Penny 3 – Lincoln

White light interferometer (3D optical profiler) image of surface texture of a penny zoomed - Digital Metrology -

This series of data captures a US one cent coin with two different systems, at 3 resolutions:

  • PennyBack-Lincoln, this dataset, measured with a Zygo NewView 8300 at 10x.
  • PennyBack-LincolnAndPillars, measured with a Zygo NewView 8300 at 2.75x.
  • Penny-All shows the entire back of the coin, measured with a Keyence VR-3100 at 12x.

We featured this data in our blog post, How much does it cost to compare measurement systems? because it helps to highlight the difference in lateral resolution and  field of view between various measurement technologies.

This dataset (PennyBack-Lincoln), taken with the NewView at 10x, shows the figure of Abraham Lincoln in the Memorial on the back of the penny:

White light interferometer (3D optical profiler) image of surface texture of a penny zoomed - Digital Metrology -

For this dataset, removing a plane (Analysis Settings > Geometry/Form > Plane) results in a good representation of the surface. 

 

Compare the resolution and field of view to that of the PennyBack-LincolnAndPillars data, taken with Zygo NewView 8300 at 2.75x:

White light interferometer (3D optical profiler) image of surface texture of a penny zoomed - Digital Metrology -

and the Keyence VR data of the full Penny data, in which we can just barely make out Abe Lincoln seated between the columns:

Surface Texture of a United States One Cent Penny Coin - Digital Metrology Solutions

 

Data source:  Digital Metrology Solutions (www.digitalmetrology.com)

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How to cite

If you use this dataset, please reference it as follows:

Digital Metrology Solutions. “Surface Library.” Digitalmetrology, digitalmetrology.com/dataset/penny-3-white-light-interferometer-10x. Accessed Sep 25, 2023.