Patents Examined by Fayez Assaf
  • Patent number: 7093987
    Abstract: The present invention provides a fiber optic lens assembly and method of mounting a lens array in the same. The fiber optic lens assembly includes a housing including a lens mounting aperture formed therein. The housing includes at least one feature adjacent the lens mounting aperture. A lens array is positioned within the lens mounting aperture and adjacent the feature. At least one biasing member is positioned adjacent the lens array. The biasing member forces the lens array against the feature. The method includes positioning the lens array adjacent at least one feature formed in a lens mounting aperture of a housing. At least one biasing member is inserted in the lens mounting aperture adjacent the lens array. A cornering force is applied against the lens array with the biasing member.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: August 22, 2006
    Inventors: Johnny R. Brezina, Christopher M. Gabel, Brian M. Kerrigan, Roger T. Lindquist, Gerald D. Malagrino, Jr., James R. Moon
  • Patent number: 6903851
    Abstract: The present invention relates to a method for producing light-scattering elements by holographic illumination of a layer (10) of a photo-sensitive material on a support plate (1) and subsequent development of the layer (10) in order to generating a surface structure. The method is distinguished in that the illumination occurs using at least two mutually coherent luminous beams (2,3) which have passed through one or a plurality of primary diffusers (8,9) respectively were reflected at one or a plurality of primary diffusers, the luminous beams (2,3) being irradiated from different directions and being at least partially superimposed on the layer (10) while forming an interference pattern. This method permits producing diffusers having a leveled scatter profile in a simple manner.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: June 7, 2005
    Assignee: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
    Inventors: Volkmar Boerner, Andreas Gombert, Benedikt Bläsi
  • Patent number: 6898347
    Abstract: An optical network may include a detector for detecting the power of each of a plurality of channels of a wavelength division multiplexed optical signal in one embodiment of the present invention. Each channel may be conveyed to an interface underneath a detector by way of a core formed in the substrate. The interface may include a trench with one side surface angled to form a reflector to reflect light upwardly to be detected by the detector. The trench may be filled with a convex microlens.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: May 24, 2005
    Assignee: Intel Corporation
    Inventors: Mahesh R. Junnarkar, Anirban Bandyopadhyay
  • Patent number: 6882782
    Abstract: The invention concerns a photonic device comprising a first section including a material adapted to interact with photons, a second section including a material adapted to interact with photons, with an area of said first section and an area of said second section abutting each other wherein at least a part of said first area and a part of said second area defines a low temperature bonding area to provide adaptability for a plurality of applications based on a combination of materials having specific characteristic benefits, however without introducing unwanted effects having a negative influence on the quality of optical signals.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: April 19, 2005
    Assignee: Schott Glas
    Inventors: Samuel D. Conzone, Joseph S. Hayden, Alexander J. Marker, III, Marren Walther, Rainer Liebald, Ulrike Beer, Ulrich Peuschert, Ruediger Sprengard, Tobias Käleer
  • Patent number: 6874891
    Abstract: An improved system is disclosed for displaying multi-image or animated holograms, in which the light that is used to illuminate the hologram is reflected to the hologram through one or more mirrors, and the angle at which the incoming light illuminates the hologram is varied over time.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: April 5, 2005
    Inventor: John Stuart Fleming
  • Patent number: 6865002
    Abstract: An image exposure recorder for exposure-recording a holographic stereogram image or a hologram image on a recording medium for hologram. The recorder has an inverse correction system for rotating the polarization plane of a reference light (R) by means of a half-wave plate (11), directing the reference light (R) to a hologram recording medium (3), and measuring the intensity of a part of the reference light (R) transmitted through a polarizer (12) out of the reference light (R) transmitted through a part of the area of the hologram recording medium by means of a photodetector (13). In the inverse correction system, the angle of rotation of the half-wave plate is so determined that the intensity of the reference light (R) determined by the photodetector may be minimum or maximum.
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: March 8, 2005
    Assignee: Sony Corporation
    Inventors: Nobuhiro Kihara, Megumi Ezura, Akira Shirakura
  • Patent number: 6859568
    Abstract: A polarization transformer/PMD compensator chip contains a differential TE-TM phase modulator at its input. The modulator generates a TE-TM phase modulation. The mode converter voltages are driven with driving signals that are free of DC components. DC drift is thereby safely avoided.
    Type: Grant
    Filed: July 22, 2003
    Date of Patent: February 22, 2005
    Assignee: Siemens Aktiengesellschaft
    Inventors: Reinhold Noe, David Sandel
  • Patent number: 6850346
    Abstract: In a storing mode of an apparatus for storing and retrieving a sequence of digital page data, a first/second complex reference beam and a modulated signal beam converge on a storing location to generate a sequence of first/second interference patterns to be sequentially stored on a holographic medium. A shift selectivity of the first complex reference beam is larger than that of the second complex reference beam so that the second interference pattern is used as a servo pattern to sequentially determine where the first interference patterns have been stored.
    Type: Grant
    Filed: June 11, 2003
    Date of Patent: February 1, 2005
    Assignee: Daewoo Electronics Corporation
    Inventor: Kun Yul Kim
  • Patent number: 6850366
    Abstract: The invention provides a multi-cavity filter, and in particular, a multi-cavity bandpass filter having a predetermined centre wavelength. The filter includes a plurality of cavities, each cavity including two partially reflecting films separated by a layer of dielectric material. The two partially reflecting layers are formed from layers of material having alternating high and low refractive indices. Each layer of dielectric material has a thickness that is an integral number of half-waves of the centre wavelength. The filter has an asymmetric structure that causes the reflected chromatic dispersion from one side of the filter to be reduced relative to the reflected chromatic dispersion from the other side.
    Type: Grant
    Filed: October 9, 2002
    Date of Patent: February 1, 2005
    Assignee: JDS Uniphase Corporation
    Inventors: Karen Denise Hendrix, Charles Andrew Hulse, Frederik Kevin Zernik
  • Patent number: 6843607
    Abstract: A three-storied structure optical communications module having a top case, a middle case and a bottom case which are piled and coupled in a vertical direction. The middle case has a silicon bench with M (channel number) lightwaveguides, a first WDM1, a second WDM2, M (channel number) laser diodes for generating transmitting signals ?1. The top case has a set of ?2 receiving photodiodes PD1s of the channel number M. The bottom case has another set of ?3 receiving photodiodes PD2s. ?2 signal beams and ?3 signal beams propagating in optical fibers go into the lightwaveguides on the middle case. The ?2 signal beams are reflected midway on the lightwaveguides by the WDM1 upward to the photodiodes PD1s on the top case and are converted into photocurrents by the photodiodes PDs. The ?3 signal beams are reflected halfway on the lightwaveguides by the WDM2 downward to the photodiodes PD2s and are converted into photocurrents by the photodiodes PD2s.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: January 18, 2005
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Hiromi Nakanishi, Takeshi Okada
  • Patent number: 6844975
    Abstract: The invention provides a substantially athermal etalon. In one embodiment, the multi-cavity etalon includes at least one free-standing multi-layer thin film and is rendered thermally stable through the use of the free-standing multi-layer film and spacers having predetermined thermal expansion coefficients. In another embodiment, the multi-cavity etalon is rendered thermally stable through the use of mixed spacers.
    Type: Grant
    Filed: October 9, 2002
    Date of Patent: January 18, 2005
    Assignee: JDS Uniphase Corporation
    Inventors: Robert B. Sargent, Charles Andrew Hulse
  • Patent number: 6844949
    Abstract: In a storing mode of an apparatus for sequentially storing and retrieving digital page data, a first and second complex reference beams and a modulated and second signal beams converge on a first/second location to generate a sequence of first and second interference patterns to be sequentially stored on a holographic medium. A shift selectivity of the first complex reference beam is larger than that of the second complex reference beam so that the second interference pattern is used as a servo pattern to sequentially determine where the first interference patterns have been stored.
    Type: Grant
    Filed: June 11, 2003
    Date of Patent: January 18, 2005
    Assignee: Daewoo Electronics Corporation
    Inventor: Kun Yul Kim
  • Patent number: 6844946
    Abstract: An optical add/drop filter is formed using a hologram which is tuned to a wavelength in an optical signal. The diffraction condition of the hologram may be varied to vary the in add or drop content.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: January 18, 2005
    Assignee: California Institute of Technology
    Inventors: Karsten Buse, Demetri Psaltis
  • Patent number: 6842271
    Abstract: A rain sensor for a motor vehicle, having a transmitter emitting radiation, a receiver, and a holographically embodied diffractive element that has a linear-grating-like structure.
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: January 11, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Helmut Sautter, Armin Jerger, Frank Wolf, Gerhard Hochenbleicher, Vincent Thominet, Zishao Yang
  • Patent number: 6840641
    Abstract: An external rearview mirror includes a holder for affixing the mirror to a motor vehicle. A carrier plate is located in a housing that is secured to the holder. At least one mirror assembly with a mirror pane is mounted pivotally on the carrier plate in the housing. At least one means of adjustment is mounted on the carrier plate and bound to the mirror assembly. A base plate is attached to the carrier plate, the base plate having a honeycomb structure with a multiplicity of cells on at least one side. The cells are integral and normal to the base plate and may vary in both height and diameter.
    Type: Grant
    Filed: August 18, 2003
    Date of Patent: January 11, 2005
    Assignee: Lang-Mekra North America, LLC
    Inventors: Heinrich Lang, Alexander Stenzel
  • Patent number: 6842272
    Abstract: The invention provides a hologram plate which is used with the double-focus replication process, and which is integrated with a spacer to impart marring resistance thereto, and is integrated with a light absorbing layer to allow zero-order light and first-order light to have substantially the same intensity. This hologram plate 42 comprises an array of collective element holograms for diffracting parallel light incident thereon at a specific wavelength and a specific incident angle in such a way that the light is converged onto a specific focal length position. The hologram plate 42 is a multilayer structure made up of a first transparent substrate 31, a hologram layer 32, an adhesive layer 33 and a second transparent substrate 41. The second transparent substrate 42 defines a surface in contact with a hologram photosensitive material 53 during hologram replication.
    Type: Grant
    Filed: March 16, 2004
    Date of Patent: January 11, 2005
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Keiko Sekine, Hiroshi Kishimoto, Masaki Katsumata, Yoichi Higuchi, Nobuhiko Ichikawa, Tadatsugu Onuma
  • Patent number: 6839176
    Abstract: An environmentally stable Silver containing mirror or thin-film optical filter having very high reflection values over a large spectral and angular range, and a method for constructing the mirror, or thin-film optical filter, comprising using a substrate that has been exposed to an Argon rich ion stream to prepare the surface. A medium index material is then deposed on the surface with Argon ion bombardment. The Silver is then deposited until it is opaque. A second deposition of the medium index material is next done with the Argon ion bombardment. The coating is then followed with a standard ion assisted deposed optical film to maximize reflection at the desired wavelength and angle of incidence.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: January 4, 2005
    Assignee: Ocean Optics, Inc.
    Inventors: Philip E. Buchsbaum, James D. Lane
  • Patent number: 6839173
    Abstract: A reflection type diffraction grating according to the present invention has a structure in which a metal film as a first layer with reflectance not lower than 30% with respect to the wavelength of incident light and a transparent dielectric film as a second layer are laminated successively on the surface of the reflection type diffraction grating. With respect to the wavelength of incident light, the metal film has a refractive index selected to be not higher than 1.5 and an extinction coefficient selected to be not smaller than 6.0. The transparent dielectric film has a refractive index selected to be in a range of from 1.30 to 1.46, both inclusively, with respect to the wavelength of incident light and has an optical film thickness selected to be in a range of from 0.20? to 0.38?, both inclusively, when ? is the wavelength of incident light.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: January 4, 2005
    Assignee: Nippon Sheet Glass, Co., Ltd.
    Inventors: Katsuhide Shimmo, Shinji Kawamoto, Terufusa Kunisada, Kenichi Nakama
  • Patent number: 6836347
    Abstract: A viewing optical system for display apparatus, includes an ocular optical member for leading an observation image formed by an observation image forming member to an exit pupil has a first prism member and a second prism member. The first prism member has a first entrance surface, a reflecting surface and a first exit surface disposed to face each other across a first prism medium. The second prism member has a second entrance surface and a second exit surface disposed to face each other across a second prism medium. The first and second prism members are cemented together with a holographic element interposed between the first exit surface and the second entrance surface. The reflecting surface has a positive power. The first exit surface and the second entrance surface are each formed from a plane or cylindrical surface. The holographic element also has a plane of cylindrical surface.
    Type: Grant
    Filed: November 20, 2003
    Date of Patent: December 28, 2004
    Assignee: Olympus Corporation
    Inventors: Takahiro Amanai, Tetsuhide Takeyama, Masachika Watanabe
  • Patent number: 6833957
    Abstract: The invention provides a tunable filter that can minimize adjacent channel cross talk despite an increase of a number of available wavelengths and quickly switch a wavelength to be used, and manufacturing method thereof, and also an optical switching device comprising such tunable filter. In a tunable filter having a Fabry-Perot etalon structure, not less than two cavity gaps 114 to 116 are provided and separation between the cavity gaps is controlled by any of electrostatic drive, electromagnetic drive or piezoelectric drive. In this case, the cavity gaps can be formed through the steps of forming a sacrificial layer in advance where a cavity gap is to be formed; forming a plurality of optical multilayer films 100 to 103; and removing the sacrificial layer by etching. Substrates 107 and 109 are combined through a supporting column 108.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: December 21, 2004
    Assignee: NEC Corporation
    Inventor: Akinobu Sato