Optical misalignment sensing and image reconstruction using phase diversity

Details Optical misalignment sensing and image reconstruction using phase diversity Optical misalignment sensing and image reconstruction using phase diversity

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988josaa...5..914p&link_type=abstract

Optical Society of America, Journal, A: Optics and Image Science (ISSN 0740-3232), vol. 5, June 1988, p. 914-923.

Physics

Optics

37

Image Reconstruction, Misalignment, Phased Arrays, Synthetic Apertures, Alignment, Iterative Solution, Phase Error

Scientific paper

The Gonsalves (1982) phase-diversity method is used to correct imagery blurred by a misaligned segmented-aperture telescope. In the present method, the usual degraded image in the focal plane and a second degraded image in an out-of-focus plane are recorded simultaneously. An iterative gradient-search algorithm determines the phase error of the telescope that is consistent with both degraded images. The final image is obtained via a Wiener-Helstrom filtering of the degraded image using the retrieved phase errors. Results are given for the example of random piston phase errors on each of six segments.

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