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Abstract: Dual OCT/SLO Imager with Three-Dimensional Tracker
Daniel X. Hammer, Nicusor V. Iftimia, Teoman E. Ustun, John C. Magill, R. Daniel Ferguson,
"Dual OCT/SLO Imager with Three-Dimensional Tracker
,"
presented at SPIE Photonics West
(San Jose, CA)
,
(22-27 January2005).
Copyright © 2005 Society of Photo-Optical Instrumentation Engineers.
This paper was published in SPIE Photonics West,
and is made available as an electronic reprint (preprint)
with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple
reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this
paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Abstract
We have designed, developed, and tested a three-dimensional tracking and imaging system that uses a novel optical layout to acquire both en-face confocal images by scanning laser imaging (e.g. scanning laser ophthalmoscopy, SLO) and high-resolution depth sections by optical coherence tomography (OCT). The present application for this system is retinal imaging. The instrument is capable of sequentially collecting OCT and SLO images with the simple articulation of an optic affixed to a flip-mount. In addition, we have extended our mature transverse tracking system for full threedimensional
motion stabilization. The tracking component employs an innovative optical and electronic design that encodes transverse and depth tracking information on a single beam. We have demonstrated en face SLO imaging with
a resolution of ~25 µm and depth-resolved OCT imaging with a resolution of ~10 µm. On artificial targets, transverse tracking was robust up to 1 m/s with a bandwidth of ~1 kHz and depth tracking was robust up to a velocity of ~15 cm/sec, a range of ~1 mm, and a bandwidth of a few hundred Hz. The details of the instrument, including optical and electronic design, are discussed. The system has the potential to provide clinicians and researchers with a wide variety of diagnostic information for the early detection and treatment of retinal diseases.
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