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Applied Optics

Applied Optics


  • Vol. 39, Iss. 13 — May. 1, 2000
  • pp: 2101–2106

Fringe modulation skewing effect in white-light vertical scanning interferometry

Akiko Harasaki and James C. Wyant  »View Author Affiliations

Applied Optics, Vol. 39, Issue 13, pp. 2101-2106 (2000)

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An interference fringe modulation skewing effect in white-light vertical scanning interferometry that can produce a batwings artifact in a step height measurement is described. The skewing occurs at a position on or close to the edge of a step in the sample under measurement when the step height is less than the coherence length of the light source used. A diffraction model is used to explain the effect.

© 2000 Optical Society of America

OCIS Codes
(120.6650) Instrumentation, measurement, and metrology : Surface measurements, figure
(120.6660) Instrumentation, measurement, and metrology : Surface measurements, roughness
(180.3170) Microscopy : Interference microscopy

Original Manuscript: September 7, 1999
Revised Manuscript: January 13, 2000
Published: May 1, 2000

Akiko Harasaki and James C. Wyant, "Fringe modulation skewing effect in white-light vertical scanning interferometry," Appl. Opt. 39, 2101-2106 (2000)

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