Point diffraction interferometer with a liquid crystal monopixel

Claudio Ramírez; Eva Otón; Claudio Iemmi; Ignacio Moreno; Noureddine Bennis; José Manuel Otón; Juan Campos

doi:https://doi.org/10.1364/OE.21.008116

Point diffraction interferometer with a liquid crystal monopixel

Claudio Ramírez, Eva Otón, Claudio Iemmi, Ignacio Moreno, Noureddine Bennis, José Manuel Otón, Juan Campos

Department of Physics

Research output: Contribution to journal › Article › Research › peer-review

14 Citations (Scopus)

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 Optical Society of America.

Original language	English
Pages (from-to)	8116-8125
Journal	Optics Express
Volume	21
DOIs	https://doi.org/10.1364/OE.21.008116
Publication status	Published - 8 Apr 2013

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title = "Point diffraction interferometer with a liquid crystal monopixel",

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. {\textcopyright} 2013 Optical Society of America.",

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T1 - Point diffraction interferometer with a liquid crystal monopixel

AU - Ramírez, Claudio

AU - Otón, Eva

AU - Iemmi, Claudio

AU - Moreno, Ignacio

AU - Bennis, Noureddine

AU - Otón, José Manuel

AU - Campos, Juan

PY - 2013/4/8

Y1 - 2013/4/8

N2 - 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 Optical Society of America.

AB - 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 Optical Society of America.

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DO - https://doi.org/10.1364/OE.21.008116

M3 - Article

SN - 1094-4087

VL - 21

SP - 8116

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JO - Optics Express

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Point diffraction interferometer with a liquid crystal monopixel

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