Patents Examined by Leo Boutsikaris
  • Patent number: 7031084
    Abstract: An imaging system including: a lens; a dichroic filter positioned in front of the lens; and a high pass filter positioned between the lens and the dichroic filter. An appropriate design coordinating the components of such an imaging system diminishes imaging artifacts related to wide-angle imaging of fluorescent objects.
    Type: Grant
    Filed: July 23, 2003
    Date of Patent: April 18, 2006
    Assignee: Eastman Kodak Company
    Inventors: Douglas L. Vizard, William E. Mclaughlin
  • Patent number: 7012749
    Abstract: A method of performing a DFT (discrete Fourier transform) or a DFT derived transform on data, comprising: providing spatially modulated light having spatial coherence, said spatially modulated light representing the data to be transformed; Fourier transforming said spatially modulated light, using an at least one optical element; and compensating for at least one of a scaling effect and a dispersion effect of said at least one optical element, using an at least one dispersive optical element.
    Type: Grant
    Filed: May 19, 2000
    Date of Patent: March 14, 2006
    Assignee: Lenslet Ltd.
    Inventors: David Mendlovic, Efraim Goldenberg, Naim Konforti, Zeev Zalevsky, Aviram Sariel
  • Patent number: 6976796
    Abstract: A method for handling a fusion-spliced optical fiber and a transferring jig for transporting the optical fiber are provided. The jig is capable of holding the fusion-spliced optical fiber in a state in which a given tension is applied at the spliced portion, and stopping the application of such tension if needed. The jig is easy to transport and set to each of separate processing processes. In the method, a fusion-spliced optical fiber is clamped at coated portions thereof on both sides of the fusion-spliced portion by a pair of clamps of the jig and transported by the jig holding the optical fiber in a state wherein a given tension is applied thereto through the clamps.
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: December 20, 2005
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Rei Koike, Kazunari Hattori, Tomomi Moriya
  • Patent number: 6963431
    Abstract: A method of rendering image data for full parallax autostereoscopic displays. The method is based on a double frustrum camera technique, where two cameras provide image data from opposing sides of an image plane. The near clipping plane is located on the image plane. The distance between the near clipping plane and the eyepoint of the camera frustra is adjusted to minimize or avoid clipping.
    Type: Grant
    Filed: January 28, 2002
    Date of Patent: November 8, 2005
    Assignee: Zebra Imaging, Inc.
    Inventors: Mark E. Holzbach, David T. Chen
  • Patent number: 6958859
    Abstract: A grating structure with a dielectric coating is disclosed that operates efficiently away from the blaze angle in low order with a high diffraction efficiency and high wavelength dispersion. Such grating structure can be employed in Littrow configuration to provide, for example, cavity feedback in excimer lasers.
    Type: Grant
    Filed: August 2, 2002
    Date of Patent: October 25, 2005
    Assignee: Chromaplex, Inc.
    Inventors: John Hoose, Robert Frankel, Evgeny Popov, Michel Nevière
  • Patent number: 6956706
    Abstract: The invention concerns a composite diamond window (10) which includes a CVD diamond window pane (12) which is mounted to a CVD diamond window frame (14). The frame (14) is thicker than the pane (12) and has a radiation transmission aperature (16) therein across which the pane spans.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: October 18, 2005
    Inventor: John Robert Brandon
  • Patent number: 6952314
    Abstract: The present invention provides a method of manufacturing an ND filter having a gradation density distribution, the ND filter, and an aperture device and a camera having the ND filter. A structure thereof is as follows. The method of manufacturing an ND filter having at least two kinds of films on a substrate includes the steps of: forming a film of at least one layer other than an outermost layer having a gradation density distribution while rotating a slit mask integrally with the substrate; and forming a film of the outermost layer without using the slit mask.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: October 4, 2005
    Assignee: Canon Denshi Kabushiki Kaisha
    Inventors: Michio Yanagi, Fumie Ishii, Masayuki Uchiyama, Takayuki Wakabayashi
  • Patent number: 6907160
    Abstract: Apparatus for filtering an optical input signal includes a coupler and an arrayed waveguide grating connected to the coupler having a phase shifting region. The phase shifting region is a back wall of a free space region of the arrayed waveguide grating with concentric image and reflector surfaces. Radial waveguides between the surfaces are divided into alternating regions of wider and thinner sets of waveguides. A corresponding change in optical length alters the phase of the input signal which forces an output signal of a desired wavelength to appear at a desired port of the filter.
    Type: Grant
    Filed: April 23, 2003
    Date of Patent: June 14, 2005
    Assignee: Lucent Technologies Inc.
    Inventor: Corrado Dragone
  • Patent number: 6898009
    Abstract: The present invention is directed to an improvement in a diffractive display suitable for presenting graphic and the like displays. Broadly, a novel embodiment is realized from a holographic diffraction pattern carried by a magnet or element and an electrically energizable coil magnetically coupled with said magnet that is energizable for movement of the magnet. Rotation of the holographic diffraction pattern generates a display using the diffracted light from the holographic diffraction grating. Another novel embodiment is realized from a faceted rotatable element (FRE) having an array of facets each bearing a diffraction grating and a source energizable for rotation of the FRE from a resting station to a viewing station. Rotation of the FRE generates a display using the diffracted light from the diffraction gratings.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: May 24, 2005
    Assignee: Luckoff Display Corporation
    Inventors: Jefferson E. Odhner, Donald L. Cullen, Ken G. Wasson, James E. Dvorsky
  • Patent number: 6885484
    Abstract: A simple, compact optical system is provided that includes a transmissive optical element and a HOE but that nevertheless does not require an extra optical element for the correction of chromatic aberration. The HOE is designed to have diffractive efficiency for each of R, G, and B light beams and have different focal lengths for those light beams so as to correct the longitudinal chromatic aberration produced by a rectangular parallelepiped prism. This eliminates the need for an extra means for correcting the chromatic aberration produced by the prism. The HOE may be designed to exhibit different angles of diffraction for the R, G, and B light beams so as to correct the chromatic aberration produced perpendicularly to the optical axis by a wedge-shaped prism.
    Type: Grant
    Filed: July 15, 2003
    Date of Patent: April 26, 2005
    Assignee: Minolta Co., Ltd.
    Inventor: Ichiro Kasai
  • Patent number: 6885483
    Abstract: In a hologram screen for reproducing an image based on an output light obtained by scattering and diffusing an image light from an image projector, when a white light (image light) is projected on the hologram screen; and when a distance between two points at optional two points A and B on a surface of the hologram screen is given by 20 cm or less, and a value of the CIE 1976 chromaticity coordinate (u?, v?) at the point A is given by (u?A, v?A) and the value of the CIE 1976 chromaticity coordinate (u?, v?) at the point B is given by (u?B, v?B); the output light perpendicularly from the surface of the hologram screen has a color distribution in which a color difference ?u?v?between two points A and B is derived from the following formula (1) and given by 0.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: April 26, 2005
    Assignee: DENSO Corporation
    Inventor: Kenichiro Takada
  • Patent number: 6879450
    Abstract: A pattern structure has at least two different color filter elements disposed one beside the other on a carrier substrate. Each element includes a layer of dielectric material, the layer of dielectric material residing at at least one of the filter elements on a layer of a material that is resistant to activated oxygen or activated water. The layer of resistant material has a second surface pointing toward the substrate and is made of silicon or silicon dioxide.
    Type: Grant
    Filed: July 25, 2002
    Date of Patent: April 12, 2005
    Assignee: Unaxis Trading AG
    Inventors: Johannes Edlingger, Reinhard Sperger, Maria Simotti
  • Patent number: 6879451
    Abstract: The present application describes embodiments of a neutral density color wheel filter. According to one embodiment, a neutral density color wheel (100) includes an opaque coating (135) over one or more color segments (120, 130, 140, 150, 160, 170) with randomly placed transmissive regions (131). The transmissive regions (131) can be configured to substantially transmit incident light and the opaque coating (135) can be configured to substantially block or absorb the incident light. Alternatively, the transmissive regions (131) can be configured to substantially transmit the incident light. The color segments with opaque coating (135) and transmissive regions (131) substantially eliminate light recycling due to the reflection from the color wheel. The light transmission from the color wheel (100) is independent of the optics of a display system.
    Type: Grant
    Filed: January 7, 2004
    Date of Patent: April 12, 2005
    Assignee: Texas Instruments Incorporated
    Inventors: Gregory J. Hewlett, Steven M. Penn, Greg S. Pettitt, Dana F. Segler, Jr.
  • Patent number: 6876787
    Abstract: A device for transmitting optical waves has a structure having at least an optical guide element wherein the structure comprises hollow parts or notches (9, 10) adapted to receive the end parts (13, 14) of an optical fiber (12) such that the fiber spans the surface (11a) of the structure separating the hollow parts and the ends of the optical fiber are respectively optically coupled to optical guide elements (7, 8) of the structure. The invention also concerns a method for making such a device which consists in etching the notch by cutting off the end of the optical micro-guide. The device is useful for producing optical switches.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: April 5, 2005
    Assignee: Opsitech--Optical System on a Chip
    Inventors: Michel Bruel, Patrick Mottier, Joël Alanis
  • Patent number: 6876505
    Abstract: A color wheel is fabricated with filter sectors formed on both surfaces of a substrate such that filter sectors adjacent to each other are disposed respectively on the top and bottom side surfaces of the substrate, whereby structures as means for demarcating each of the filter sectors can be shaped on the substrate at one time so that the adjacent filter sectors can be positioned with respect to each other with an accuracy of the demarcation of the structures without positioning masking jigs every time each filter is formed.
    Type: Grant
    Filed: May 24, 2004
    Date of Patent: April 5, 2005
    Assignee: Minebea Co., Ltd.
    Inventor: Shinichi Niwa
  • Patent number: 6876474
    Abstract: A method for tracking particles and life forms in three dimensions and in time. The present invention applies a numerical reconstruction approach to digital in-line holographic microscopy images in order to generate a time sequence hologram representing the trajectory of objects such as particles and life forms. By subtracting consecutive (in time) holograms of a particle sample volume and then adding the resulting differences, a final hologram is constructed that contains the time evolution of the object trajectory free from spurious background interference effects.
    Type: Grant
    Filed: November 26, 2003
    Date of Patent: April 5, 2005
    Assignee: Dalhousie University
    Inventors: H. Juergen Kreuzer, Manfred H. Jericho
  • Patent number: 6873463
    Abstract: Disclosed is a diffractive optical element which is made of at least two materials of different dispersions and which includes at least two diffraction gratings being accumulated one upon another, wherein each diffraction grating is formed on a curved surface of a substrate, and wherein a diffraction grating, of the at least two diffraction gratings, in which a curvature radius of the curved surface and a curvature radius of a grating surface in a portion where a grating pitch is largest, have different signs, is one of the at least two diffraction gratings which has a smallest grating thickness.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: March 29, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takehiko Nakai
  • Patent number: 6873480
    Abstract: An optical element is disposed between cover glasses, and an optical coupling liquid is injected between the optical element and the cover glasses to form an optical package. An adhesive provides a liquid tight seal between the cover glasses. The optical element is a retarder, filter, polarizing film, or other optical element. Spacers are placed between the optical element and cover glasses to maintain space between the optical element and the cover glasses and assist in distribution of the optical coupling liquid. Applications include prism assemblies and other optical products. The invention may also be applied to joining optical components with liquid joints. For example, an optical switch includes a controllable retarder in a liquid filled joint.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: March 29, 2005
    Assignee: Lightmaster Systems, Inc.
    Inventors: Michael Detro, Arthur Berman
  • Patent number: RE38847
    Abstract: Caged reagent release experiments are carried out by introducing laser light of a laser light source for the Caged reagent release of a first reflected illumination optical system light path into a sample side through a first dichroic mirror on a cube turret and also introducing excitation light of a mercury lamp for the excitation light irradiation of a third reflected illumination optical system light path into the sample side through a first dichroic mirror on a slider. Laser trap experiments are carried out by introducing excitation light of a mercury lamp for the excitation light irradiation of a second reflected illumination optical system light path into the sample side through a second dichroic mirror on the cube turrent and also introducing laser light from the laser light source for the laser trap of the third reflected illumination optical system light path into the sample side through a second dichroic mirror on the slider.
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: October 25, 2005
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Yukio Nonoda, Yasushi Aono, Katsuyuki Abe
  • Patent number: RE39261
    Abstract: A solid state laser beam scanning system having a single crystal silicon deflection and scanning mirror integrated with a laser diode. By combining the techniques of deep reactive ion etching of silicon with solder bump bonding techniques, completed and tested laser diodes are integrated with silicon substrates supporting micro-electro-mechanical systems layers.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: September 5, 2006
    Assignee: Xerox Corporation
    Inventors: Philip D. Floyd, Decai Sun, Joel A. Kubby