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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 1, Iss. 6 — Jun. 13, 2006

Adaptive optics flood-illumination camera for high speed retinal imaging

Jungtae Rha, Ravi S. Jonnal, Karen E. Thorn, Junle Qu, Yan Zhang, and Donald T. Miller  »View Author Affiliations


Optics Express, Vol. 14, Issue 10, pp. 4552-4569 (2006)
http://dx.doi.org/10.1364/OE.14.004552


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Abstract

Current adaptive optics flood-illumination retina cameras operate at low frame rates, acquiring retinal images below seven Hz, which restricts their research and clinical utility. Here we investigate a novel bench top flood-illumination camera that achieves significantly higher frame rates using strobing fiber-coupled superluminescent and laser diodes in conjunction with a scientific-grade CCD. Source strength was sufficient to obviate frame averaging, even for exposures as short as 1/3 msec. Continuous frame rates of 10, 30, and 60 Hz were achieved for imaging 1.8, 0.8, and 0.4 deg retinal patches, respectively. Short-burst imaging up to 500 Hz was also achieved by temporarily storing sequences of images on the CCD. High frame rates, short exposure durations (1 msec), and correction of the most significant aberrations of the eye were found necessary for individuating retinal blood cells and directly measuring cellular flow in capillaries. Cone videos of dark adapted eyes showed a surprisingly rapid fluctuation (~1 Hz) in the reflectance of single cones. As further demonstration of the value of the camera, we evaluated the tradeoff between exposure duration and image blur associated with retina motion.

© 2006 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(060.2380) Fiber optics and optical communications : Fiber optics sources and detectors
(110.0180) Imaging systems : Microscopy
(330.4300) Vision, color, and visual optics : Vision system - noninvasive assessment
(330.5370) Vision, color, and visual optics : Physiological optics

ToC Category:
Vision, Color, and Visual Optics

History
Original Manuscript: February 21, 2006
Revised Manuscript: April 28, 2006
Manuscript Accepted: May 4, 2006
Published: May 15, 2006

Virtual Issues
Vol. 1, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Jungtae Rha, Ravi S. Jonnal, Karen E. Thorn, Junle Qu, Yan Zhang, and Donald T. Miller, "Adaptive optics flood-illumination camera for high speed retinal imaging," Opt. Express 14, 4552-4569 (2006)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-14-10-4552


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