corrugation
Noun
Meaning
The act corrugating; contraction into wrinkles or alternate ridges and grooves.
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Examples
The adjacent Fresnel zone is approximately given by: : The edge corrugation should not be much more than 10% of this width to see a close to ideal Arago spot.
The highest frequency (7554 Hz) was found in the “overblown” condition and n was presumed as one corrugation.
Note, that the 100 µm edge corrugation almost completely removes the central bright spot.
This corrugation gives rise to strong electric field gradients in the near-tip zone (on the order of an atomic radii or less from the tip), which during ionisation deflects ions away from the electric field normal.