Application of bispectrum analysis to infrared speckle data

Julian C. Christou; Jonathan D. Freeman; Francois Roddier; Donald W. McCarthy; Michael L. Cobb; Stuart B. Shaklan

doi:10.1117/12.942076

Application of bispectrum analysis to infrared speckle data

Julian C. Christou, Jonathan D. Freeman, Francois Roddier, Donald W. McCarthy, Michael L. Cobb, Stuart B. Shaklan

Steward Observatory

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

We have applied the bispectrum algorithm to one-dimensional infrared speckle data for retrieval of diffraction limited phases. We use a standard weighting averaging technique to combine the multiple phase estimates contained in the bispectrum. We have also used the bispectrum modulus to obtain visibility amplitudes. Results, including images, are presented for three different binary stars. Simulated data has also been used to study the behaviour of the algorithm under different signal-to-noise conditions as well as a study of phase recovery for different defocus conditions. We find that the algorithm is sensitive, at a low level, to focus changes especially for noisy data. Comparison of the bispectrum phases is made with those obtained from Knox-Thompson cross-spectra for all cases.

Original language	English (US)
Pages (from-to)	32-39
Number of pages	8
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	828
DOIs	https://doi.org/10.1117/12.942076
State	Published - Jan 29 1988

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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@article{079a40e10a164ff69571c4a5649c8861,

title = "Application of bispectrum analysis to infrared speckle data",

abstract = "We have applied the bispectrum algorithm to one-dimensional infrared speckle data for retrieval of diffraction limited phases. We use a standard weighting averaging technique to combine the multiple phase estimates contained in the bispectrum. We have also used the bispectrum modulus to obtain visibility amplitudes. Results, including images, are presented for three different binary stars. Simulated data has also been used to study the behaviour of the algorithm under different signal-to-noise conditions as well as a study of phase recovery for different defocus conditions. We find that the algorithm is sensitive, at a low level, to focus changes especially for noisy data. Comparison of the bispectrum phases is made with those obtained from Knox-Thompson cross-spectra for all cases.",

author = "Christou, \{Julian C.\} and Freeman, \{Jonathan D.\} and Francois Roddier and McCarthy, \{Donald W.\} and Cobb, \{Michael L.\} and Shaklan, \{Stuart B.\}",

note = "Funding Information: This work has been sponsored by the Strategic Defense Initiative Organization, Office Of Innovative Science And Technology under contract R86-089 and managed by. the Harry Diamond Laboratories. The Steward Observatory infrared speckle system is supported by the NSF under grant AST-8519506. The National Optical Astronomy Observatories (NOAO) is operated by the Association of Universities for Research in Astronomy Inc., under contract with the National Science Foundation. D. W. McCarthy was a visiting astronomer at Kitt Peak National Observatory, operated by NOAO.",

year = "1988",

month = jan,

day = "29",

doi = "10.1117/12.942076",

language = "English (US)",

volume = "828",

pages = "32--39",

journal = "Proceedings of SPIE - The International Society for Optical Engineering",

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publisher = "SPIE",

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TY - JOUR

T1 - Application of bispectrum analysis to infrared speckle data

AU - Christou, Julian C.

AU - Freeman, Jonathan D.

AU - Roddier, Francois

AU - McCarthy, Donald W.

AU - Cobb, Michael L.

AU - Shaklan, Stuart B.

N1 - Funding Information: This work has been sponsored by the Strategic Defense Initiative Organization, Office Of Innovative Science And Technology under contract R86-089 and managed by. the Harry Diamond Laboratories. The Steward Observatory infrared speckle system is supported by the NSF under grant AST-8519506. The National Optical Astronomy Observatories (NOAO) is operated by the Association of Universities for Research in Astronomy Inc., under contract with the National Science Foundation. D. W. McCarthy was a visiting astronomer at Kitt Peak National Observatory, operated by NOAO.

PY - 1988/1/29

Y1 - 1988/1/29

N2 - We have applied the bispectrum algorithm to one-dimensional infrared speckle data for retrieval of diffraction limited phases. We use a standard weighting averaging technique to combine the multiple phase estimates contained in the bispectrum. We have also used the bispectrum modulus to obtain visibility amplitudes. Results, including images, are presented for three different binary stars. Simulated data has also been used to study the behaviour of the algorithm under different signal-to-noise conditions as well as a study of phase recovery for different defocus conditions. We find that the algorithm is sensitive, at a low level, to focus changes especially for noisy data. Comparison of the bispectrum phases is made with those obtained from Knox-Thompson cross-spectra for all cases.

AB - We have applied the bispectrum algorithm to one-dimensional infrared speckle data for retrieval of diffraction limited phases. We use a standard weighting averaging technique to combine the multiple phase estimates contained in the bispectrum. We have also used the bispectrum modulus to obtain visibility amplitudes. Results, including images, are presented for three different binary stars. Simulated data has also been used to study the behaviour of the algorithm under different signal-to-noise conditions as well as a study of phase recovery for different defocus conditions. We find that the algorithm is sensitive, at a low level, to focus changes especially for noisy data. Comparison of the bispectrum phases is made with those obtained from Knox-Thompson cross-spectra for all cases.

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VL - 828

SP - 32

EP - 39

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

ER -

Application of bispectrum analysis to infrared speckle data

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