Chemical Mapping in the Mid- and Near-IR Spectral Regions by Hadamard Transform/FT-IR Spectrometry
- 1 April 1997
- journal article
- Published by SAGE Publications in Applied Spectroscopy
- Vol. 51 (4) , 477-486
- https://doi.org/10.1366/0003702971940747
Abstract
A movable two-dimensional (2D) Hadamard encoding mask is obtained and combined with conventional FT-IR spectrometers for use in both the mid- and near-infrared spectral regions. Chemical maps and spectra of individual pixels of the maps can be obtained from heterogeneous samples by using this combination of a move-able 2D Hadamard encoding mask and an FT-IR spectrometer. We call the procedure Hadamard transform/FT-IR spectrometry. Spectra of usable signal-to-noise ratio and reliable chemical maps are obtained in reasonable data acquisition and processing time.Keywords
This publication has 34 references indexed in Scilit:
- A Hadamard-multiplexed spectrometer based on an acousto-optic tunable filterIEEE Transactions on Instrumentation and Measurement, 1996
- Application of a Two-Dimensional Hadamard Encoding Mask for the Imaging of Thin-Layer Chromatography Plates by Laser-Induced Fluorescence or Surface-Enhanced Raman Scattering and for Use with a Photoacoustic Detector to Generate Three-Dimensional Photoacoustic ImagesApplied Spectroscopy, 1993
- Hadamard Transform Photoacoustic Spectrometry and Depth ProfilingApplied Spectroscopy, 1993
- On the Mean-Square Error of Various Spectrum-Recovery Techniques in Hadamard Transform SpectrometryApplied Spectroscopy, 1990
- Implementation problems in Hadamard transform spectrometryIEEE Transactions on Instrumentation and Measurement, 1990
- An Efficient Method for Recovering the Optimal Unbiased Linear Spectrum-Estimate from Hadamard Transform Spectrometers Having Nonideal MasksApplied Spectroscopy, 1989
- A Fast Spectrum-Recovery Method for Hadamard Transform Spectrometers Having Nonideal MasksApplied Spectroscopy, 1989
- The Effect of a Single Defective Mask Element on the Multiplex Advantage in Hadamard Transform SpectroscopyApplied Spectroscopy, 1989
- The feasibility of near-infrared electrooptic Hadamard transform Raman spectrometrySpectrochimica Acta Part A: Molecular Spectroscopy, 1987
- Multiplex advantage in Hadamard transform spectrometry utilizing solid-state encoding masks with uniform, bistable optical transmission defectsApplied Optics, 1987