Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing liquid or solid sample
Patent
1997-06-13
1999-11-09
Snay, Jeffrey
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing liquid or solid sample
385131, 385 12, G01N 2100
Patent
active
059808314
ABSTRACT:
We have fabricated miniature planar IR waveguides of thickness 30-50 .mu.m, consisting of 12-mm long, 2-mm wide strips of Ge supported on ZnS substrates. Evidence for efficient propagation of broadband IR light through these waveguides is provided by the presence of characteristic high and low frequency optical cut-offs of Ge; by the observation of an oscillatory interference pattern in the transmittance spectrum, which exhibits a dependence on waveguide thickness and propagation angle closely matching waveguide theory; and by the detection of strong evanescent-wave absorption from small (2 mm.sup.2) droplets of liquid, e.g. water, on the waveguide surface. As also predicted by theory, the surface sensitivity (detected light absorbance per unit area of sample-waveguide contact) was shown to increase as a function of incidence or bevel angle.
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Design for Supported Planar Waveguides for Obtaining Mid-IR Evanescent-Wave Absorption Spectra from Biomembranes of Individual Cells,Mark S. Braiman and Susan E. Plunkett, vol. 51, No. 4, Apr. 1997, Applied Spectroscopy, pp. 592-597.
Mid-IR evanescent-wave absorption spectra of thin films and coatings measured with a .about.50-um-thick planar Ge waveguide sensors, James J. Stone, Mark S. Braiman and Susan E. Plunkett, Published Jun. 15, 1997, Process SPIE.
Braiman Mark S.
Plunkett Susan E.
Stone James J.
Parker Sheldon H.
Snay Jeffrey
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