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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 6 — Feb. 20, 2009
  • pp: 1143–1152

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

Arkadiusz Sagan, Tomasz J. Antosiewicz, and Tomasz Szoplik  »View Author Affiliations


Applied Optics, Vol. 48, Issue 6, pp. 1143-1152 (2009)
http://dx.doi.org/10.1364/AO.48.001143


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Abstract

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.

© 2009 Optical Society of America

OCIS Codes
(070.0070) Fourier optics and signal processing : Fourier optics and signal processing
(070.1170) Fourier optics and signal processing : Analog optical signal processing
(070.6110) Fourier optics and signal processing : Spatial filtering
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

ToC Category:
Fourier Optics and Signal Processing

History
Original Manuscript: November 10, 2008
Revised Manuscript: January 7, 2009
Manuscript Accepted: January 23, 2009
Published: February 17, 2009

Citation
Arkadiusz Sagan, Tomasz J. Antosiewicz, and Tomasz Szoplik, "Three filters for visualization of phase objects with large variations of phase gradients," Appl. Opt. 48, 1143-1152 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-6-1143

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