Correction of coherence gate curvature in high numerical aperture optical coherence imaging
Optics Letters, Vol. 35, Issue 18, pp. 3120-3122 (2010)
http://dx.doi.org/10.1364/OL.35.003120
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Abstract
We present a method for correcting coherence gate curvature caused by scanning-induced path length variations in spectral-domain high-NA optical coherence imaging systems. These variations cause curvature artifacts in optical coherence tomography and effectively restrict the field of view in optical coherence microscopy (OCM). Here we show that the coherence gate curvature can be measured and corrected by recovering the phase of the analytic signal from a calibration image. This phase information can be used directly to process OCM images allowing the coherence gate curvature, as well as any order of system dispersion, to be corrected in a computationally efficient manner. We also discuss the use of various image quality metrics that can be used to adjust the calibrated phase in order to keep the coherence and confocal gates aligned in tissue.
© 2010 Optical Society of America
OCIS Codes
(170.1650) Medical optics and biotechnology : Coherence imaging
(170.4500) Medical optics and biotechnology : Optical coherence tomography
(180.1655) Microscopy : Coherence tomography
ToC Category:
Medical Optics and Biotechnology
History
Original Manuscript: June 24, 2010
Revised Manuscript: August 14, 2010
Manuscript Accepted: August 22, 2010
Published: September 15, 2010
Virtual Issues
Vol. 5, Iss. 14 Virtual Journal for Biomedical Optics
Citation
Benedikt W. Graf, Steven G. Adie, and Stephen A. Boppart, "Correction of coherence gate curvature in high numerical aperture optical coherence imaging," Opt. Lett. 35, 3120-3122 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-18-3120
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