Raman spectra were measured using a novel experimental configuration. This configuration allows many of the difficulties associated with the collection of Raman spectra under proximal conditions to be mitigated. Large sample areas can be imaged into the detection system allowing low intensity (high power) excitation sources to be used while simultaneously avoiding sample degradation and multi-photon absorption effects. Such large detection areas allow high numbers of molecular scatters to be probed even with minimal penetration depth. Overlap of excitation and detection areas avoids alignment difficulties that plague conventional Raman while removing the focal plane making detection from near contact to proximal distances possible. Justification for the success of this optical configuration will be described along with supporting data.
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