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Figure 3
Measurement of the sheet thickness from the thin-film interference fringe pattern. (A) Image of a sheet reflecting diffused monochromatic light with the areas used to define the centerline and background marked in blue and orange, respectively. (B) Pixel brightness and background as a function of the distance to the nozzle. Local extrema representing light and dark fringes are marked in red. (C) Thickness derived from the brightness measurement.

IUCrJ
Volume 13| Part 5| September 2026| Pages 659-667
ISSN: 2052-2525
https://doi.org/10.1107/S2052252526007013