APPLICATION OF IMAGE SHARPNESS CRITERIA IN INFRARED SPECKLE INTERFEROMETRY.

Donald W Mccarthy, M. L. Cobb

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Current techniques for infrared speckle interferometry treat all exposures with equal weight regardless of instantaneous atmospheric 'seeing'. In an effort to improve accuracy in measurements of visibility amplitude and phase, we utilize measurements of image quality to bin individual exposures. We have investigated several criteria including the second-order moment of the image (an estimate of the Fried parameter) and two sharpness functions considered previously in adaptive optics applications. Test results on bright stars indicate that the sharpness parameters are more sensitive to image quality. These tests also delineate the correlation between sharpness and the second-order moment and demonstrate the variations, sometimes periodic, in image quality caused by atmospheric seeing. Initial tests of a binning technique using real astronomical data exhibit improved accuracy and reduced sensitivity to atmospheric fluctuations.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsDavid L. Crawford
PublisherSPIE
Pages797-804
Number of pages8
Volume627
Editionpt 2
ISBN (Print)0892526629
StatePublished - 1986

Fingerprint

speckle interferometry
sharpness
Speckle
Interferometry
Image quality
Infrared radiation
Adaptive optics
Bins
moments
Visibility
Stars
adaptive optics
visibility
periodic variations
stars
sensitivity
estimates

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Mccarthy, D. W., & Cobb, M. L. (1986). APPLICATION OF IMAGE SHARPNESS CRITERIA IN INFRARED SPECKLE INTERFEROMETRY. In D. L. Crawford (Ed.), Proceedings of SPIE - The International Society for Optical Engineering (pt 2 ed., Vol. 627, pp. 797-804). SPIE.

APPLICATION OF IMAGE SHARPNESS CRITERIA IN INFRARED SPECKLE INTERFEROMETRY. / Mccarthy, Donald W; Cobb, M. L.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / David L. Crawford. Vol. 627 pt 2. ed. SPIE, 1986. p. 797-804.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Mccarthy, DW & Cobb, ML 1986, APPLICATION OF IMAGE SHARPNESS CRITERIA IN INFRARED SPECKLE INTERFEROMETRY. in DL Crawford (ed.), Proceedings of SPIE - The International Society for Optical Engineering. pt 2 edn, vol. 627, SPIE, pp. 797-804.
Mccarthy DW, Cobb ML. APPLICATION OF IMAGE SHARPNESS CRITERIA IN INFRARED SPECKLE INTERFEROMETRY. In Crawford DL, editor, Proceedings of SPIE - The International Society for Optical Engineering. pt 2 ed. Vol. 627. SPIE. 1986. p. 797-804
Mccarthy, Donald W ; Cobb, M. L. / APPLICATION OF IMAGE SHARPNESS CRITERIA IN INFRARED SPECKLE INTERFEROMETRY. Proceedings of SPIE - The International Society for Optical Engineering. editor / David L. Crawford. Vol. 627 pt 2. ed. SPIE, 1986. pp. 797-804
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