A new method for three-dimensional tracking using a liquid crystal on silicon (LCoS)

Imaging of samples by different microscopy techniques has produced a relevant impact in the development of new diagnosis techniques in biology, medicine, and material science. In many biological applications, where the sample changes or moves during the observation, a dynamical focusing of the micro...

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Detalles Bibliográficos
Autores principales: Martínez, Oscar Eduardo, Iemmi, Claudio César, Ledesma, Silvia Adriana
Publicado: 2008
Materias:
Beam intensity
Beam profile
Beam shaping
Filters
Image forming and processing
Light sources
Liquid crystals
Optical systems
Three dimensional
Modulation
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14644258_v10_n10_p_Goldin
http://hdl.handle.net/20.500.12110/paper_14644258_v10_n10_p_Goldin
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_14644258_v10_n10_p_Goldin
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spelling paper:paper_14644258_v10_n10_p_Goldin2023-06-08T16:16:43Z A new method for three-dimensional tracking using a liquid crystal on silicon (LCoS) Martínez, Oscar Eduardo Iemmi, Claudio César Ledesma, Silvia Adriana Beam intensity Beam profile Beam shaping Filters Image forming and processing Light sources Liquid crystals Optical systems Three dimensional Beam intensity Beam profile Beam shaping Filters Image forming and processing Modulation Imaging of samples by different microscopy techniques has produced a relevant impact in the development of new diagnosis techniques in biology, medicine, and material science. In many biological applications, where the sample changes or moves during the observation, a dynamical focusing of the microscope is needed. To this end it is necessary to localize the sample previously to the refocusing process. We introduce here an optical system that can perform three-dimensional (3D) tracking without mechanical displacements. The system is based on the use of a high resolution liquid crystal on silicon (LCoS) device working as a phase mostly wavefront modulator. The additional advantage of this system is performing the motion of the spot at video rate. By using elliptical polarization we have experimentally found a configuration where the phase modulation is 2π and the intensity modulation has a variation less than 25%. For this configuration we show how the spot can be moved through the focus plane by means of linear phases, or displaced out of this plane by using a quadratic phase. © 2008 IOP Publishing Ltd. Fil:Martínez, O.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Iemmi, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ledesma, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14644258_v10_n10_p_Goldin http://hdl.handle.net/20.500.12110/paper_14644258_v10_n10_p_Goldin
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Beam intensity
Beam profile
Beam shaping
Filters
Image forming and processing
Light sources
Liquid crystals
Optical systems
Three dimensional
Beam intensity
Beam profile
Beam shaping
Filters
Image forming and processing
Modulation
spellingShingle Beam intensity
Beam profile
Beam shaping
Filters
Image forming and processing
Light sources
Liquid crystals
Optical systems
Three dimensional
Beam intensity
Beam profile
Beam shaping
Filters
Image forming and processing
Modulation
Martínez, Oscar Eduardo
Iemmi, Claudio César
Ledesma, Silvia Adriana
A new method for three-dimensional tracking using a liquid crystal on silicon (LCoS)
topic_facet Beam intensity
Beam profile
Beam shaping
Filters
Image forming and processing
Light sources
Liquid crystals
Optical systems
Three dimensional
Beam intensity
Beam profile
Beam shaping
Filters
Image forming and processing
Modulation
description Imaging of samples by different microscopy techniques has produced a relevant impact in the development of new diagnosis techniques in biology, medicine, and material science. In many biological applications, where the sample changes or moves during the observation, a dynamical focusing of the microscope is needed. To this end it is necessary to localize the sample previously to the refocusing process. We introduce here an optical system that can perform three-dimensional (3D) tracking without mechanical displacements. The system is based on the use of a high resolution liquid crystal on silicon (LCoS) device working as a phase mostly wavefront modulator. The additional advantage of this system is performing the motion of the spot at video rate. By using elliptical polarization we have experimentally found a configuration where the phase modulation is 2π and the intensity modulation has a variation less than 25%. For this configuration we show how the spot can be moved through the focus plane by means of linear phases, or displaced out of this plane by using a quadratic phase. © 2008 IOP Publishing Ltd.
author Martínez, Oscar Eduardo
Iemmi, Claudio César
Ledesma, Silvia Adriana
author_facet Martínez, Oscar Eduardo
Iemmi, Claudio César
Ledesma, Silvia Adriana
author_sort Martínez, Oscar Eduardo
title A new method for three-dimensional tracking using a liquid crystal on silicon (LCoS)
title_short A new method for three-dimensional tracking using a liquid crystal on silicon (LCoS)
title_full A new method for three-dimensional tracking using a liquid crystal on silicon (LCoS)
title_fullStr A new method for three-dimensional tracking using a liquid crystal on silicon (LCoS)
title_full_unstemmed A new method for three-dimensional tracking using a liquid crystal on silicon (LCoS)
title_sort new method for three-dimensional tracking using a liquid crystal on silicon (lcos)
publishDate 2008
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14644258_v10_n10_p_Goldin
http://hdl.handle.net/20.500.12110/paper_14644258_v10_n10_p_Goldin
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