Abstract: An optical film includes a structured film and a light control film formed on the structured film. The structured film includes a substrate and a plurality of polymeric microstructures formed on a major surface of the substrate. Each microstructure includes an optical facet and a sidewall meeting the optical facet at a ridge of the microstructure. The light control film includes an optically transparent material disposed on and covering the plurality of polymeric microstructures, and a plurality of optically absorptive louvers formed in the optically transparent material opposite the structured film. The louvers extend along a longitudinal direction and are spaced apart along an orthogonal transverse direction. The louvers have an average depth D into the optically transparent material and have an average width W in the transverse direction. D/W can be greater than 2. The optical film is integrally formed.

Abstract: An optical film has a major surface including a plurality of microstructures. Each microstructure includes an optical facet and a sidewall meeting the optical facet at a ridge of the microstructure. The optical facet and the sidewall define an oblique angle therebetween. For each microstructure in at least a majority of the microstructures, an optically absorptive layer is disposed on the sidewall. The optical film can include a polymeric layer having a microstructured surface at least partially coated with an inorganic optically transparent layer. The optically absorptive layer can an average thickness t where 100 nm<t<1 micrometer. A first layer can be disposed between the sidewall and the optically absorptive layer where the first layer has a lower extinction coefficient than the optically absorptive layer.

Abstract: A light control film comprises a light input surface and a light output surface opposite the light input surface. Alternating transmissive regions and absorptive regions are disposed between the light input surface and the light output surface. The absorptive regions have an aspect ratio of at least 30 and the alternating transmissive region and absorptive regions have a relative transmission at a viewing angle of 0 degrees of at least 75%.

Abstract: An optical system includes a light source, an optical film curved about a first axis, and a light control film curved about the first axis and disposed between the light source and the optical film. The optical film includes a microstructured first major surface and an opposing second major surface. The microstructured first major surface defines a linear Fresnel lens including a plurality of Fresnel elements extending longitudinally along the first axis. The first major surface of the optical film faces of the optically transmissive regions, a centerline between adjacent optically absorptive regions is substantially normal to a major surface of the light control film.

Abstract: A light control film is described comprising alternating transmissive regions and absorptive regions disposed between a light input surface and a light output surface. The absorptive regions have an aspect ratio of at least 30. In some embodiments, the alternating transmissive regions and absorptive regions have a transmission as measured with a spectrophotometer at a viewing angle of 0 degrees of at least 35, 40, 45, or 50% for a wavelength of the range 320-400 nm (UV) and/or at least 65, 70, 75, or 80% for a wavelength of the range 700-1400 nm (NIR). In another embodiment, the absorptive regions block light at the light input surface and light output surface and the maximum surface area that is blocked is less than 20% of the total alternating transmissive regions and absorptive regions. Also described are various optical communication systems comprising the light control films described herein and methods.

Abstract: A circuit having a stationary portion and a rotating portion suitable for an arcuate scan assembly in a storage device is disclosed. The circuit includes a stationary encoder outputting an encoded write signal; a power supply; and a rotary transformer comprising a stator and a rotor. The stator has at least one stator winding and the rotor has at least one rotor winding, with the stationary encoder coupled to the stator winding. A decoder is provided and includes an input coupled to said at least one rotor winding and rotating with the rotor. The input receives an encoded write signal, and the decoder further has an output. Also provided is an amplifier coupled to receive the decoder output, and further being coupled to the power supply via the rotating transformer. The amplifier rotates with the decoder and the rotor. Also, at least one read/write head is included and is coupled to receive an amplifier output from the amplifier and return a read data signal to the amplifier.

Abstract: A method and a system for recording and reading magnetic information on a linear tape are disclosed. A write head is disclosed that is wider than the read head. Tracks of discrete, elongate bits of information, which are oriented perpendicular to the long axis of the tape, are recorded by the write head. The read head avoids crosstalk without employing azimuth recording techniques by re-positioning the read head over the center of the narrowed track prior to beginning the reading process. The combination of the narrow read head and re-positioning of the read head enables track trimming, which provides high lateral track density. The drive disclosed is capable of reading and recording on existing QIC tapes, as well as higher density cartridges.

Abstract: A transformer comprising a rotor and a stator. The rotor is positioned for rotation about a rotational axis and having a plurality of windings. At least one of said plurality of windings is positioned at a first radial distance from the rotational axis, and at least another of said plurality of windings is positioned at a second radial distance from the rotational axis. The stator has at least two windings, a first of said at least two stator windings being provided at said first radial distance, and at least a second of said windings being provided at said second radial distance from said rotational axis. Alternating ones of said plurality of rotor windings inductively couple to alternating ones of said at least two stator windings as said rotor rotates about said axis.

Abstract: As an alernative to incarceration or supervised parole/probation, and following the burgeoning home detention philsophy, the penalty device would provide a humane, relatively inexpensive, court directed, rehabilitative/monitoring measure for non-violent criminal offenders. The device would consist of a rigid sleeve of heavy gauge plastic or metal which is locked in place around a criminal offender's forearm by a locking mechanism. The penalty device would be a court ordered stipulation or unsupervised parole or probation. The device would not only constitute appropriate requital for many offenses, but would additionally serve to identify certain offenders to law enforcement personnel and the public in general.