Abstract

Stellar speckle images are often truncated by the edges of the image detector. It is shown that even modest amounts of image truncation can cause important errors in the second-order spectra of speckle interferometry and the Knox–Thompson algorithm. A method is presented for estimating an approximate upper bound on the truncation error given the telescope, atmospheric seeing, detector size, and spatial sampling rate. Reconstructed images of the triple star ADS 11344 from simulations and from real data illustrate the distortions and negative artifacts caused by image truncations.

© 1992 Optical Society of America

Phase errors in near-axis bispectral stellar image reconstruction

Julian Meng and George J. M. Aitken
J. Opt. Soc. Am. A 11(6) 1736-1747 (1994)

Signal transfer function of the Knox–Thompson speckle imaging technique

Oskar von der Lühe
J. Opt. Soc. Am. A 5(5) 721-729 (1988)

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)

Restoration of images degraded by atmospheric turbulence and detection noise

Xiaotian Shi and Rabab K. Ward
J. Opt. Soc. Am. A 9(3) 364-370 (1992)

Effects of finite spectral bandwidth and focusing error on the transfer function in stellar speckle interferometry

Junji Ohtsubo
J. Opt. Soc. Am. A 2(5) 667-673 (1985)