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. 1993 Jul-Aug;98(4):415–445. doi: 10.6028/jres.098.032

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The Journal of Research of the National Institute of Standards and Technology is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright.

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Fig. 17 — Effects of sample contamination on the measured profile, (a) Original scan, (b) Scan after intentionally allowing the sample to become contaminated.