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. 2011 Nov 4;2(12):3232–3247. doi: 10.1364/BOE.2.003232

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©2011 Optical Society of America

This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Unported License, which permits download and redistribution, provided that the original work is properly cited. This license restricts the article from being modified or used commercially.

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Fig. 6 — a) Difference map (sOCT elevation map – profilometric elevation map), without fan distortion correction. b) Difference map (sOCT elevation map – profilometric elevation map), with fan distortion correction, for a spherical surface. c) Second and fourth order astigmatism Zernike terms from a Zernike polynomial fit to the surfaces for sOCT topographies without fan distortion correction (red) and with fan distortion correction (green). Data in μm are averages across 5 repeated measurements for each instrument, and 6-mm diameter zones.