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Applied Optics

Applied Optics


  • Vol. 41, Iss. 14 — May. 10, 2002
  • pp: 2607–2612

Influence of illuminating beyond the object support on Zernike-type phase contrast filtering

David Sánchez-de-la-Llave and Marcelo D. Iturbe Castillo  »View Author Affiliations

Applied Optics, Vol. 41, Issue 14, pp. 2607-2612 (2002)

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A general analysis of the image fill-factor influence on Zernike-type phase contrast filtering is presented. We define image fill factor as the ratio of the object support area over the illuminating area. We first consider binary-phase objects and then generalize to arbitrarily quantized and continuous-phase objects. Numerical simulations are presented for binary- and quadratic-phase objects, where the contrast of the output image is evaluated as a function of the image fill factor, image phase variations, and filter phase. The results obtained show that the image fill factor can significantly modify the contrast and irradiance of the contrasted image.

© 2002 Optical Society of America

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

Original Manuscript: October 26, 2001
Revised Manuscript: January 18, 2002
Published: May 10, 2002

David Sánchez-de-la-Llave and Marcelo D. Iturbe Castillo, "Influence of illuminating beyond the object support on Zernike-type phase contrast filtering," Appl. Opt. 41, 2607-2612 (2002)

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