Patents Represented by Attorney Edward S. Roman

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  • Electronic image sensing and printing apparatus
    Patent number: 4564853
    Abstract: An electronic image printing apparatus of the type utilizing a laser addressed liquid crystal light valve includes a single set of XY scanning galvanometer mirrors which operate initially to line scan an original photograph in order to derive electronic image data therefrom. The XY scanning galvanometer mirrors subsequently operate to addressably line scan a laser beam which is modulated in response to the electronic image data, across the surface of the liquid crystal light valve and to thereafter reflect a beam of incoherent light from a projection lamp for transmission through the liquid crystal light valve to expose a photosensitive material and thereby reproduce the image previously line scanned from the original photograph.
    Type: Grant
    Filed: February 8, 1985
    Date of Patent: January 14, 1986
    Assignee: Polaroid Corporation
    Inventor: Richard G. Egan
  • Color laser printer with improved efficiency
    Patent number: 4562462
    Abstract: A multispectral laser printing system in which beam splitting and beam recombination are accomplished by light refracting optical elements instead of beam splitters in order to materially improve efficiency. In one embodiment such beam splitting and recombination can be achieved by a single light refracting optical element such as a prism.
    Type: Grant
    Filed: September 2, 1983
    Date of Patent: December 31, 1985
    Assignee: Polaroid Corporation
    Inventor: Richard G. Egan
  • Selective photoresponsive sensing circuit
    Patent number: 4561753
    Abstract: A photosensor arrangement for providing an exposure influencing control signal in a photographic camera apparatus includes a photosensor array wherein the exposure influencing control signal comprises an average of the output signals from all the photosensors in the array excepting the output signals from those photosensors in the array which detect the highest and lowest scene light intensities.
    Type: Grant
    Filed: March 13, 1985
    Date of Patent: December 31, 1985
    Assignee: Polaroid Corporation
    Inventors: William T. Plummer, Philip G. Baker
  • Photosensor arrangement for encoding lens and shutter blade position
    Patent number: 4557573
    Abstract: A photographic exposure control system includes a dual purpose light sensing arrangement comprising a single photocell and light emitting diode pair which provide control signals indicative of both the focal position of a variable focus lens as well as the position in which the shutter blades first allow the transmission of scene light to the focal plane of the camera.
    Type: Grant
    Filed: March 28, 1984
    Date of Patent: December 10, 1985
    Assignee: Polaroid Corporation
    Inventors: Bruce K. Johnson, George D. Whiteside
  • Film processing apparatus including a vacuum pickup head for a film processing fluid container
    Patent number: 4556306
    Abstract: Apparatus are provided for automatically retrieving a rupturable film processing fluid container from a supply tray and thereafter depositing the retrieved container on one of a pair of converging positive and negative film sheets prior to the processing of the film sheets between a pair of pressure-applying rollers operable to rupture the fluid container and spread the processing fluid between the positive and negative film sheets.
    Type: Grant
    Filed: October 25, 1984
    Date of Patent: December 3, 1985
    Assignee: Polaroid Corporation
    Inventors: Duncan C. Sorli, John H. Keightley
  • Electronic imaging camera with microchannel plate
    Patent number: 4555731
    Abstract: Imaging apparatus for an electronic imaging camera responds to a scene image by converting photons into electrons representative of the scene image. A microchannel electron multiplier, including a microchannel plate, having an output surface at its output side is coupled to receive the electrons representative of the scene image and operates to intensify the electron representation of the scene image. A charge transfer device in the form of a charge coupled device (CCD), directly coupled to the output surface responds to the electron output to produce an electric signal representation of the scene image received by the camera. The electric signal representation is read out of the CCD by clock voltages and may have the form of a serial picture sample output. A signal processor may be provided to develop a video output from the sample output.
    Type: Grant
    Filed: April 30, 1984
    Date of Patent: November 26, 1985
    Assignee: Polaroid Corporation
    Inventor: Michael Zinchuk
  • Reproducible image and information bearing record
    Patent number: 4554591
    Abstract: A reproducible image and information bearing medium, termed herein as a photorecord, includes a visible image bearing media, such as a photographic print, negative, transparency or the like, and an attached information storage medium. The information storage medium such as a magnetic or optical stripe, is encoded with machine readable information that corresponds to the associated visual image. An original photorecord is manufactured by affixing a blank magnetic stripe to the visual image bearing medium optically reading the visual image, converting the so read optical information to an electrical signal, and recording this signal as machine readable information on the magnetic stripe.
    Type: Grant
    Filed: September 19, 1983
    Date of Patent: November 19, 1985
    Assignee: Polaroid Corporation
    Inventor: Richard C. Kee
  • Photographic camera with electronic image enhancement
    Patent number: 4541704
    Abstract: A photographic camera apparatus with electronic image enhancement operates to control the exposure of a photosensitive material to scene light received directly from a scene to be photographed in a manner whereby the photosensitive material is exposed to an extent less than a selected optimum exposure value and the scene light is simultaneously electronically sensed to provide electrical signal information corresponding thereto to control an additional electronic exposure of the photosensitive material so that in conjunction with the direct exposure to scene light there is substantially provided the selected optimum exposure value.
    Type: Grant
    Filed: September 10, 1984
    Date of Patent: September 17, 1985
    Assignee: Polaroid Corporation
    Inventor: William T. Freeman
  • Electronic imaging camera
    Patent number: 4541010
    Abstract: An electronic camera for providing a photographic quality still print includes a viewfinder display in which the scene to be photographed may be viewed for composition at a standard television transfer frame rate without the provision of additional buffer memories. The electronic camera comprises an integral charge coupled device (CCD) sensing configuration which operates to sense the image to be recorded in a preview mode of operation and to provide a real time digital buffer memory during a succeeding review mode of operation in order to display the recorded scene in the viewfinder at a standard television frame transfer rate.
    Type: Grant
    Filed: June 17, 1983
    Date of Patent: September 10, 1985
    Assignee: Polaroid Corporation
    Inventor: Lawrence E. Alston
  • Method and apparatus for colored computer graphic photography
    Patent number: 4536848
    Abstract: Method and apparatus for making and photographing computer graphic colored images by defining each computer graphic colored image as a plurality of constant color pixel groups, assigning one of a preselected number of colors to each constant color pixel group, and exposing a photosensitive material to each constant color pixel group displayed in a predetermined ordered sequence and color.
    Type: Grant
    Filed: April 2, 1984
    Date of Patent: August 20, 1985
    Assignee: Polaroid Corporation
    Inventors: Alice M. d'Entremont, William T. Freeman
  • Control circuit for electronic flash
    Patent number: 4531078
    Abstract: A control circuit for timing the duration of a flash of artificial illumination from an electronic flash maintains a substantially uniform amount of artificial illumination regardless of the ambient scene light intensity by detecting the ambient scene light intensity up to the instant that the flash is fired and thereafter subtracting the ambient scene light intensity so detected immediately prior to the flash being fired from the ambient and artificial scene light intensity detected during the flash of artificial illumination.
    Type: Grant
    Filed: October 27, 1983
    Date of Patent: July 23, 1985
    Assignee: Polaroid Corporation
    Inventors: Joseph M. Canter, William A. Shelton
  • Exposure control system for photographic camera apparatus
    Patent number: 4527888
    Abstract: An exposure control system for a photographic camera apparatus includes a single latch mechanism for latching a shutter blade mechanism of the type which is resiliently biased to move toward its scene light admitting position from its scene light blocking position between photographic exposure cycles and for latching an automatically focused lens arrangement at its appropriate focal position during a photographic exposure cycle.
    Type: Grant
    Filed: January 23, 1984
    Date of Patent: July 9, 1985
    Assignee: Polaroid Corporation
    Inventors: George D. Whiteside, Laura E. Keith, Donato F. Pizzuti
  • Parallel LED exposure control system
    Patent number: 4525729
    Abstract: An electronic imaging system includes a linear LED array for recording on a photosensitive medium an image defined by electronic signal information in binary word format by simultaneously controlling the energization of all the LED's at a constant energy level in a series of intervals, each of which is timed differently to correspond to a different one of the data bits in the binary words which comprise the image defining electronic signal information. Each LED is energized during each interval as a direct function of the state of the data bit corresponding to that interval for that LED.
    Type: Grant
    Filed: April 4, 1983
    Date of Patent: June 25, 1985
    Assignee: Polaroid Corporation
    Inventors: Martin A. Agulnek, Joseph M. Canter, Michael L. Reisch
  • Processor for enhancing video signals for photographic reproduction
    Patent number: 4520403
    Abstract: A signal processor for selective use with a conventional color television receiver for modifying the color image displayed on the screen of the receiver in order to enable a color photograph to be made by directly exposing a photosensitive material to the modified color image displayed on the screen of the receiver such that the photographic image is of an appearance substantially corresponding to the appearance of the image otherwise displayed on the screen of the receiver when the signal processor is not in use.
    Type: Grant
    Filed: June 22, 1984
    Date of Patent: May 28, 1985
    Assignee: Polaroid Corporation
    Inventors: James L. Burkhardt, John J. McCann
  • Lens drive for auto focus camera
    Patent number: 4509840
    Abstract: A lens drive mechanism for an auto focus camera transmits a substantially uniform driving force to rotate a lens mechanism at a uniform rate from a drive member interconnecting a pair of shutter blade elements regardless of variations in the output of the camera battery supply which operate to impart variations in the speed at which the shutter blade connecting member is driven.
    Type: Grant
    Filed: February 21, 1984
    Date of Patent: April 9, 1985
    Assignee: Polaroid Corporation
    Inventors: Bruce K. Johnson, George D. Whiteside
  • Two zone infrared ranging system
    Patent number: 4502773
    Abstract: An economical dual zone active rangefinding system for a photographic camera operates upon the principle of triangulation without lateral displacement of either the radiation source or detector to provide an output signal indicative of whether the subject in the scene to be photographed is located in a select distance range from the photographic camera.
    Type: Grant
    Filed: January 31, 1983
    Date of Patent: March 5, 1985
    Assignee: Polaroid Corporation
    Inventors: John P. Gaewsky, Joseph E. Murray, Jr.
  • Method and apparatus for making achromatic holograms
    Patent number: 4498729
    Abstract: A method of producing achromatic holographic images of an object, and a diffraction grating useful for making an achromatic hologram. The method comprises the steps of making a monochromatic hologram on a first photographic plate, making a diffraction grating by exposing a second photographic plate to a series of colinear point sources of mutually coherent monochromatic light, developing and bleaching the exposed plate to produce the diffraction grating, making a second hologram by exposing a third photographic plate to an image from a narrow elongated strip of the first hologram with the diffraction grating in the optical path, and making an achromatic hologram by holographically recording the image produced by illuminating the second hologram with monochromatic light on a fourth photographic plate.
    Type: Grant
    Filed: August 13, 1979
    Date of Patent: February 12, 1985
    Assignee: Polaroid Corporation
    Inventor: Stephen A. Benton
  • Laser printing system with developable helicoid reflector
    Patent number: 4494821
    Abstract: Line scanning apparatus are especially compensated to limit beam divergence in one direction by embodying a specularly reflective developable helicoid. Beam divergence in the direction orthogonal to the aforementioned one direction is masked by a narrow slit extending longitudinally in the direction of the longitudinal center axis of the helicoid.
    Type: Grant
    Filed: March 7, 1983
    Date of Patent: January 22, 1985
    Assignee: Polaroid Corporation
    Inventors: John R. Lewis, Andrew McCurdy, Arthur D. Gaudet
  • Processor for enhancing video signals for photographic reproduction
    Patent number: 4492987
    Abstract: A signal processor for selective use with a conventional color television receiver for modifying the color image displayed on the screen of the receiver in order to enable a color photograph to be made by directly exposing a photosensitive material to the modified color image displayed on the screen of the receiver such that the photographic image is of an appearance substantially corresponding to the appearance of the image otherwise displayed on the screen of the receiver when the signal processor is not in use.
    Type: Grant
    Filed: March 22, 1982
    Date of Patent: January 8, 1985
    Assignee: Polaroid Corporation
    Inventors: James L. Burkhardt, John J. McCann
  • Computer graphic system with foreground/background discrimination
    Patent number: 4488244
    Abstract: Apparatus and method for making and photographing computer graphic colored images by defining each computer graphic colored image as a plurality of constant color pixel groups, assigning one of a preselected number of colors to each constant color pixel group, assigning one of a preselected number of foreground/background numbers to each constant color pixel group so as to designate its location with respect to the other constant color pixel groups, and exposing a photosensitive material to each constant color pixel group displayed in a predetermined ordered sequence and color so as to maintain the predetermined ordered foreground to background relationship between the constant color pixel groups in the exposure of the photosensitive material to the overlapping areas between the constant color pixel groups.
    Type: Grant
    Filed: June 7, 1982
    Date of Patent: December 11, 1984
    Assignee: Polaroid Corporation
    Inventor: William T. Freeman