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Title: Three filters for visualization of phase objects with large variations of phase gradients

Journal Article · · Applied Optics
DOI:https://doi.org/10.1364/AO.48.001143· OSTI ID:21175992

We propose three amplitude filters for visualization of phase objects. They interact with the spectra of pure-phase objects in the frequency plane and are based on tangent and error functions as well as antisymmetric combination of square roots. The error function is a normalized form of the Gaussian function. The antisymmetric square-root filter is composed of two square-root filters to widen its spatial frequency spectral range. Their advantage over other known amplitude frequency-domain filters, such as linear or square-root graded ones, is that they allow high-contrast visualization of objects with large variations of phase gradients.

OSTI ID:
21175992
Journal Information:
Applied Optics, Vol. 48, Issue 6; Other Information: DOI: 10.1364/AO.48.001143; (c) 2009 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6935
Country of Publication:
United States
Language:
English