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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 7 — Apr. 8, 2013
  • pp: 8116–8124

Point diffraction interferometer with a liquid crystal monopixel

Claudio Ramírez, Eva Otón, Claudio Iemmi, Ignacio Moreno, Noureddine Bennis, José Manuel Otón, and Juan Campos  »View Author Affiliations


Optics Express, Vol. 21, Issue 7, pp. 8116-8124 (2013)
http://dx.doi.org/10.1364/OE.21.008116


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Abstract

In this work a novel point diffraction interferometer based on a variable liquid crystal wave plate (LCWP) has been implemented. The LCWP consists of a 3x3 cm2 monopixel cell with parallel alignment. The monopixel cell was manufactured such that the electrode covers the entire surface except in a centered circular area of 50 μm of diameter. This circle acts as a point perturbation which diffracts the incident wave front giving rise to a spherical reference wave. By applying a voltage to the LCWP we can change the phase of the wave front that passes through the monopixel, except at the center. Phase shifting techniques are used in order to calculate the amplitude and phase distribution of the object wave front. The system allows a digital hologram to be obtained, and by using the Fresnel diffraction integral it is possible to digitally reconstruct the different planes that constitute the three dimensional object.

© 2013 OSA

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(230.3720) Optical devices : Liquid-crystal devices
(090.1995) Holography : Digital holography

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: October 18, 2012
Revised Manuscript: January 5, 2013
Manuscript Accepted: January 6, 2013
Published: March 27, 2013

Citation
Claudio Ramírez, Eva Otón, Claudio Iemmi, Ignacio Moreno, Noureddine Bennis, José Manuel Otón, and Juan Campos, "Point diffraction interferometer with a liquid crystal monopixel," Opt. Express 21, 8116-8124 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-7-8116


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