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Updated: Jul 6, 2026

Clarifying and Imaging Candida albicans Biofilms
Published on: March 6, 2020
Aberration-free imaging with an aplanatic curved diffractive element
Abstract:
We demonstrate an imaging diffractive optical element (DOE) that is free of coma and other first-order aberrations. The DOE was holographically recorded on a properly curved surface and thereby satisfies the Abbe sine (aplanatic) condition. Experimental results as well as numerical ray-tracing simulations indicate that the off-axis aberrations of the curved DOE are much smaller than those of a flat DOE. Because the recording of the DOE involves a single step and only readily available spherical and plane waves, it is extremely simple.
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