HoloEasy, a web application for computer generated holograms

If the appropriate phase and/or amplitude profile is placed on a Diffractive Optical Element (DOE) it can practically generate an image of an object (hologram) by diffraction of the light. The problem of generating computer holograms consists of calculating numerically the profile of phase and/or am...

Full description

Autores:
Tipo de recurso:
Fecha de publicación:
2018
Institución:
Universidad Tecnológica de Bolívar
Repositorio:
Repositorio Institucional UTB
Idioma:
eng
OAI Identifier:
oai:repositorio.utb.edu.co:20.500.12585/8909
Acceso en línea:
https://hdl.handle.net/20.500.12585/8909
Palabra clave:
Computer generated hologram
Diffuser
IFTA
Speckles
Web application
Data visualization
Diffraction
Diffractive optical elements
Diffusers (optical)
Digital storage
Electron holography
Fourier transforms
Holograms
Image communication systems
Image processing
Iterative methods
Lithography
Optical communication
Optical data processing
Optical image storage
Speckle
Amplitude distributions
Computer generated holograms
Fourier transformations
Fraunhofer diffraction
IFTA
Optical applications
Stabilization parameters
Web application
Computer generated holography
Rights
restrictedAccess
License
http://creativecommons.org/licenses/by-nc-nd/4.0/
Description
Summary:If the appropriate phase and/or amplitude profile is placed on a Diffractive Optical Element (DOE) it can practically generate an image of an object (hologram) by diffraction of the light. The problem of generating computer holograms consists of calculating numerically the profile of phase and/or amplitude with which the DOE should be built. Computer Generated Holograms (CGH) can be used to construct general-purpose optical elements in the sense that they serve to transform a spatial distribution of light into any other. In this way, they are used in optical communication systems, laser machining, laser welding, optical readers, human vision, data storage and visualization, image processing, among others. Unlike the optical techniques for generating holograms, in the CGH both the desired image and the phase and/or amplitude distribution are calculated numerically. In this work, a web environment application has been developed to calculate the phase changes that a coherent beam of light must undergo when incident on a DOE, so that it is transformed by Fraunhofer diffraction, in the hologram of an object. We use an algorithm with iterative Fourier transformations (IFTA) that uses regulation and stabilization parameters can be chosen by the user. In addition, the user has the freedom to choose holograms for optical applications (free of speckles) generating initial diffusers of a limited band and without phase singularities. © Springer Nature Switzerland AG 2018.