Double-sideband filter for digital holography

Nowadays, digital holographic systems are based on two main optical schemes: off-axis (OA) and inline (IL) holographic systems. In OA set-ups, the reference and the object beams present a relative angle at the registration plane. Thus, a real image of the object can be obtained without the influence...

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Detalles Bibliográficos
Autor principal: Iemmi, Claudio César
Publicado: 2017
Materias:
diffractive object reconstruction
Digital Holography
particle tracking
sideband filter
Bandpass filters
CCD cameras
Holography
Image processing
Image reconstruction
Optical instruments
Digital holographic systems
Digital holography
Object reconstruction
Particle tracking
Phase-shifting technique
Recognition methods
Reconstruction process
Holograms
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0277786X_v10110_n_p_Ramirez
http://hdl.handle.net/20.500.12110/paper_0277786X_v10110_n_p_Ramirez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_0277786X_v10110_n_p_Ramirez
record_format dspace
spelling paper:paper_0277786X_v10110_n_p_Ramirez2023-06-08T15:26:08Z Double-sideband filter for digital holography Iemmi, Claudio César diffractive object reconstruction Digital Holography particle tracking sideband filter Bandpass filters CCD cameras Holography Image processing Image reconstruction Optical instruments Digital holographic systems Digital holography Object reconstruction Particle tracking Phase-shifting technique Recognition methods Reconstruction process sideband filter Holograms Nowadays, digital holographic systems are based on two main optical schemes: off-axis (OA) and inline (IL) holographic systems. In OA set-ups, the reference and the object beams present a relative angle at the registration plane. Thus, a real image of the object can be obtained without the influence of conjugated images by performing a spatial filtering at the reconstructed plane. IL configurations are less sensitive to vibrations and air flows than OA configurations, but the undesired influence of conjugated images in the final hologram is not avoided. To overcome this limitation, a number of IL based methods have been proposed. One interesting approach is the phase-shifting technique, which leads to efficient holograms for IL applications. However, due to the time-sequential nature of this technique, it is somewhat inappropriate for dynamic processes. We present a new method, for IL digital holography, based on a doublesideband (DSB) filter. This method not only removes the conjugate images in the reconstruction process but also reduces the distortions that usually appear when using single-sideband filters. Moreover, it is only time-limited by the acquisition time of the CCD camera. The appropriateness of the technique to be applied in dynamic processes was tested for the tracking of micro-particles. To this aim, particle holographic images were obtained by using the DSB method and afterwards processed with digital picture recognition methods, this allowing us to accurately track the spatial position of the particles. By using this approach, the instantaneous trajectory and velocity described by glass microspheres in movement were experimentally determined. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only. Fil:Iemmi, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0277786X_v10110_n_p_Ramirez http://hdl.handle.net/20.500.12110/paper_0277786X_v10110_n_p_Ramirez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic diffractive object reconstruction
Digital Holography
particle tracking
sideband filter
Bandpass filters
CCD cameras
Holography
Image processing
Image reconstruction
Optical instruments
Digital holographic systems
Digital holography
Object reconstruction
Particle tracking
Phase-shifting technique
Recognition methods
Reconstruction process
sideband filter
Holograms
spellingShingle diffractive object reconstruction
Digital Holography
particle tracking
sideband filter
Bandpass filters
CCD cameras
Holography
Image processing
Image reconstruction
Optical instruments
Digital holographic systems
Digital holography
Object reconstruction
Particle tracking
Phase-shifting technique
Recognition methods
Reconstruction process
sideband filter
Holograms
Iemmi, Claudio César
Double-sideband filter for digital holography
topic_facet diffractive object reconstruction
Digital Holography
particle tracking
sideband filter
Bandpass filters
CCD cameras
Holography
Image processing
Image reconstruction
Optical instruments
Digital holographic systems
Digital holography
Object reconstruction
Particle tracking
Phase-shifting technique
Recognition methods
Reconstruction process
sideband filter
Holograms
description Nowadays, digital holographic systems are based on two main optical schemes: off-axis (OA) and inline (IL) holographic systems. In OA set-ups, the reference and the object beams present a relative angle at the registration plane. Thus, a real image of the object can be obtained without the influence of conjugated images by performing a spatial filtering at the reconstructed plane. IL configurations are less sensitive to vibrations and air flows than OA configurations, but the undesired influence of conjugated images in the final hologram is not avoided. To overcome this limitation, a number of IL based methods have been proposed. One interesting approach is the phase-shifting technique, which leads to efficient holograms for IL applications. However, due to the time-sequential nature of this technique, it is somewhat inappropriate for dynamic processes. We present a new method, for IL digital holography, based on a doublesideband (DSB) filter. This method not only removes the conjugate images in the reconstruction process but also reduces the distortions that usually appear when using single-sideband filters. Moreover, it is only time-limited by the acquisition time of the CCD camera. The appropriateness of the technique to be applied in dynamic processes was tested for the tracking of micro-particles. To this aim, particle holographic images were obtained by using the DSB method and afterwards processed with digital picture recognition methods, this allowing us to accurately track the spatial position of the particles. By using this approach, the instantaneous trajectory and velocity described by glass microspheres in movement were experimentally determined. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
author Iemmi, Claudio César
author_facet Iemmi, Claudio César
author_sort Iemmi, Claudio César
title Double-sideband filter for digital holography
title_short Double-sideband filter for digital holography
title_full Double-sideband filter for digital holography
title_fullStr Double-sideband filter for digital holography
title_full_unstemmed Double-sideband filter for digital holography
title_sort double-sideband filter for digital holography
publishDate 2017
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0277786X_v10110_n_p_Ramirez
http://hdl.handle.net/20.500.12110/paper_0277786X_v10110_n_p_Ramirez
work_keys_str_mv AT iemmiclaudiocesar doublesidebandfilterfordigitalholography
_version_ 1768541892598824960

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