Abstract
We comment on a Letter by Toytman et al. [Opt. Lett. 32, 1941 (2007)] in which a novel setup for wide-field imaging in coherent anti-Stokes Raman scattering (CARS) microscopy is demonstrated. There the authors state that our phase-matching implementation of a wide-field CARS system [Appl. Phys. Lett. 84, 816 (2004) ; New J. Phys. 8, 36 (2006) ] suffers from a strong background from the bulk medium. However, our results show quite the contrary, i.e., that our setup provides a very good signal contrast, due to an almost vanishing background level from the bulk solvent.
© 2007 Optical Society of America
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