Abstract

Real photon-counting detectors are unable to distinguish overlapping photon events. This defect limits considerably the performance of speckle-imaging methods. In particular, this defect results in the so-called photon-counting hole in the center of the average image autocorrelation. Cross-correlation techniques are investigated, and it is demonstrated that they avoid the photon-counting defect for the purpose of speckle imaging with the bispectrum and the Knox–Thompson methods. Furthermore, a method that requires the recording of only two sets of simultaneous images is proposed for obtaining a quasi-unbiased estimator of the bispectrum. The validity of these methods is checked against simulated data and under various flux levels. Signal-to-noise-ratio considerations are addressed.

© 1997 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Influence of higher-order correlations on average autocorrelation in photon-counting speckle interferometry

Noriaki Miura and Naoshi Baba
J. Opt. Soc. Am. A 12(7) 1534-1541 (1995)

Estimation of the photon-counting hole in the autocorrelation and triple correlation of clipped data

P. Prieto and M. P. Cagigal
J. Opt. Soc. Am. A 11(11) 2887-2891 (1994)

Reconstruction of photon-limited stellar images by generalized projections with use of the self-cross spectrum

Xiaotian Shi and Rabab K. Ward
J. Opt. Soc. Am. A 11(5) 1589-1598 (1994)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (66)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription