Holographic
Mostrando 1-12 de 41 artigos, teses e dissertações.
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1. Use of a Portable Microscope Combined with a Smartphone to Determine the Authenticity of Brazilian Banknotes and National Driver’s Licenses
This study proposed using a portable microscope combined with a smartphone and application (PhotoMetrix® application) to evaluate the authenticity of Brazilian banknotes (R$50 and R$100) and national driver’s licenses (NDL) through image acquisition (Samsung S7) and chemometric treatment (principal component analysis (PCA)). Six regions of the banknote we
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Classificando cédulas brasileiras (R$) usando análise de imagem por smartphone
A new method to identify the authenticity of Brazilian banknotes (R$) is proposed using digital image analysis by a smartphone application, Photometrix®, associated with chemometric tools. Authentic banknotes (n = 4) obtained in local bank and falsified (n = 12) by the author himself by means of three printers (laser-Deskjet®, wax-Color Qube® and inkjet-D
Quím. Nova. Publicado em: 2020-04
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3. Dynamic Digital Holography for recording and reconstruction of 3D images using optoelectronic devices
Abstract In this work, we present the optical recording and reconstruction of dynamic 3D digital holograms using optoelectronic devices. Digital Holography technique allows recording and reconstruction of three-dimensional images of real objects, since a hologram presents both the intensity and phase information about the object. The experimental implementat
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-09
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4. La física en la extensión universitaria a través de la holografía como medio de educación social
With the emergence and development of the white-light holograms, new possibilities were created for its utilization as a social education medium due to the characteristic of producing a three-dimensional image which constitutes an optical duplicate of the object. The paper describes the merits and characteristics of the hologram as a means of social educatio
Rev. Bras. Ensino Fís.. Publicado em: 2014-03
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5. Photorefractive digital holographic microscopy: an application in the microdevices surfaces
In this work, we present a Photorefractive Digital Holographic Microscopy (PRDHM) technique based on the writing-reading holographic process in photorefractive Bi12TiO20 (BTO) crystal using the numerical reconstruction of the phase and amplitude image performed by a Digital Holographic Microscopy (DHM) method. We demonstrate that a holographic reconstructed
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-12
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6. Microscopia holográfica fotorrefrativa aplicada à análise de sistemas microestruturados / Photorefractive holographic microscopy applied to analysis of microstructured systems
A análise microscópica em tempo real de sistemas microestruturados é de grande importância em várias áreas da ciência e tecnologia. A microscopia holográfica compreende um grupo de poderosos métodos ópticos para análise de superfícies de forma precisa e não destrutiva. Este tipo de microscopia baseia-se na interferometria holográfica para obter
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2011
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7. DinÃmica de solitons em superfluidos hologrÃficos. / Dynamics of solitons in holographic superfluids
Neste trabalho, estudamos numericamente a formaÃÃo e a dinÃmica de defeitos topolÃgicos do tipo parede de domÃnio em superfluidos em um modelo (3+1)-dimensional do tipo Maxwell-Higgs abeliano, no contexto da correspondÃncia AdS/CFT. Obtemos os propagadores bulk-fronteira, assim como as funÃÃes de correlaÃÃo na fronteira, para um campo escalar nos c
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/07/2010
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8. Haciendo hologramas en la escuela y en la casa
The scientific community that deals with the problems related with the teaching-learning process of Physics has devoted many efforts in its perfectioning in the last years motivated, in the first instance, by renewal demands that the rapidly scientific-technological development currently requests in the teaching of science. In the last few years a rapid deve
Revista Brasileira de Ensino de Física. Publicado em: 2010-09
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9. Modelagem numérica de alto nível de filtros do tipo Fabry-Pérot e de redes de difração holográficas para o instrumento BTFI / High level numerical modeling of optical filters of the type Fabry-Perot and volume-phase holographic gratings for the instrument BTFI.
O trabalho apresentado nesta dissertação foi motivado essencialmente pelo projeto de construção de um novo instrumento a ser instalado no telescópio SOAR, no Chile. Este instrumento, chamado de \textit{Brazilian Tunable Filter Imager} - BTFI, conta com várias novidades dentro da área de instrumentação astronômica. Uma delas envolve a utilização d
Publicado em: 2010
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10. A realidade estranha : um poética visual na sociedade da imagem e sua cultura dos imediatos / The strange reality : a poetic visual of the immediate
This thesis consists of theoretical research and visual practice with the aim of: 1) discuss the process of simulacrum on the field of representation taken by the construct of reality in contemporary society, and 2) production in the visual arts by seeking to create personal poetic in a hybrid regime. To establish a visual show was held a series of photograp
Publicado em: 2010
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11. Pode a não-comutatividade do espaço indicar a dependência funcional da entropia com a área
Calculation of the entropy of black holes is an open subject. Such problem is very interesting due to its relationship with basic problems like; the construction of a quantum theory of the gravity, statistical approach of the calculation of black holes entropy and the validity (or non validity) of the holographic principle. In this work we are looking for a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/10/2009
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12. Holografía: ciencia, arte y tecnología
This article provides a historical review of the origins of holography, placing particular emphasis on the contributions made by Gabor, Denisyuk and Leith to the development of holographic techniques. First of all the physical basis of holography is discussed: interference and difraction, together with the processes involved in recording and reconstructing h
Revista Brasileira de Ensino de Física. Publicado em: 2009-04