawbacks of speckle averaging in anisoplanatic conditions. [ABSTRACT FROM AUTHOR]
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  Group: Ab
  Data: <i>Copyright of Optics Communications is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.optcom.2024.130960
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Meteorological optics
        Type: general
      – SubjectFull: Surface scattering
        Type: general
      – SubjectFull: Adaptive optics
        Type: general
      – SubjectFull: Atmospheric turbulence
        Type: general
      – SubjectFull: Wavefront sensors
        Type: general
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      – TitleFull: Open-loop wavefront sensing in the presence of speckle and weak scintillation.
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            NameFull: Spencer, Mark F.
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            – D: 01
              M: 12
              Text: Dec2024
              Type: published
              Y: 2024
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              Value: 572
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