Diffraction-Induced Stray Light in Infrared Microspectroscopy and Its Effect on Spatial Resolution

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Model experiments were conducted in an effort to quantitatively assess the extent of stray light, resulting from diffraction, in an FT-IR microscope system. The effects of stray light were studied under conditions employing different aperturing modes, aperture sizes, and wavelengths of light. Results and consequences of the findings are discussed with respect to the spatial resolution and quantitative integrity of the data obtainable in mapping analyses of multilayer polymer laminates.

Keywords: Diffraction effects; Infrared microspectroscopy; Mapping analysis; Polymer laminates; Quantitative analysis; Spatial resolution

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702914335229

Affiliations: Molecular Microspectroscopy Laboratory, Department of Chemistry, Miami University, Oxford, Ohio 45056

Publication date: December 1, 1991

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