The use of a pseudo-randomly modulated optical beam and a cross-correlation signal recovery technique to obtain impulse response photoacoustic signals is demonstrated. The application of this technique to provide depth-related physical and chemical information from plant tissues is described.
G. F. Kirkbright, R. M. Miller, D. E. M. Spillane and I. P. Vickery, Analyst, 1984, 109, 1443 DOI: 10.1039/AN9840901443
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