Patents Examined by Cassandra Spyrou
  • Patent number: 6499886
    Abstract: A method of manufacturing glass parts for connection of glass fibers is provided, which can improve the accuracy of the cross-sectional size of a through hole in the glass part. A mother glass having a similar cross section to a desired cross section of a glass part having a through hole is prepared, and the prepared mother glass is drawn while it is heated.
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: December 31, 2002
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventors: Toshiaki Mizuno, Katsuya Kamisaku, Masahiro Morishita
  • Patent number: 6501888
    Abstract: A fiber optic cable with at least one optical transmission component having a nominal radius, and at least two strength components, at least one of the strength components being generally adjacent to the optical transmission component. At least one of the strength components having a nominal radius that is less than the nominal radius of the optical transmission component. A cable jacket surrounds the optical transmission component and the strength components. The optical transmission component being generally disposed adjacent generally flat surfaces of the cable jacket. The cable can be made by an extrusion tooling apparatus with a tip and a die, the extrusion tooling apparatus being operative to extrude jacketing material about the strength components and the optical transmission component. The tip has an orifice defined within the end of the tip for receiving the strength and optical transmission components therein.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: December 31, 2002
    Assignee: Corning Cable Systems LLC
    Inventors: Michael J. Gimblet, Larry Field
  • Patent number: 6499594
    Abstract: The invention is directed to a housing for a binocular (1) having a hard base body (9) which is encased in a soft outer skin (21). The outer skin (21) is attached with the aid of a latch mechanism.
    Type: Grant
    Filed: November 6, 2000
    Date of Patent: December 31, 2002
    Assignee: Hensoldt AG
    Inventor: Norbert Koch
  • Patent number: 6501571
    Abstract: A master hologram is generated in a first optical medium by use of a plurality m of different reference beams, each beam bearing information suitably recorded in one or more of a plurality n layers of the second optical medium that are distinct from layers in which information in all other beams is suitably recorded. The generated master hologram is then used to optically holographically stamp, or record, multi-layer bit-oriented optical media by writing all n layers of the volume of the blank optical medium with m recording beams produced by simultaneously illuminating the master hologram with all m different reference beams, each illuminating reference beam being at a different reference angle and from a coherent light source which is incoherent with respect to every other illuminating reference beam.
    Type: Grant
    Filed: April 11, 2000
    Date of Patent: December 31, 2002
    Assignee: The Regents of the University of California
    Inventors: Mark Wang, Sadik Esener
  • Patent number: 6501884
    Abstract: Disclosed is a method of launching a light beam from a semiconductor laser into a multimode optical fiber, as well as apparatus for launching the light beam. The light beam is directed at nominally the center of the input face of the multimode fiber such that the (unguided) light beam makes an angle &thgr;b (typically in the range 1-20 degrees) with the direction perpendicular to the input face of the multimode fiber. The angle &thgr;b is selected such that at least one lower order mode of the guided radiation in the multimode fiber is substantially not excited in the fiber, with at least some higher order modes being substantially excited. Several specific embodiments are disclosed.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: December 31, 2002
    Assignee: Lucent Technologies Inc.
    Inventors: Steven Eugene Golowich, William Alfred Reed
  • Patent number: 6499889
    Abstract: A light emitting module and a light receiving module are indirectly received in respective module receiving sections of a shield casing so as to set the modules in position in the shield casing. The shield casing is then mounted in an optical housing to assemble an optical connector. Positioning of the light emitting module and the light receiving module and their leads is easily attained. The operation for assembling the optical connector is facilitated.
    Type: Grant
    Filed: April 5, 2000
    Date of Patent: December 31, 2002
    Assignee: Yazaki Corporation
    Inventors: Tsuguhito Shirakawa, Nobuyuki Akeda, Toshiharu Takahashi
  • Patent number: 6498679
    Abstract: A micro-retarder plate using a single plate with phase retardation. The plate with phase retardation having a pattern that further comprises a plurality of first retardation state areas and second retardation state areas alternating with each other is formed on the micro-retarder plate. The pattern is formed using an infra-red laser to expose the plate with phase retardation, or using a circuit board with a pattern of electrothermal resistor thereon in contact with the plate of phase retardation. The linear polarized lights with direction of polarization being 45 degrees to the stretching direction of the retardation film passing through the first retardation state areas and the second retardation state areas are perpendicular to each other. The micro-retarder is laminated between two protection layers with index matching glue to remove the scattering effect caused by the heat process.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: December 24, 2002
    Assignee: Industrial Technology Research Institute
    Inventors: Kuen Lee, Chao-Hsu Tsai
  • Patent number: 6498681
    Abstract: A temperature-compensated optical grating is fed an optical probe signal of a predetermined wavelength. An optical detector having a plurality of apertures for receiving an optical signal is positioned to detect a probe light signal from the grating and to detect the deflection of the probe light signal from a preferred location. The detector provides an indication of the deflection to a controller which operates a temperature adjustment device, such as a fan or thermoelectric cooler to adjust the temperature of the grating in a direction which reduces the deflection.
    Type: Grant
    Filed: May 3, 2001
    Date of Patent: December 24, 2002
    Assignee: Lucent Technologies Inc.
    Inventor: Stamatios V. Kartalopoulos
  • Patent number: 6498662
    Abstract: A holographic optical element (HOE) device useable for an optical receiver system has a first element having first and second surfaces, with the first surface being positionable to face incident light rays. The incident light rays can comprise laser light having data modulated thereon. An emulsion material is disposed over the second surface of the first element and has a recorded interference pattern that diffracts the incident light rays that pass through the first element. A second element overlies the emulsion material and is structured to pass resulting light rays derived from the incident light rays and diffracted from the recorded interference pattern. A plurality of reflective elements are positioned adjacent to the first and second elements. The reflective elements fold the resulting light rays within the second element, thereby allowing a reduction in separation length between the emulsion material and receiver electronics.
    Type: Grant
    Filed: July 28, 2000
    Date of Patent: December 24, 2002
    Assignee: Terabeam Corporation
    Inventor: John J. Schuster
  • Patent number: 6498799
    Abstract: Fiber ring lasers that combine a fiber Fabry-Perot resonator and a fiber grating coupler to produce a single-mode laser output.
    Type: Grant
    Filed: August 14, 2000
    Date of Patent: December 24, 2002
    Assignee: California Institute of Technology
    Inventors: Yaakov Shevy, Amnon Yariv, Dan Provenzano
  • Patent number: 6496624
    Abstract: The present invention provides an optical waveguide device for optical wiring, and a manufacturing method therefor, which provides the advantages that simple and highly accurate connection is possible, the device is low in cost, and it is easily manipulated. The present invention is provided with connectors which are connected to optical fibers in a nonalignment via guide pins, and a polymeric waveguide comprising a film-shaped optical waveguide; the connectors are joined to both ends or to one end of the polymeric waveguide, and the connectors are formed by two connector parts which are arranged in facing position, and in the surfaces of the connector parts which are in facing position, a polymeric waveguide loading groove for loading the polymeric waveguide, and two guide pin loading grooves for loading guide pins are formed, and the polymeric waveguide is sandwiched between the two connector parts, and the polymeric waveguide is joined with the two connector parts and made unitary.
    Type: Grant
    Filed: April 13, 1999
    Date of Patent: December 17, 2002
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Makoto Hikita, Satoru Tomaru, Koji Enbutsu, Saburo Imamura, Michiyuki Amano, Shun-ichi Tohno
  • Patent number: 6496287
    Abstract: An optical component in the form of an identification element (such as for counterfeit protection or copy protection) includes an optically anisotropic layer comprising regions of different optical axes that is arranged over a reflector. The anisotropic layer may be implemented with a liquid crystal polymer in which the orientation of the liquid crystals is different in different areas. Such an orientation pattern is initially hidden from a viewer, but becomes visible by means of an additional polariser. To improve the visual appearance of the identification element, a white light hologram may be used for the reflector.
    Type: Grant
    Filed: October 4, 2000
    Date of Patent: December 17, 2002
    Assignee: Rolic AG
    Inventors: Hubert Seiberle, Franco Moia, Martin Schadt
  • Patent number: 6494602
    Abstract: An exterior rearview mirror assembly security system for a vehicle includes an exterior mirror assembly with a security light assembly which projects a pattern of light from the exterior mirror assembly on a ground area adjacent a door of the vehicle in order to create a lighted security zone in the area. The security system further includes a control, which is responsive to approach by a person to the vehicle and actuates the security light assembly to generate the pattern of light from the exterior mirror assembly in order to provide the lighted security zone adjacent the side of the vehicle equipped with the exterior rearview mirror assembly.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: December 17, 2002
    Inventors: Todd W. Pastrick, Mark R. Litke, David K. Willmore, Rick Mousseau
  • Patent number: 6496634
    Abstract: Hollow core or “holey” optical fibers are filled with a gas or liquid which exhibits high Raman gain. Such gases as hydrogen and hydrogen isotopes are preferred embodiment. When these fibers are pumped with a pump laser, signals at an appropriate frequency carried by the fiber may be amplified, attenuated, changed to a different frequency, or mixed with other signals.
    Type: Grant
    Filed: July 17, 2001
    Date of Patent: December 17, 2002
    Inventor: Marc David Levenson
  • Patent number: 6496640
    Abstract: A splice closure contains multiple splice trays that can be individually pivoted and accessed so that the splice closure is capable of optimally carrying and providing access to numerous optical fibers and optical fiber splices. The splice closure has a housing defining an internal cavity and at least one opening to the internal cavity. An end cap is capable of occluding the opening of the housing to provide an enclosed configuration. A support frame has opposite front and rear ends, the front end of the support frame is connected to the end cap, and the support frame is capable of being positioned within the internal cavity of the housing during the enclosed configuration. The support frame extends in a longitudinal direction between the front and rear ends, and defines a frame axis that extends in the longitudinal direction.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: December 17, 2002
    Assignee: Corning Cable Systems LLC
    Inventors: John D. Harvey, Kelly J. Smith, James H. Wicker
  • Patent number: 6496306
    Abstract: A projection exposure lens system has an object side catadioptric system, and intermediate image and a refractive lens system. The refractive lens system from its intermediate image side and in the direction of its image plane has a first lens group of positive refractive power, a second lens group of negative refractive power, a third lens group of positive refractive power, a fourth lens group of negative refractive power, and a fifth lens group of positive refractive power.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: December 17, 2002
    Assignee: Carl-Zeiss Stiftung
    Inventors: David R. Shafer, Helmut Beierl, Gerhard F├╝rter, Karl-Heinz Schuster, Wilhelm Ulrich
  • Patent number: 6493492
    Abstract: A manufacture includes a first optical fiber and a plurality of second optical fibers. The second optical fibers have cross sections with aspect ratios of two or more. Distal sections of the fibers form a bonded structure. In the bonded structure, each distal section is bonded along a length of another one of the distal sections and along a section of the first optical fiber.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: December 10, 2002
    Assignee: Lucent Technologies Inc.
    Inventor: George L Fischer
  • Patent number: 6491445
    Abstract: The invention is directed to a crimp plug having a front portion, a center portion, and a securing portion. A conductor receiving cavity extends from the front e into the center portion. A stop shoulder within the center portion provides transition from the conductor receiving cavity to a plurality of conductor receiving passageway extending to a rear end. Each conductor receiving passageway serves to properly position the conductors while the stop shoulder serves to control the insertion length. A securing portion extends from the center portion and provides for securing of the cable.
    Type: Grant
    Filed: December 8, 1999
    Date of Patent: December 10, 2002
    Assignee: The Whitaker Corporation
    Inventor: Frederic Henry Abendschein
  • Patent number: 6493141
    Abstract: The present invention provides a multi-functional separator which may be used as a demultiplexer or as a multiplexer in wavelength division multiplexed optical communication systems. The preferred embodiment of the multi-functional separator includes a first polarization beam splitter, a non-reciprocal rotator; a reciprocal rotator, a second polarization beam splitter, and a non-linear interferometer. Each of the polarizing input and polarizing output ports includes an optical fiber, a collimator, a birefringent walk-off plate and a non-reciprocal optical rotator. The collimator includes a glass plate and a lens/spacer element between the glass plate and the birefringent walk-off plate. The multi-functional separator is easily aligned by adjusting the positions of each of the polarizing input and output port. Further embodiments of the present invention provide additional optical isolation, optical circulation, optical comb filtering and/or two-stage channel separation capabilities.
    Type: Grant
    Filed: December 18, 2000
    Date of Patent: December 10, 2002
    Assignee: Avanex Corporation
    Inventors: Simon Cao, William Brian Kinard, David Michael Rowe
  • Patent number: 6491443
    Abstract: A sleeve (21) includes a core (22) of transparent synthetic resin and a cladding (23), also of transparent synthetic resin, having a smaller refractive index than the core. The core includes an optical waveguide (24) extending in an optical axial direction to taper in a conical shape and a lens (27) formed at the large diameter end of the waveguide. The lens receives light and converges it. There is a circular flange-like guide integral to the outer wall in the vicinity of the lens. The cladding (23) is formed concentrically with the core in intimate contact with the outer wall of the core. The configuration improves the transmission efficiency of light and contributes to cost reduction of the sleeve.
    Type: Grant
    Filed: March 28, 2000
    Date of Patent: December 10, 2002
    Assignee: Yazaki Corporation
    Inventors: Naoshi Serizawa, Junichi Matsushita