Zieba
Jerry Zieba, Santa Rosa, CA US
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20080226844 | Space-Variant Liquid Crystal Waveplate - The invention provides a space-variant liquid-crystal (LC) photo-aligned waveplate having a vortex optic axis pattern, and an apparatus and method for fabricating thereof. The method in it preferred embodiment includes exposing a substrate coated with a photo-alignable material such as LPP to linearly polarized UV radiation through a wedge-shaped aperture, while rotating two of the aperture, the substrate and the polarization of the UV light, so that an exposure area performs a full rotation about a center point on the substrate, at angular velocities selected so as to form a vortex alignment pattern of a pre-defined order. An LC material is then deposited on the substrate in direct contact with the photo-alignable material so that the LC director is aligned according to the photo-induced vortex alignment pattern. The method enables to fabricate vortex waveplate of any pre-defined vortex order. | 09-18-2008 |
20140131578 | PORTABLE SPECTROMETER - A portable spectrometer device includes an illumination source for directing at a sample, and a tapered light pipe (TLP) for capturing light interacting with the sample at a first focal ratio and for delivering the light at a second focal ratio lower than the first focal ratio. A linearly variable filter (LVF) separates the captured light into a spectrum of constituent wavelength signals; and a detector array, including a plurality of pixels, each of the plurality of pixels disposed to receive at least a portion of a plurality of the constituent wavelength signals provides a power reading for each constituent wavelength. Preferably, the TLP is lensed at one end, and recessed in a protective boot with stepped inner walls. The gap between the TLP and LVF is minimized to further enhance resolution and robustness. | 05-15-2014 |
Jerry M. Zieba, Santa Rosa, CA US
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20090122402 | Achromatic Converter Of A Spatial Distribution Of Polarization Of Light - An achromatic converter of spatial distribution of polarization from a first to a second pre-defined distribution of polarization is described. The converter comprises a plurality of photo-aligned quarter-wave or half-wave liquid crystal polymer layers, wherein the patterns of alignment of the layers are correlated with each other so as to make polarization conversion achromatic. Achromatic polarization vortices can be formed. The polarization conversion efficiencies over 97% have been demonstrated over most of the visible spectrum of light. The polarization converters can be used in imaging, photolithography, optical tweezers, micromachining, and other applications. | 05-14-2009 |
Roman Zieba, Heddesheim DE
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20120217681 | PROCESS FOR PRODUCING NANOFIBRES - The present invention relates to a process for producing metal oxide nanofibers using a sol-gel precursor. The nanofibers produced by the process according to the invention are notable for an increased metal oxide content compared to the prior art. | 08-30-2012 |
Roman Zieba, Munchen DE
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20130220178 | Re-Dispersible Metal Oxide Nanoparticles and Method of Making Same - The current invention relates to a method of making metal oxide nanoparticles comprising the reaction of—at least one metal oxide precursor (P) containing at least one metal (M) with—at least one monofunctional alcohol (A) wherein the hydroxy group is bound to a secondary, tertiary or alpha-unsaturated carbon atom—in the presence of at least one aliphatic compound (F) according to the formula Y | 08-29-2013 |
Stanislaw Zieba, Krakow PL
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20100171485 | METHOD AND APPARATUS FOR MONITORING STORM ACTIVITY ON THE EARTH'S SURFACE IN REAL TIME - The method comprises recording ELF (Extremely Low Frequency) electromagnetic field signals created by electrical spark discharges and induced in the Earth-ionosphere resonator that are subjected to spectral analysis based on ELF field resonance propagation models in the Earth-ionosphere cavity thanks to whose features, distance and intensity dependencies of electrical spark discharges are separated and then compared with database model parameters. Model data selected as the best approximation enables to reconstruction of the location and intensity of electrical spark discharges. The apparatus, which allows reconstruction of the location and intensity of electrical spark discharges, is equipped with two inductive, magnetic antennas (A | 07-08-2010 |
Sylwia Zieba, New York, NY US
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20150111764 | POLYMERIZED MICROARRAYS - Micropatterns of glycan-bearing brush polymers generated by the initiation of oligomerization of acrylate and methacrylate monomers from thiol-terminated surfaces. Chain lengths are controlled in situ by varying exposure time, and these multivalent glycan scaffolds detect glycan binding proteins at sub-micromolar concentrations. | 04-23-2015 |