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. 2010 Jun 28;1(1):17–30. doi: 10.1364/BOE.1.000017

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©2010 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. 5 — Depth-resolved Raman photons collected from different tissue depths using the Raman probe designs with different refractive indices of the ball lens (n = 1.46, 1.51, 1.63, 1.76 and 1.83). Note that for comparison purpose, the depth-resolved Raman intensity profiles with different refractive indices of the ball lens have been vertically shifted to different intensity levels.