Vibrational phase contrast CARS microscopy for quantitative analysis


Jurna, M. and Garbacik, E.T. and Korterik, J.P. and Otto, C. and Herek, J.L. and Offerhaus, H.L. (2010) Vibrational phase contrast CARS microscopy for quantitative analysis. In: Ammasi Periasamy & Peter T.C. So & Karsten Konig (Eds.), Multiphoton Microscopy in the Biomedical Sciences X. Proceedings of SPIE, 7569 . SPIE--The International Society for Optical Engineering, 75690F. ISBN 9780819479655

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Abstract:In biological samples the resonant CARS signal of less abundant constituents can be overwhelmed by the nonresonant background, preventing detection of those molecules. We demonstrate a method to obtain the phase of the oscillators in the focal volume that allows discrimination of those hidden molecules. The phase is measured with respect to the local excitation fields using a cascaded phase-preserving chain. It is measured point-bypoint and takes into account refractive index changes in the sample, phase curvature over the field-of-view and interferometric instabilities. The detection of the phase of the vibrational motion can be regarded as a vibrational extension of the linear (refractive index) phase contrast microscopy introduced by Zernike around 1933
Item Type:Book Section
Copyright:© 2010 COPYRIGHT SPIE--The International Society for Optical Engineering
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