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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 5, Iss. 8 — Aug. 1, 2014
  • pp: 2563–2579

Improving high resolution retinal image quality using speckle illumination HiLo imaging

Xiaolin Zhou, Phillip Bedggood, and Andrew Metha  »View Author Affiliations


Biomedical Optics Express, Vol. 5, Issue 8, pp. 2563-2579 (2014)
http://dx.doi.org/10.1364/BOE.5.002563


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Abstract

Retinal image quality from flood illumination adaptive optics (AO) ophthalmoscopes is adversely affected by out-of-focus light scatter due to the lack of confocality. This effect is more pronounced in small eyes, such as that of rodents, because the requisite high optical power confers a large dioptric thickness to the retina. A recently-developed structured illumination microscopy (SIM) technique called HiLo imaging has been shown to reduce the effect of out-of-focus light scatter in flood illumination microscopes and produce pseudo-confocal images with significantly improved image quality. In this work, we adopted the HiLo technique to a flood AO ophthalmoscope and performed AO imaging in both (physical) model and live rat eyes. The improvement in image quality from HiLo imaging is shown both qualitatively and quantitatively by using spatial spectral analysis.

© 2014 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(170.4460) Medical optics and biotechnology : Ophthalmic optics and devices
(330.4875) Vision, color, and visual optics : Optics of physiological systems

ToC Category:
Ophthalmology Applications

History
Original Manuscript: May 5, 2014
Revised Manuscript: June 30, 2014
Manuscript Accepted: June 30, 2014
Published: July 10, 2014

Citation
Xiaolin Zhou, Phillip Bedggood, and Andrew Metha, "Improving high resolution retinal image quality using speckle illumination HiLo imaging," Biomed. Opt. Express 5, 2563-2579 (2014)
http://www.opticsinfobase.org/boe/abstract.cfm?URI=boe-5-8-2563


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