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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. 5, Iss. 10 — Jul. 19, 2010

Scanning system design for large scan depth anterior segment optical coherence tomography

Rahul Yadav, Kamran Ahmad, and Geunyoung Yoon  »View Author Affiliations


Optics Letters, Vol. 35, Issue 11, pp. 1774-1776 (2010)
http://dx.doi.org/10.1364/OL.35.001774


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Abstract

In telecentric scanning a large lateral scan area leads to an increase in the angle of incidence on each of the four anterior ocular surfaces (two for the cornea and two for the crystalline lens), causing significant reduction in the signal obtained from regions farther from the optical axis. We propose an optical coherence tomography scanning system, which achieves nearly normal incidences across the lateral locations of the four ocular surfaces. This provides an increase in the amount of light scattered back to the system, resulting in a higher signal-to-noise ratio (SNR). The images of a model eye obtained with the proposed scan and conventional telecentric scan were compared. SNR improvement of 5 dB and 12 dB was observed for the anterior and the posterior lens surfaces, respectively. For the posterior corneal surface SNR improvement of 4 dB was observed, while the SNR improvement for the anterior corneal surface was 0.7 dB .

© 2010 Optical Society of America

OCIS Codes
(110.0110) Imaging systems : Imaging systems
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology
(330.0330) Vision, color, and visual optics : Vision, color, and visual optics

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: March 29, 2010
Manuscript Accepted: April 16, 2010
Published: May 19, 2010

Virtual Issues
Vol. 5, Iss. 10 Virtual Journal for Biomedical Optics

Citation
Rahul Yadav, Kamran Ahmad, and Geunyoung Yoon, "Scanning system design for large scan depth anterior segment optical coherence tomography," Opt. Lett. 35, 1774-1776 (2010)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-35-11-1774

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