Patents Examined by Jon W. Henry
  • Patent number: 5838497
    Abstract: A chromatic aberration correcting element that is a simple lens having at least one aspheric surface, the radius of curvature of which increases from the optical axis toward the periphery. At least one of the surfaces is formed as a diffraction lens surface that consists of annular segments that shift discretely in a direction in which the lens thickness increases as a function of the distance from the optical axis. Also disclosed is a chromatic aberration correcting device having annular segments formed in steps on either a light entrance face or a light exit face or both. The annular segments are composed of planes perpendicular to and concentric with the optical axis.
    Type: Grant
    Filed: February 18, 1997
    Date of Patent: November 17, 1998
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventor: Koichi Maruyama
  • Patent number: 5838489
    Abstract: In a multi-lens infrared objective with wide band chromatic correction, more particularly in the spectral range from 1.4 to 5 .mu.m silicon is employed as a material for lenses with a negative focal length. In this respect the lenses consist of materials, which as regards their dispersion curves are selected from three different material group, of which the first material group comprises materials, whose short wave absorption bands are relatively close to the shortest wavelength to be corrected, the second group comprises materials, whose long wave absorption bands are closer to the spectral range to be corrected than the short wave ones and the third group comprises materials, whose relative absorption band positions are between the materials of the first and second groups.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: November 17, 1998
    Assignee: Britishi Aerospace
    Inventor: Matthias Erdmann
  • Patent number: 5838469
    Abstract: Embodiments of the invention include a data receiving apparatus and method of a holographic or other page-wise memory system for processing information read from the memory system's storage medium. The data apparatus includes a multi-dimensional array of pixel elements comprised of pixel detectors and corresponding pixel circuit. The pixel detectors detect information such as light information representing data stored in the memory system. The pixel circuits determine a value representative of the information detected by the individual pixel detectors. Additionally, the apparatus includes active processing circuitry advantageously fabricated in conjunction with the pixel circuits to provide additional "on-chip" processing capabilities, including analog inter-pixel processing. The advantageous arrangement of the additional processing improves processing times, reduces the unprocessed data flow out of the apparatus, and reduces circuitry design space and cost.
    Type: Grant
    Filed: December 26, 1996
    Date of Patent: November 17, 1998
    Assignee: Lucent Technologies Inc.
    Inventors: Scott Patrick Campbell, Kevin Richard Curtis
  • Patent number: 5838467
    Abstract: A method for processing information stored in a holographic system, comprising the step of intersecting a reconstruction reference beam with a storage medium of a holographic system, the storage medium exhibiting birefringence at least partially due to coherent storage of information, wherein the reconstruction reference beam has a polarization at least 5.degree. different from the polarization exhibited by a storage reference beam during storage information in the storage medium.
    Type: Grant
    Filed: June 3, 1997
    Date of Patent: November 17, 1998
    Assignee: Lucent Technologies Inc.
    Inventors: Kevin Richard Curtis, Michael C. Tackitt
  • Patent number: 5838496
    Abstract: A diffractive multi-focal objective lens formed, macroscopically, as a double convex lens having convex aspherical surfaces of which radii of curvatures are larger as a function of distance from the optical axis. One lens surface is provided with a microscopic diffractive lens construction that is formed as ring zones concentric about the optical axis. The diffractive lens construction is designed so that the higher the diffractive order, the shorter the focal length. For example, a first order diffractive light beam forms a first focal point F1 on the optical axis, and a second order diffractive light beam forms a second focal point F2 on the optical axis that is nearer to the lens than the first focal point F1.
    Type: Grant
    Filed: August 27, 1996
    Date of Patent: November 17, 1998
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Koichi Maruyama, Junji Kamikubo
  • Patent number: 5838466
    Abstract: Replicas of a surface relief hologram, or other light diffraction pattern, are coated with a transparent material having substantially the same refractive index as the holograms to conform to the surface relief patterns and thus hide the hologram. The coating is pealed by hand off of the surface relief pattern in order to reveal an image visible in light reflected from the hologram. Such hidden holograms can be attached to a greeting card to reveal a greeting when the coating is removed, attached to pages of magazines or books to carry an advertising message, and the like. Other uses include making lottery tickets or other indications of a prize from such holograms, since the indication of any prize won by the holder remains hidden until the coating is pulled off, even though the coating is optically transparent.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: November 17, 1998
    Assignee: Printpack Illinois, Inc.
    Inventor: Donald W. Mallik
  • Patent number: 5838468
    Abstract: The method for forming a fine pattern on a substrate disclosed includes a step of preparing a hologram having a pattern, a step of irradiating material waves (de Broglie waves) such as neutral beams, ion beams and electron beams on the hologram, and a step of imaging the pattern on the substrate with the material waves being interfered by passing through the hologram. The light source has a source that emits a beam having a coherent wave front. Since the fine patterns are formed by utilizing the interference of material waves, the minimum processing precision can be enhanced to the extent of the wavelength of the material wave.
    Type: Grant
    Filed: April 12, 1996
    Date of Patent: November 17, 1998
    Assignee: NEC Corporation
    Inventors: Shoko Manako, Jun-ichi Fujita, Yukinori Ochiai, Shinji Matsui
  • Patent number: 5835262
    Abstract: A high-accuracy multi-wavelength optical microscope for providing a satisfactory contrast of image and much information about a sample. The microscope includes a plurality of light sources, a wavelength varietor independently varying the wavelength of the individual light sources, and polarization plane rotators on the optical path for each light source.
    Type: Grant
    Filed: December 28, 1995
    Date of Patent: November 10, 1998
    Assignees: Research Development Corporation of Japan, Olympus Optical Co., Ltd.
    Inventors: Yoshinori Iketaki, Masaaki Fujii
  • Patent number: 5835247
    Abstract: A display system for a binocular helmet visor having image projectors projecting images on a semi-reflecting internal wall of the visor of the helmet. One image faces the right eye and another image faces the left eye. The shape of the surface of the internal wall of the visor makes it desirable to cross the optical paths of the two projectors at the helmet wearer's forehead in order to limit the deformation of the images. The optical paths of the two projectors are folded with holographic mirrors in a manner which results in a compact structure, reducing the space required for the visor and the overall weight of the helmet.
    Type: Grant
    Filed: February 6, 1996
    Date of Patent: November 10, 1998
    Assignee: Sextant Avionique
    Inventor: Laurent Monnier
  • Patent number: 5835245
    Abstract: Security and identity cards including at least one hologram of the card, or part of the card, are disclosed. Holographic methods and materials to detect and prevent forgery in identity cards such as credit cards and access cards to security areas are disclosed. This invention employs microholograms that are recorded in very small areas on the card and that are not readily visible to the bearer. Special recording materials for high efficiency holograms are used to allow the confinement of the recording in an about 10 to about 100 micron size area. Apparatus for the recording and reading of the holograms are also disclosed.
    Type: Grant
    Filed: September 1, 1994
    Date of Patent: November 10, 1998
    Assignee: Board of Regents, The University of Texas System
    Inventors: Jean J. Robillard, Eric Chesak
  • Patent number: 5835264
    Abstract: The invention is directed to a method and arrangement for generating stereoscopic images of an object. The method includes the steps of illuminating an object with an illuminating beam; masking the illuminating beam to generate a first component beam to illuminate the object at a first angle and provide a first image of the object to a first viewing eye; again masking the illuminating beam to generate a second component beam to illuminate the object at a second angle and to provide a second image of the object to a second viewing eye; and, alternately repeating the last two steps at a frequency above the flicker frequency of the human eye. In the arrangement of the invention, a beam generating device alternately generates first and second illuminating beam components which illuminate the object via illuminating optics at respectively different angles to produce respective images of the object.
    Type: Grant
    Filed: March 4, 1996
    Date of Patent: November 10, 1998
    Assignee: Carl Zeiss Jena GmbH
    Inventors: Hans Tandler, Gudrun Nordt, Reed Werlich, Karl-Heinz Geier, Johannes Knoblich, Gunter Schoppe
  • Patent number: 5831765
    Abstract: The 2-D/3-D compatible type image display according to the present invention is constructed by arranging a liquid crystal panel which is a display panel, a dispersed type liquid crystal panel which is a diffusing effect on/off panel, a light separating means, a backlight which is a plane light source, so as to be nearer to an observer in this order. It is possible by processing the image signal supplied to the liquid crystal panel to form a first group of pixels lined in longitudinal direction of a picture and a second group of pixels lined in the same direction of the picture alternately formed in horizontal direction, and to make the first group of pixels and the second group of pixels have different observing points respectively as left eye pixels and right eye pixels (when 3-D images are displayed), or to make the first group of pixels and the second group of pixels have the same observing points with each other (when 2-D images are displayed).
    Type: Grant
    Filed: May 22, 1996
    Date of Patent: November 3, 1998
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Eiji Nakayama, Goro Hamagishi, Atsuhiro Yamashita, Ken Mashitani, Masahiro Sakata, Yoshihiro Furuta, Shinobu Kohtani, Kenji Taima, Shugo Yamashita
  • Patent number: 5831764
    Abstract: A drive system for the conversion of a rotary motion into a linear motion contains a belt drive similar to a block and pulley system, and a system of a rack and pinion that is driven synchronously with the belt drive. The pinion and the rack are adjusted with respect to each other such that the teeth of the pinion engage with relatively large play in the rack. When driving under normal load, the drive takes place without loading of the rack and pinion system by the belt drive, so that the reversal backlash and the play of the rack and pinion system remain without effect on the displacement motion. When an overloading of the moving part and a corresponding stretching of the drive belt occur, the tooth flanks of the pinion and of the rack are supported against each other and in this manner prevent tearing or overloading of the drive belt.
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: November 3, 1998
    Assignee: Carl-Zeiss-Stiftung
    Inventors: Hans Brinkmann, Walter Geis
  • Patent number: 5828492
    Abstract: In a grating structure for use in a Fourier spectrometer with a series of raised and recessed surfaces of optical quality, a plurality of binary lamellar gratings are provided which have distinct height differences and are arranged on different surface areas to provide a suitable diffractive-optical element.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: October 27, 1998
    Assignee: Forschungszentrum Karlsruhe GmbH
    Inventors: Herbert Moser, Karl-Dieter Moller
  • Patent number: 5828491
    Abstract: An advanced design for a phase plate enables the distribution of spots in arbitrarily shaped patterns with very high uniformity and with a continuously or near-continuously varying phase pattern. A continuous phase pattern eliminates large phase jumps typically expected in a grating that provides arbitrary shapes. Large phase jumps increase scattered light outside of the desired pattern, reduce efficiency and can make the grating difficult to manufacture. When manufacturing capabilities preclude producing a fully continuous grating, the present design can be easily adapted to minimize manufacturing errors and maintain high efficiencies. This continuous grating is significantly more efficient than previously described Dammann gratings, offers much more flexibility in generating spot patterns and is easier to manufacture and replicate than a multi-level phase grating.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: October 27, 1998
    Assignee: The Regents of the University of California
    Inventors: Bill Neuman, John Honig, Lloyd Hackel, C. Brent Dane, Shamasundar Dixit
  • Patent number: 5828471
    Abstract: An illumination system includes a polarization selective holographic element, which includes at least one optically anisotropic material, arranged to separate light of a first polarization type from light of a second polarization type, and converting section for converting light of at least one of the first and second polarization types to light of a common polarization type. Where the polarization selective holographic element separates two orthogonal components of plane polarized light from one another, the converting section can include a polarization rotator, for example a half wave plate, or alternatively a quarter wave plate and a reflector arranged to reflect light back through the quarter wave plate. Where the polarization selective holographic element separates opposite handed components of circularly polarized light, the converting section can include a reflector.
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: October 27, 1998
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Gillian Margaret Davis, Kathryn Walsh, Paul May
  • Patent number: 5828493
    Abstract: A reflector formed on a base with a thick (0.5 to 2.0 microns) layer of non-porous oxide underlying an aluminum vacuum deposited layer which supports a pair of quarter wavelength reflectance-enhancing layers.
    Type: Grant
    Filed: September 17, 1996
    Date of Patent: October 27, 1998
    Assignee: Dielectric Coating Industries
    Inventors: Carmen B. Bischer, Jr., Edward A. Small, Jr.
  • Patent number: 5828487
    Abstract: A stereoscopic viewing system provides stereoscopic viewing using a two dimensional lens system and without having to have two cameras. The system may be used over a wide range of frequencies, in fact all frequencies that can be used for producing or reproducing an image. The viewing system has an opaque leaf positioned between the two dimensional lens system and a camera in a single image path, the opaque leaf is movable laterally in the single image path from a left position to a right position to provide a left image perspective and a right image perspective of the image path to the camera. A switching device moves the opaque leaf between the two positions and retains the leaf stationary in each position for a sufficient time for the camera to view each image perspective.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: October 27, 1998
    Assignee: International Telepresence (Canada) Inc.
    Inventors: Anthony B. Greening, Thomas N. Mitchell
  • Patent number: 5825548
    Abstract: A color filter plate includes a continuously-variable dichroic filter coating constituting a variable band-pass or variable band-reject filter having a spatially-modulated variable-density pattern formed in the coating, and provides continuously-variable hue and saturation characteristics along separate gradient axes. A color filter assembly includes a variable band-pass and a variable band-reject filter mounted in a co-planar arrangement, providing a continuous range of color filtration for spectral and non-spectral colors. A color filter mechanism includes a color filter assembly having either a rectangular arrangement or a circular arrangement of co-planar, continuously-variable band-pass and band-reject filters mounted in a motorized carriage. One mechanism provides two-axis translation of the rectangular color filter assembly while another mechanism provides translation and rotation of the circular color filter assembly.
    Type: Grant
    Filed: September 11, 1997
    Date of Patent: October 20, 1998
    Assignee: Vari-Lite, Inc.
    Inventors: James M. Bornhorst, Richard W. Hutton
  • Patent number: 5825539
    Abstract: A multi-eye type image display apparatus comprises a right-eye image displaying device for emitting light to display an image for the right eye, a left-eye image displaying device for emitting light to display an image for the left eye, an optical device for guiding a light beam from the right-eye image displaying device to the pupil of the right eye of an observer and guiding a light beam from the left-eye image displaying device to the pupil of the left eye of the observer, so that the observer can fuse virtual images of the images with each other, and an adjusting device for adjusting a characteristic of each virtual image in a region including a boundary where the virtual image for the right eye and the virtual image for the left eye overlap.
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: October 20, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiroaki Hoshi