Patent application number | Description | Published |
20080205837 | Optical waveguide sensor and method of manufacture - An optical waveguide environmental sensor is provided that is capable of detecting a target gas or liquid in the ambient environment in an advantageously short period of time. The waveguide is preferably in the form of an optical fiber having a cladding that contains a photonic band gap structure which in turn envelopes a light conducting, hollow core portion. The cladding further includes at least one elongated side opening that preferably extends the entire length of the fiber and exposes said hollow core portion to the ambient environment, which provides broad and nearly immediate access of the core portion to gases and liquids in the ambient environment, thereby minimizing sensor response time. The ambient gases or liquids filling the hollow core portion and elongated opening function as a ridge and slab, respectively, of an optical ridge waveguide that effectively supports at least one bound optical mode. | 08-28-2008 |
20100053571 | Wavelength Conversion Devices Having Multi-Component Output Faces and Systems Incorporating The Same - The present invention relates generally to wavelength conversion devices and laser projection systems incorporating the same. According to one embodiment of the present invention, wavelength conversion devices are provided without limitation of their field of use to laser projection systems. For example, the wavelength conversion device may comprise an axial waveguide portion and a pair of lateral planar waveguide portions confined between a pair of relatively low index cladding layers. The effective index of refraction in the axial waveguide portion of the waveguide region and the effective index of refraction in the lateral planar waveguide portions of the waveguide region are established such that the relatively low intensity laterally distributed parasitic light is characterized by a scattering angle θ that is at least as large as the beam divergence angle of the relatively high intensity light propagating in the axial waveguide portion. | 03-04-2010 |
20110249695 | Optically Pumped Laser - Concepts of the present disclosure may be employed to optimize optical pumping and ensure high modal gain in the active region of an optically pumped laser source by establishing an optical coupling gap such that the pump waveguide mode field overlaps the active gain region associated with the signal waveguide. The optical coupling gap is tailored to be sufficiently large to ensure that a significant active gain region length is required for absorption and sufficiently small to ensure that the pump waveguide mode field P overlaps the active gain region. In accordance with one embodiment of the present disclosure, the pump waveguide core is displaced from the signal waveguide core by an optical coupling gap g in a lateral direction that is approximately perpendicular to the optical pumping axis. A decayed intensity portion of the pump waveguide mode field extends into the active gain region to optically pump the active gain region and form an optical signal propagating along the longitudinal optical signal axis of the signal waveguide core. | 10-13-2011 |
20120218640 | GLASS HAVING ANTIGLARE SURFACE WITH LOW DISPLAY SPARKLE - A glass article having a low level of grainy appearance that can appear to have a shift in the pattern of the grains with changing viewing angle of a display, or “sparkle.” The glass article—which, in some embodiments, is a transparent glass sheet—has small-angle-scattering properties and/or distinctness-of-reflected-image (DOI), leading to improved viewability in display applications, especially under high ambient lighting conditions. In some embodiments, the antiglare surface of the glass sheet is an etched surface, with no foreign coating present on the antiglare surface. | 08-30-2012 |
20120219301 | LOW-LOSS, LOW-LATENCY, HOLLOW CORE FIBER COMMUNICATION SYSTEM - An optical fiber communication system includes hollow core fiber coupled between a transmitter device and a receiver device. Both hollow core fiber and solid core fiber may be optically coupled between the transmitter and receiver devices, with the hollow core fiber preceding the solid core fiber. A Raman pump laser may be coupled to the solid core fiber to provide distributed Raman amplification in the solid core fiber. A plurality of series connected spans of hollow and solid core fiber may be employed. First and second transmission lines each having a hollow core fiber may be provided in a single cable. | 08-30-2012 |
20120221264 | APPARATUS AND METHOD FOR DETERMINING SPARKLE - An apparatus and method for determining and quantifying “sparkle”—the random noise that is generated when a pixelated image is viewed through a roughened surface of a transparent sample. The apparatus includes a pixelated source and an imaging system located in an optical path originating from the pixelated source, wherein a transparent sample may be placed in the optical path between the pixelated source and the optical system. The degree of sparkle is determined by obtaining an integrated image for the pixelated image; and calculating a standard deviation of the integrated pixel power. An objective level of sparkle can be defined by correlating the amount of sparkle provided by the apparatus with visual impressions. | 08-30-2012 |
20120300304 | TRANSPARENT GLASS SUBSTRATE HAVING ANTIGLARE SURFACE - A transparent glass substrate having an antiglare surface that minimizes sparkle. The antiglare surface has a roughened portion that surface that has a RMS amplitude of at least amplitude of at least about 80 nm. The antiglare surface may also include a portion that is unroughened, or flat. The fraction of the antiglare surface that is roughened is at least about 0.9, and the fraction of the surface that is unroughened is less than about 0.10. The antiglare surface has a pixel power deviation of less than about 7%. | 11-29-2012 |
20120300307 | ENGINEERED ANTIGLARE SURFACE TO REDUCE DISPLAY SPARKLE - A transparent substrate having an antiglare surface with reduced display sparkle. The transparent substrate has a roughened antiglare surface and a diffraction element below the antiglare surface. The diffraction element reduces sparkle by filling gaps between sub-pixels in a pixelated display with orders of diffraction. A display system comprising the transparent substrate and a pixelated display is also provided. | 11-29-2012 |
20130044987 | LOW BEND LOSS OPTICAL FIBER - An optical fiber having both low macrobend loss and low microbend loss. The fiber has a first inner cladding region having an outer radius r | 02-21-2013 |
20130136406 | LOW BEND LOSS OPTICAL FIBER - An optical fiber comprising: (I) a germania doped central core region having outer radius r | 05-30-2013 |
20140291656 | FLEXIBLE HERMETIC THIN FILM WITH LIGHT EXTRACTION LAYER - A protected organic light emitting diode includes an organic light emitting diode structure formed on a substrate, a hermetic barrier layer formed over at least part of the organic light emitting diode structure, and a light extraction layer. The barrier layer may include a glass material such as a tin fluorophosphate glass, a tungsten-doped tin fluorophosphate glass, a chalcogenide glass, a tellurite glass, a borate glass or a phosphate glass. The light extraction layer, which may be formed over the barrier layer, includes a high refractive index matrix material and at least one of scattering particles dispersed throughout the matrix material and a roughened surface. | 10-02-2014 |