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Showing 1 to 8 of 8 for “"Interference filter"”.
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Sol-gel synthesis of one-dimensional photonic bandgap structures
… method. A dielectric mirror, or broadband interference filter, was fabricated by alternating quarter-wave optical thickness layers of the two films on a silicon substrate for a total of six layer pairs. This device exhibited an omnidirectional photonic bandgap of 450 nm in TE-polarization …
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Moiré interferometry at high temperatures
… 417 nm per fringe. The stable and well-defined interference patterns confirmed the feasibility of the developments, including the high-temperature moiré system and high-temperature specimen grating. The moiré system was demonstrated to be vibration-insensitive. Also, the contrast of interference …
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A near-infrared filter system and study of solar umbral dots at 1.6 µm
… solar magnetic fields (below 1000 Gauss), a new filter system (magnetograph) working in near-IR wavelength has been developed in this work. This system includes an interference prefilter (FWHM - 40 [Angstrom]), a liquid crystal magnetic analyzer, a near-IR bireffingent filter (FWHM - 2.5 …
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Silicon-based tunable optical filters
… of a new class of silicon-based tunable optical filters. For this purpose a Fabry-Perot structure was chosen and implemented as a thin-film interference filter. The filter layers were configured as a self-supporting square membrane with side lengths of a few hundred microns. The approach …
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The Scattering of H-alpha Emission Associated with the Rosette Nebula in the Monoceros Region Studied Using Polarimetry
… Virginia. The SLIC uses a narrow bandpass interference filter coupled with a 58 mm camera lens and cryogenically cooled CCD camera to image diffuse, extended H-alpha emission over a 10° angular extent. A rotating polarizer device was placed in front of the H-alpha filter with images …
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Electrostatic Self-Assembly of Linear and Nonlinear Optical Thin Films
… index profiles required for linear optical interference filters. The inherent ordered nature of ESA films yielded extremely stable noncentrosymmetric thin films for second-order nonlinear optical applications. The ESA technique offers numerous advantages over conventional thin film …
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Reststrahlen band optics for the advancement of far-infrared optical architecture
… doped silicon. The structure is essentially an interference filter with an anti-reflection coating (the germanium film) that is significantly thinner than the typical quarter wavelength thickness used in such filters -- an effect enabled by the plasmonic properties of the highly doped silicon. …
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Développement d'un dispositif intégré de photodétection de grande sensibilité avec discrimination spectrale pour les laboratoires sur puce
… and characterization of integrated optical filters for fluorescence detection. The detection device implements a Buried Quad Junction photodetector (BQJ) and charge sensitive preamplifiers for the simultaneous treatment of its four outputs. The chip was made in 0.8μm High Voltage CMOS …