Numerical correction of aberrations via phase retrieval with speckle illumination

Percival Almoro, Phanindra Narayan Gundu, Steen Grüner Hanson

Research output: Contribution to journalJournal articleResearchpeer-review


What we believe to be a novel technique for wavefront aberration measurement using speckle patterns is presented. The aberration correction is done numerically. A tilted lens is illuminated with a partially developed speckle field, and the transmitted light intensity is sampled at axially displaced planes. The speckle intensity patterns are then sent to a phase-retrieval algorithm to reconstruct the complete wavefront. The nature of the wavefront aberration is determined through Zernike polynomials. Numerical correction of the perturbed wavefront is performed based on rms error and the Strehl ratio. Restoration of the wavefront from a phase object with high spatial frequency content shows the effectiveness of our method. (C) 2009 Optical Society of America
Original languageEnglish
JournalOptics Letters
Issue number4
Pages (from-to)521-523
Publication statusPublished - 2009

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