Diffractive Optical Element
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Glass Difractive Optical Elements (DOEs) with complex modulation DLC thin film coated
We developed a complex (amplitude and phase) modulation Diffractive Optical Element (DOE) with four phase levels, which is based in a glass substrate coated with DLC (Diamond Like Carbon) thin film as the amplitude modulator. The DLC film was deposited by magnetron reactive sputtering with a graphite target and methane gas in an optical glass surface. The gl
Materials Research. Publicado em: 2008-09
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2. Projeto e fabricação de nao-estruturas por litografa interferometrica / Design and fabrication of nano-structures by interforometric lithography
In this work the interferometric lithography technique was developed for recording periodic relief nano-structures, one and bi-dimensional, on silicon and glass substrates. In particular, the work is focused in two directions: the study of the profile of the structures recorded in photorresist, through the superimposition of interference light patterns, and
Publicado em: 2008
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3. "Hologramas gerados por computador utilizados como sensores ópticos" / "Computer-generated holograms used as an optical sensor"
Dois tipos diferentes de hologramas (Fresnel e Fourier) foram gerados por computador. O holograma de Fresnel foi escolhido para fazer parte de um arranjo experimental que teve como objetivo estimar a rugosidade de amostras metálicas. Para isso, um novo método de aplicação de um correlator óptico foi desenvolvido. Hologramas de Fourier geralmente fazem p
Publicado em: 2005
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4. Local and average gloss from flat-faced sodium chloride tablets
The purpose of this study was to detect local gloss and surface structure changes of sodium chloride tablets. The changes in surface structure were reflected by gloss variation, which was measured using a diffractive optical element-based gloss-meter (DOG). By scanning a surface area, we constructed a 2-dimensional gloss map that characterized the tablet’s
Springer-Verlag.