Diffractive Optics
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Double diffraction white light imaging without intermediary elements / Imagem por dupla difração com luz branca sem elementos intermediarios
We present the analysis of the formation of images by diffractive elements using white light by performing ray-tracing through main directions. The first system we describe is composed of two diffraction gratings and a slit, the second by two bi-dimensional spiral elements and a hole aperture, generating ortoscopic (natural relief) images. From this we had f
Publicado em: 2007
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2. Fabricação de elementos ópticos difrativos de modulação completa. / Complex modulation diffractive optical elements fabrication.
Neste projeto foram desenvolvidos elementos ópticos difrativos fabricados em vidro óptico com modulação de fase, elementos fabricados em silício e em Diamond Like Carbon (carbono tipo diamante) com modulação completa de fase e amplitude. O vidro óptico começa a transmitir em 277 nm (ultravioleta) e vai até o infravermelho próximo (2200 nm) da mesm
Publicado em: 2007
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3. OPTICAL SYNTHESIS OF DUAL REFLECTORS / SÍNTESE ÓTICA DE SISTEMAS DE DUPLOS REFLETORES
The aperture blockage by feed, stalls, and subreflector generally causes degradation of gain and raising of crosspolarisation and sidelobe levels. Consequently, to attend recent recommendations for sidelobe envelope, the design of earth station antennas has employed offset-fed configurations to eliminate blocking effects. Several dual offset designs have bee
Publicado em: 1990
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4. Diffractive optics-based heterodyne-detected four-wave mixing signals of protein motion: From “protein quakes” to ligand escape for myoglobin
Ligand transport through myoglobin (Mb) has been observed by using optically heterodyne-detected transient grating spectroscopy. Experimental implementation using diffractive optics has provided unprecedented sensitivity for the study of protein motions by enabling the passive phase locking of the four beams that constitute the experiment, and an unambi
The National Academy of Sciences.