Document Type

Article

Language

eng

Format of Original

15 p.

Publication Date

8-2014

Publisher

Optical Society of America

Source Publication

Biomedical Optics Express

Source ISSN

2156-7085

Original Item ID

doi: 10.1364/BOE.5.003059; PubMed Central: PMCID 4230870

Abstract

The correction of non-common path aberrations (NCPAs) between the imaging and wavefront sensing channel in a confocal scanning adaptive optics ophthalmoscope is demonstrated. NCPA correction is achieved by maximizing an image sharpness metric while the confocal detection aperture is temporarily removed, effectively minimizing the monochromatic aberrations in the illumination path of the imaging channel. Comparison of NCPA estimated using zonal and modal orthogonal wavefront corrector bases provided wavefronts that differ by ~λ/20 in root-mean-squared (~λ/30 standard deviation). Sequential insertion of a cylindrical lens in the illumination and light collection paths of the imaging channel was used to compare image resolution after changing the wavefront correction to maximize image sharpness and intensity metrics. Finally, the NCPA correction was incorporated into the closed-loop adaptive optics control by biasing the wavefront sensor signals without reducing its bandwidth.

Comments

Accepted version. Biomedical Optics Express, Vol. 5, No. 9 (August 2014): 3059-3073. DOI. © Optical Society of America 2014. Used with permission.

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