Patents Examined by George Wang
  • Patent number: 7006184
    Abstract: Disclosed is a display comprising a bend aligned nematic liquid crystal cell, a polarizer, and a compensation film containing a positively birefringent material oriented with the optic axis tilted in a plane perpendicular to the liquid crystal cell surface plane. Such displays exhibit an improved viewing angle characteristic.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: February 28, 2006
    Assignee: Eastman Kodak Company
    Inventors: Xiang-Dong Mi, Tomohiro Ishikawa
  • Patent number: 7002662
    Abstract: A method for making an optical element from patterned liquid crystal films by placing a radiation-curing liquid crystal on an aligning function substrate surface, radiating selectively a portion of the liquid crystal film partially to cure it, contacting the partially cured film with an organic solvent to remove the uncured portion of the film and form a pattern in the film, and applying another radiation-curing liquid crystal to a surface of the first film exposed by removing the uncured portion, thereby forming and patterning the second liquid crystal film. The solvent does not dissolve the substrate surface.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: February 21, 2006
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventor: Masanori Umeya
  • Patent number: 6975377
    Abstract: An LCD device comprises a plurality of transparent pixel electrodes, a first substrate, a second substrate, a liquid crystal material, and a light shield device. The first substrate has a plurality of terminals electrically connected to the transparent pixel electrodes via a plurality of outgoing lines, and the terminals are gathered to define a plurality of terminal groups, thereby defining a plurality of outgoing line groups. The second substrate has opposing electrodes opposite to the transparent pixel electrodes. The liquid crystal material is sealed between the first and second substrates. The light shield device is adjacent to the outgoing line groups and the terminal groups and adjacent to the outgoing lines within the outgoing line groups and the terminals within the terminal groups, but not touching the outgoing lines and the terminals for preventing the light leakage on the edge of the liquid crystal display.
    Type: Grant
    Filed: June 3, 2002
    Date of Patent: December 13, 2005
    Assignee: Chi Mei Optoelectronics Corp.
    Inventors: Hsin Fa Hsu, Hsin Ta Lee
  • Patent number: 6724967
    Abstract: A method is disclosed for making a device having one or more deposited layers and subject to a post deposition high temperature anneal. Opposing films having similar mechanical properties are deposited on the front and back faces of a wafer, which is subsequently subjected a high temperature anneal. The opposing films tend to cancel out stress-induced warping of the wafer during the subsequent anneal.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: April 20, 2004
    Assignee: Dalsa Semiconductor Inc.
    Inventors: Luc Ouellet, Annie Dallaire
  • Patent number: 6721057
    Abstract: A spatially modulated interferometer incorporates a beam shearing system having a plurality of reflective surfaces defining separate light paths of equal optical path length for two separate output beams. The reflective surfaces are arranged such that when the two beams emerge from the beam shearing system they contain more than 50 percent of the photon flux within the selected spectral pass band. In one embodiment, the reflective surfaces are located on a number of prism elements combined to form a beam shearing prism structure. The interferometer utilizing the beam sharing system of the invention includes fore-optics for collecting light and focusing it into a beam to be sheared, and a detector located at an exit pupil of the device. In a preferred embodiment, the interferometer has no moving parts.
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: April 13, 2004
    Assignee: California Institute of Technology
    Inventor: Francis M. Reininger
  • Patent number: 6700949
    Abstract: An apparatus for use with a combined CT-PET system wherein a CT source and detector are mounted to a front end of a CT support and the support forms a parking space about a translation axis, a PET detector is mounted to a rear end of the support and a collimator support extends from the PET detector at least part way into the parking space, a collimator is mounted to the collimator support for movement between first and second positions inside the PET detector and outside the PET detector and at least partially within the parking space, respectively, a radiation blocking shield is mounted to the PET detector opposite the CT support to block radiation from that direction from being detected by the PET detector.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: March 2, 2004
    Assignee: GE Medical Systems Global Technology LLC
    Inventors: Larry Susami, Michael Dale Maki, Thomas Robert Schaefer
  • Patent number: 6697451
    Abstract: A method of evaluating a substance scoring system comprises acquiring data from a phantom using an imaging system, moving at least a portion of the phantom during the acquiring step, and generating an actual substance score for the phantom based on the data acquired using the imaging system. The phantom simulates a human organ such as a human heart. The phantom is provided with a motion profile that simulates a motion profile of the human organ.
    Type: Grant
    Filed: September 5, 2001
    Date of Patent: February 24, 2004
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventors: Kishore C. Acharya, Marcela A. Gonzalez, Gary J. Walloch
  • Patent number: 6690872
    Abstract: A silica based optical waveguide is described, comprising a substrate, a core waveguide formed thereon, and an over cladding part comprising a silica based glass with a refractive index lowering dopant and a refractive index increasing dopant added, formed on the substrate so as to cover the core waveguide, wherein a segregation layer with a higher concentration of the refractive index increasing dopant is formed in a part of the over cladding part in contact with the substrate and the core waveguide such that at least a part of the refractive index increase in the segregation layer provided by the refractive index increasing dopant with respect to the part of the over cladding part other than the segregation layer is offset by decline of the refractive index by increasing the amount of the refractive index lowering dopant added in the segregation layer and/or adding another refractive index lowering dopant.
    Type: Grant
    Filed: January 10, 2001
    Date of Patent: February 10, 2004
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi Sasaki, Shigeru Hirai, Nobuhiro Akasaka, Shigeru Tanaka, Chisai Hirose
  • Patent number: 6687440
    Abstract: An optical fiber having an elevated threshold for stimulated Brillouin scattering is provided. The optical fiber includes a core and a cladding surrounding the core with both the core and the cladding designed to guide optical waves through the core while anti-guiding acoustic waves. Moreover, the optical fiber includes other features to alter the mode profile of the acoustic waves and/or to further promote their lateral radiation. For example, the optical fiber can include an irregular coating to alter the mode profile of the acoustic waves. In another example, the optical fiber can include a quarter wave layer surrounding the cladding to promote the lateral radiation of the acoustic waves. In order to further alter the mode profile of the acoustic waves, the cladding can also have a lateral thickness that varies irregularly in a lengthwise direction.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: February 3, 2004
    Assignee: The Boeing Company
    Inventors: Chester Lee Balestra, Robert Rex Rice
  • Patent number: 6636674
    Abstract: The figure-8 optical fiber pulse laser according to the present invention produces stable femto-second optical pulses using DI-NOLM. The optical amplifier is not included in DI-NOLM, instead, it is located at the unidirectional linear loop part. And the noise due to the bidirectional gain difference of the optical amplifier is reduced. Two optical fibers of different dispersion values are used at DI-NOLM. Therefore, the present invention provides a figure-8 optical fiber pulse laser using DI-NOLM improving the switching characteristic. Especially, the stable femto-second laser according to the present invention is applicable for the many applications such as high-speed reaction measurements, laser treatments, and medical lasers.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: October 21, 2003
    Assignee: Kwangju Institute of Science & Technology
    Inventors: Duck Young Kim, Nak Hyoun Sung
  • Patent number: 6628869
    Abstract: A method is described for producing a fiberoptic waveguide with a basic segment (11) and a phase shift segment (12), the basic segment (11) and phase shift segment (12) having fiber cores (K) of the same form and the fiber cores being aligned at a defined angle (&agr;) to one another. In the method, use is made of an optical fiber (1) having a fiber core (K) of the abovenamed form, which fiber is twisted at least approximately by the abovenamed defined angle (&agr;) and held fixed in this torsional position. Subsequently, a stress-relief zone (13) is heated inside the twisted fiber (1) until the torsion is released inside the stress-relief zone (13) and the basic segment (11) is produced on one side of the stress-relief zone (13) and the phase shift segment (12) is produced on the other side. In this case, the fixing of the torsional position is maintained until after solidification of the stress-relief zone (13).
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: September 30, 2003
    Assignee: ABB Research Ltd
    Inventors: Klaus Bohnert, Hubert Brändle, Philippe Gabus
  • Patent number: 6621958
    Abstract: A wavelength division multiplexer/demultiplexer (WDM) for use in an optical network has a structure for holding at least one optical component. A diffraction grating assembly having a substrate is held in relation to the at least one optical component by the structure. A lens assembly having a focal length is held in relation to the at least one optical component. The grating assembly has an angular dispersion that changes with temperature and the product of the focal length and angular dispersion remains constant over temperature.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: September 16, 2003
    Assignee: Confluent Photonics Corporation
    Inventors: Robert H. Dueck, Gregory G. Cappiello
  • Patent number: 6597827
    Abstract: An optical network element using steerable mirrors in an optical switch. A steerable mirror in the switch is connected to a potential bias having a magnitude greater than zero in order to reduce the operating potential of the integrated control system that steers the mirror.
    Type: Grant
    Filed: January 10, 2001
    Date of Patent: July 22, 2003
    Assignee: Tellium, Inc.
    Inventors: Igal Brener, Nicolas Bonadeo, David Peale, Shi-Sheng Lee, Ming Chou
  • Patent number: 6591054
    Abstract: A filament organizer, for attaching an accessory to a section of filament, comprises a frame including a plurality of filament guides. The frame accommodates an accessory positioner adapted for sliding engagement therewith. A pair of spools, attached to the accessory positioner, has a section of filament extending from one to the other so that the filament passes around the plurality of filament guides of the frame to selectively position the section of filament. The accessory positioner includes an accessory cradle that moves from a retracted position to a proximate position. In its retracted position the accessory cradle receives an accessory to be placed in axial alignment with the section of filament. The accessory cradle then moves into the proximate position to attach the accessory to the filament section.
    Type: Grant
    Filed: April 5, 2001
    Date of Patent: July 8, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Martin G. Afflerbaugh, Bryon J. Cronk, Patrick Charles Howard, Gordon Wiegand
  • Patent number: 6580846
    Abstract: Controllable optical switches in response to feedback signals from optical position sensors that measure switch orientations. The optical position sensors may include local sensors that monitor and measure orientations of individual switches and global sensors that monitor and measure overall alignment of signal beams. Such switches may be used to form non-blocking switching arrays.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: June 17, 2003
    Assignee: Versatile Optical Networks, Inc.
    Inventors: Alan C. Burroughs, Leroy Volz, Warren Dalziel, Roger A. Hajjar, Frank Whitehead
  • Patent number: 6577706
    Abstract: An apparatus for measuring the lateral yarn density distribution of a yarn uses selected X-ray radiation. Radiation absorption is determined in a number of narrow planes across the yarn and in two or more rotational orientations. The measuring takes place without any damage to or physical interference with the yarn.
    Type: Grant
    Filed: August 3, 2001
    Date of Patent: June 10, 2003
    Assignee: The Hong Kong Polytechnic University
    Inventors: Ka-fai Choi, Yuen-wah Wong
  • Patent number: 6577790
    Abstract: An optical device is provided, which includes optical fibers and rod lenses with their optical axes all being allowed to coincide, particularly, through optimization of the angles of faces of the rod lenses processed to have slopes, wherein the path of a center light ray entering an input fiber is allowed to coincide with the optical axes.
    Type: Grant
    Filed: January 12, 2001
    Date of Patent: June 10, 2003
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventor: Shigeo Kittaka
  • Patent number: 6574414
    Abstract: A lightpipe apparatus and method includes a lightpipe body for transmitting light. The lightpipe body includes a receiving end portion for receiving the light and a display end portion. The lightpipe body further includes a first refractive surface disposed between the receiving end portion and the display end portion. An opaque substrate is applied to the first refractive surface to reflect the light toward the display end portion.
    Type: Grant
    Filed: January 8, 2001
    Date of Patent: June 3, 2003
    Assignee: 3Com Corporation
    Inventors: Kevin J. Schechtel, Kathleen A. Stunkel, William L. Bollig
  • Patent number: 6567496
    Abstract: A cargo inspection apparatus and process includes scanning containers with x-rays along two different planes. Outputs from x-ray sensors along the two different planes are collected for use in establishing the presence of contraband within the container. Using the sensor output data, images of the container are provided and suspicious areas and background areas are identified on the images. By using representative suspicious area and background area geometry and compensating in the suspicious area for the effective estimated background thereat, the average atomic number and density of the suspicious contraband is established. The average atomic number and density is then compared with known atomic numbers and densities of contraband materials and an output indicative of whether the suspicious area falls within the parameters of actual contraband material is provided.
    Type: Grant
    Filed: October 11, 2000
    Date of Patent: May 20, 2003
    Inventor: Boris S. Sychev
  • Patent number: 6553175
    Abstract: A method and apparatus for variable optical attenuation is disclosed. A variable optical attenuator is provided having a housing. Within the housing, a filter is mounted on a drive shaft of a motor such that the drive shaft passes through a substantially center point of the filter. The filter has a monotonically increasing filter gradient that begins at a lower optical density and gradually increases in optical density in a diametrical pattern. An input optical fiber provides a light signal to be attenuated. The input optical fiber introduces the light signal, which passes through a first collimator, through the filter, through a second collimator, and to an output optical fiber which exits the housing. When activated, the motor rotates the drive shaft to position the filter to a desired attenuation position for attenuating the light signal.
    Type: Grant
    Filed: January 17, 2001
    Date of Patent: April 22, 2003
    Assignee: Sycamore Networks, Inc.
    Inventor: Martin Jaspan