Hostname: page-component-848d4c4894-2pzkn Total loading time: 0 Render date: 2024-06-01T06:22:53.813Z Has data issue: false hasContentIssue false
  • English
  • Français

Optical Non-Linearities in Infrared Mircospectroscopy: A Preliminary Study into the Effects of Sample Size and Shape on Photometric Accuracy

Published online by Cambridge University Press:  02 July 2020

S.A. Stewart  and
A.J. Sommer
S.A. Stewart
Affiliation:
Molecular Microspectroscopy Laboratory, Dept. of Chemistry, Miami University, Oxford, OH45056
A.J. Sommer
Affiliation:
Molecular Microspectroscopy Laboratory, Dept. of Chemistry, Miami University, Oxford, OH45056
Get access

Extract

Several years ago this laboratory reported on the effects of stray light in an infrared microscope and its consequences on the spatial resolution achievable in a typical line scan or mapping experiment of a polymer film. In this study it was demonstrated that unless the size of the sampled area was greater than twice the wavelength of light employed for the analysis, a significant amount of stray light from near neighbors was contained in the sampled areas. Further, this generalization is only valid for sample sizes above the diffraction limit. The results of this study are summarized in Table. The ratio of the sampled area to that of the aperture size (corresponding to expected sample size) can be thought of as a degradation factor in spatial resolution. In this earlier study the sample geometry was chosen to minimize stray light effects arising from the sample size and shape.

Type
Optical Microanalysis
Information
Microscopy and Microanalysis , Volume 3 , Issue S2: Proceedings: Microscopy & Microanalysis '97, Microscopy Society of America 55th Annual Meeting, Microbeam Analysis Society 31st Annual Meeting, Histochemical Society 48th Annual Meeting, Cleveland, Ohio, August 10-14, 1997 , August 1997 , pp. 837 - 838
Copyright
Copyright © Microscopy Society of America 1997

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1.Sommer, A.J.and Katon, J.E., Applied Spectroscopy, 45 (1991), 1633.10.1366/0003702914335229CrossRefGoogle Scholar
2.Reffner, J.andMartoglio, P.A., Practical Guide to Infrared Microspectroscopy, Marcel Dekker (1995).Google Scholar