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Updated: Aug 9, 2026

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Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects
Published on: February 9, 2014
Asymmetric phase masks for extended depth of field
Albertina Castro1, Jorge Ojeda-Castañeda
1Instituto Nacional de Astrofísica, Optica y Electrónica, Apartado Postal 216, Puebla 72000, Puebla, Mexico. betina@inaoep.mx
Applied Optics
|June 29, 2004
Abstract:
We present a family of asymmetric phase masks that extends the depth of field of an optical system. To verify our proposal, we compute several modulation transfer functions with focus errors, and we report numerical simulations of the images that can be achieved by use of our proposed procedure.

