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Article | REF: R1390 V1

Surface metrology

Author: Patrick BOUCHAREINE

Publication date: September 10, 1999

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2. Two-dimensional spatial frequencies

The notion of spatial frequencies is very useful for understanding the geometric structure of a surface. This notion is complicated by the fact that we are in two dimensions, and two frequencies of the same period can differ in direction (figure 2 ). The representation of a two-dimensional function by its spectrum is less intuitive than that of a temporal signal, but the mathematical formalism of the Fourier transform is quite comparable.

The notions of autocorrelation function and power spectral density,...

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Two-dimensional spatial frequencies
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