Abstract:
A method for determining the presence of an analyte in a fluid is described along with various components of an apparatus specifically designed to carry out the method. The method involves taking a reflectance reading from one surface of an inert porous matrix impregnated with a reagent that will interact with the analyte to produce a light-absorbing reaction product when the fluid being analyzed is applied to another surface and migrates through the matrix to the surface being read. Reflectance measurements are made at two separate wavelengths in order to eliminate interferences, and a timing circuit is triggered by an initial decrease in reflectance by the wetting of the surface whose reflectance is being measured by the fluid which passes through the inert matrix. Repeatability is insured by a normalization technique performed on the light source before each reading, and an alignment method operated on the reagent strip prior to emplacement on the apparatus. The method and apparatus are particularly suitable for the measurement of glucose levels in blood without requiring separation of red blood cells from serum or plasma.
Abstract:
An automation or robotics application to wrap objects that are cuboid-shaped and may have an arbitrary size. The machine includes a first module for advertising, dimensioning, and user interfacing. A second module is provided for wrapping paper handling. A third module provides a platform and object alignment assembly. A fourth module provides a gift wrapping chamber. A fifth module provides a taping and dispensing area. A sixth module provides a waste management area. The wrapping machine is configured to autonomously wrap the object and to deliver the fully wrapped object back to original position of the platform.
Abstract:
Sidelobe suppression methods and systems for use in processing radar video streams generated by rotational radar antenna scanners. The sidelobe suppression methods function in parallel with traditional Sensitivity Control (SC) processing by selectively reducing sensitivity where necessary depending on sidelobe suppression schemes that can be either directional, omni-directional (non-directional), or a combination of these.
Abstract:
One embodiment relates to a cable connector. The cable connector includes a body having a forward end and a rearward end opposite the forward end, a post disposed at least partially within the body, a fastener coupled to the forward end of the body, and a compressible member disposed on an outer surface of the body. The post includes a flange portion extending radially from a forward end of the post. The fastener is axially movable between a forward position and a rearward position, and wherein the fastener comprises an interior surface configured to contact the flange portion of the post when the fastener is in the forward position. The compressible member is configured to force the fastener toward the forward position such that the interior surface of the fastener provides a continuous pressure against the flange of the post when the fastener is in the forward position.
Abstract:
Sidelobe suppression methods and systems for use in processing radar video streams generated by rotational radar antenna scanners. The sidelobe suppression methods function in parallel with traditional Sensitivity Control (SC) processing by selectively reducing sensitivity where necessary depending on sidelobe suppression schemes that can be either directional, omni-directional (non-directional), or a combination of these.
Abstract:
An optically variable device is disclosed having a substrate with an array of pyramidal structures formed upon it or within it. The structures are preferably formed by printing pyramids with an optically variable color-shifting ink using an Intaglio-like printing process. Alternatively the structure can be formed by embossing a layer of ink with positive pyramids so as to yield an array of positive embossed pyramids. Each of the structures form a pyramidal-like having at least three slanted faces and wherein one or more than one color is seen when viewing the pyramids vary as substrate is rotated at least 30 degrees about an axis orthogonal to the substrate. In order to see a color shift the device is rotated around the surface normal of the substrate, while keeping the angle of incidence to the light source the same, and keeping the viewing angle the same. Various forms of pyramids may be used, however pyramids with planar faces are most suitable.
Abstract:
An optically variable device is disclosed having a substrate with an array of pyramidal structures formed upon it or within it. The structures are coated with an optically variable color-shifting coating. Each of the structures form a pyramidal-like having at least three slanted faces and wherein one or more colors seen when viewing the pyramids vary as substrate is rotated at least 30 degrees about an axis orthogonal to the substrate. In order to see a color shift the device is rotated around the surface normal of the substrate, while keeping the angle of incidence to the light source the same, and keeping the viewing angle the same. Various forms of pyramids may be used, however pyramids with planar faces are most suitable.
Abstract:
A security article includes a light transmissive substrate having a first surface and an opposing second surface, with the first surface having an embossed region with an optical diffraction pattern or a holographic image pattern. A color shifting optical coating is formed on the substrate such as on the opposing second surface, with the optical coating providing an observable color shift as the angle of incident light or viewing angle changes. The security article can be used in a variety of applications and products to provide for enhanced security measures such as anticounterfeiting.
Abstract:
A security thread for embedding in or on a sheet such as a document, currency or packaging is disclosed, wherein the thread has a thin film interference structure deposited thereon. The article has plural Fabry-Perot filters and light transmissive windows between the filters, so that another optical structure, such as a reflective layer or color shifting foil, is visible though the windows and provides a visual reference to the image formed by the Fabry-Perot filters. Preferably, the thread is first roll coated with oil using an oil-ablation technique to remove deposited material in situ in the coating process. A magnetic layer may be deposited within, behind or in front of the thin film interference structure.
Abstract:
A security article includes a light transmissive substrate having a first surface and an opposing second surface, with the first surface having an embossed region with an optical diffraction pattern or a holographic image pattern. A color shifting optical coating is formed on the substrate such as on the opposing second surface, with the optical coating providing an observable color shift as the angle of incident light or viewing angle changes. The security article can be used in a variety of applications and products to provide for enhanced security measures such as anticounterfeiting.