The Centroid of Speckle Image and the Wavefront Tilt

LIU Zhong; DAI Yi-chun; JIN Zhen-yu; QIU Yao-hui

Astronomical Research and Technology > 2009 > 6(2): 119-123118.

LIU Zhong, DAI Yi-chun, JIN Zhen-yu, QIU Yao-hui. The Centroid of Speckle Image and the Wavefront Tilt[J]. Astronomical Research and Technology, 2009, 6(2): 119-123118.

Citation:

LIU Zhong, DAI Yi-chun, JIN Zhen-yu, QIU Yao-hui. The Centroid of Speckle Image and the Wavefront Tilt[J]. Astronomical Research and Technology, 2009, 6(2): 119-123118.

Citation:

LIU Zhong, DAI Yi-chun, JIN Zhen-yu, QIU Yao-hui. The Centroid of Speckle Image and the Wavefront Tilt[J]. Astronomical Research and Technology, 2009, 6(2): 119-123118.

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The Centroid of Speckle Image and the Wavefront Tilt

National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China

More Information

Received Date: February 11, 2009
Revised Date: February 19, 2009
Published Date: April 14, 2009

Graphical Abstract

Abstract

Abstract

The relation between the centroid of speckle image and the wavefront tilt is discussed in this paper.The centroid of speckle image is proved mapping to the global tilt of wavefront.This relation is independent of whether the pupil aperture is larger than the atmospheric coherent length.The conclusion is not strictly limited by the near-field approximation.An important inference is that the Optical Transfer Function(OTF)of the "Shift & Add"according to the centroids of speckle images is just the traditional average short-exposure OTF given by Fried.The inference is very important to the adaptive optics and high resolution image reconstruction techniques, especially to those with the"Shift & Add"technique.
- speckle image,
- wavefront tilt,
- point spread function,
- optical transfer function

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References (7)

References

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