Abstract

In this communication, we describe the application of Hadamard transform Raman microscopy to the imaging of edge plane microstructures in laser-modified highly ordered pyrolitic graphite (HOPG) electrodes. Hadamard transform Raman microscopy is a highly selective method of analysis which can image thermally sensitive materials at micron-scale spatial resolution. The technique is capable of imaging relatively weak Raman scatterers in only a few minutes. The current multichannel microscope generates images having 255 × 256 pixels. In addition, we characterize an imaging artifact present in our current system, as well as apply a first-order correction for the problem.

Fast delta Hadamard transform

E. E. Fenimore and G. S. Weston
Appl. Opt. 20(17) 3058-3067 (1981)

Hadamard multiplexing in laser ultrasonics

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Hadamard-transform spectral acquisition with an acousto-optic tunable filter in a broadband stimulated Raman scattering microscope

Luca Genchi, Andrea Bucci, Sergey P. Laptenok, Alessandro Giammona, and Carlo Liberale
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Hadamard–Transform Image Scanning

J. A. Decker
Appl. Opt. 9(6) 1392-1395 (1970)

Hadamard transform imager and imaging spectrometer

Roderick D. Swift, Richard B. Wattson, John A. Decker, Ralph Paganetti, and Martin Harwit
Appl. Opt. 15(6) 1595-1609 (1976)