Patents Assigned to Evans & Sutherland Computer Corporation
  • Patent number: 7193765
    Abstract: The invention provides a system and method for reducing laser speckle and interference patterns in a laser projector display when using a laser projector having a spatial light modulator (SLM) with a defined pixel rate. The method can include the operation of polarizing a laser output of a continuous wave laser such that the laser output is s-polarized with respect to a beam combiner. The s-polarized laser output can be divided into a first laser beam and a second laser beam. A phase of the second laser beam can be modulated with an amplitude sufficient to create a phase delay of approximately half a wavelength of the laser output and at a frequency at least twice that of the SLM's pixel rate.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: March 20, 2007
    Assignee: Evans & Sutherland Computer Corporation
    Inventors: Robert R. Christensen, Forrest L. Williams, Allen H. Tanner
  • Publication number: 20060284890
    Abstract: A system and method is provided for combining independent scene layers to form computer generated environments. The method includes the operation of constructing a terrain layer using stored terrain data. Another operation is generating a feature layer using feature layer data that is stored separately from the stored terrain data. The feature layer and the terrain layer can then be combined to form a composite scene.
    Type: Application
    Filed: August 16, 2006
    Publication date: December 21, 2006
    Applicant: Evans & Sutherland Computer Corporation
    Inventors: Michael Cosman, Robert Dawson, Heber Bennion
  • Publication number: 20060284889
    Abstract: A system and method is provided for combining independent scene layers to form computer generated environments. The method includes the operation of constructing a terrain layer using stored terrain data. Another operation is generating a feature layer using feature layer data that is stored separately from the stored terrain data. The feature layer and the terrain layer can then be combined to form a composite scene.
    Type: Application
    Filed: August 16, 2006
    Publication date: December 21, 2006
    Applicant: Evans & Sutherland Computer Corporation
    Inventors: Michael Cosman, Robert Dawson, Heber Bennion
  • Patent number: 7133583
    Abstract: A tunable fiber optic component providing environmental isolation, thermal tuning, and mechanical tuning and a method of tuning a fiber optic component using application of substantially simultaneous varying of temperature and mechanical strain is disclosed. A method of using a tunable fiber optic component, for example, a distributed feedback fiber laser, to compensate variations in an optical system, and a method of making a tunable fiber optic component are also disclosed.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: November 7, 2006
    Assignee: Evans & Sutherland Computer Corporation
    Inventors: David Marceau, Dennis F. Elkins, Forrest L. Williams, Allen H. Tanner
  • Patent number: 7113320
    Abstract: A communications transmitter is disclosed that utilizes a grating light valve (GLV) to impose information on an optical signal. The communications transmitter further includes at least one laser light source, a frequency dispersing device, an electrostatic modulator that serves as a GLV, and at least one data input source. The laser light source is configured to produce a light beam having a specific optical bandwidth and the frequency dispersing device is optically coupled to the light source and configured to disperse the light beam to produce a frequency dispersed light. The electrostatic modulator includes an electrostatically responsive reflective ribbon oriented to receive a portion of the frequency dispersed light having a specified bandwidth.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: September 26, 2006
    Assignee: Evans & Sutherland Computer Corporation
    Inventor: Allen H. Tanner
  • Patent number: 7110624
    Abstract: A tunable fiber optic component providing environmental isolation, thermal tuning, and mechanical tuning and a method of tuning a fiber optic component using application of substantially simultaneous varying of temperature and mechanical strain is disclosed. A method of using a tunable fiber optic component, for example, a distributed feedback fiber laser, to compensate variations in an optical system, and a method of making a tunable fiber optic component are also disclosed.
    Type: Grant
    Filed: March 23, 2004
    Date of Patent: September 19, 2006
    Assignee: Evans & Sutherland Computer Corporation
    Inventors: Forrest L. Williams, Allen H. Tanner, David Marceau, Dennis F. Elkins
  • Patent number: 7095423
    Abstract: A system and method is provided for combining independent scene layers to form computer generated environments. The method includes the operation of constructing a terrain layer using stored terrain data. Another operation is generating a feature layer using feature layer data that is stored separately from the stored terrain data. The feature layer and the terrain layer can then be combined to form a composite scene.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: August 22, 2006
    Assignee: Evans & Sutherland Computer Corporation
    Inventors: Michael A. Cosman, Robert C. Dawson, Heber B. Bennion
  • Patent number: 7091980
    Abstract: A method for communicating digital display data and associated auxiliary processing data from a frame buffer to a post processor. The method includes storing the display data and the auxiliary processing data in the frame buffer, forming video scan lines from the frame buffer by handling both the display data and the auxiliary processing data as video data, and transferring the video scan lines over a digital video interface to a post-processor.
    Type: Grant
    Filed: August 28, 2003
    Date of Patent: August 15, 2006
    Assignee: Evans & Sutherland Computer Corporation
    Inventor: Reed P. Tidwell
  • Patent number: 7053913
    Abstract: The invention provides a method for integrating an inset geometry within a background geometry. The method comprises the step of identifying a perimeter of the inset geometry. A further step is extending a skirt, having an outer perimeter and an inner perimeter, from the perimeter of the inset geometry out over the background geometry. An additional step is removing portions of the background geometry that are covered by the inset geometry and skirt. Another step is modifying the skirt so that the outer perimeter of the skirt matches background geometry behavior and the inner perimeter matches inset geometry behavior and a continuous transition exists between the outer perimeter and the inner perimeter.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: May 30, 2006
    Assignee: Evans & Sutherland Computer Corporation
    Inventor: Michael A. Cosman
  • Patent number: 7053911
    Abstract: The invention provides a method for integrating an inset geometry within a background geometry. The method comprises the step of identifying a perimeter of the inset geometry. A further step is extending a skirt, having an outer perimeter and an inner perimeter, from the perimeter of the inset geometry out over the background geometry. An additional step is removing portions of the background geometry that are covered by the inset geometry and skirt. Another step is modifying the skirt so that the outer perimeter of the skirt matches background geometry behavior and the inner perimeter matches inset geometry behavior and a continuous transition exists between the outer perimeter and the inner perimeter.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: May 30, 2006
    Assignee: Evans & Sutherland Computer Corporation
    Inventor: Michael A. Cosman
  • Patent number: 7053912
    Abstract: The invention provides a method for integrating an inset geometry within a background geometry. The method comprises the step of identifying a perimeter of the inset geometry. A further step is extending a skirt, having an outer perimeter and an inner perimeter, from the perimeter of the inset geometry out over the background geometry. An additional step is removing portions of the background geometry that are covered by the inset geometry and skirt. Another step is modifying the skirt so that the outer perimeter of the skirt matches background geometry behavior and the inner perimeter matches inset geometry behavior and a continuous transition exists between the outer perimeter and the inner perimeter.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: May 30, 2006
    Assignee: Evans & Sutherland Computer Corporation
    Inventor: Michael A. Cosman
  • Patent number: 7038735
    Abstract: A method and system are disclosed that correct pixel values for output on a video display utilizing gamma correction. The method provides improved gamma correction by determining a first range of pixel values to be displayed on the video display and then determining a second range of pixel values to be displayed on the same display. Next, the method determines a first level of gamma correction to be provided for the first range of pixel values. This first level of gamma correction is provided at a first level of precision. Next, the method provides a second level of gamma correction to the second range of pixel values at a second level of precision. The second level of precision is different than that of the first level and is typically less than the first level.
    Type: Grant
    Filed: January 4, 2002
    Date of Patent: May 2, 2006
    Assignee: Evans & Sutherland Computer Corporation
    Inventors: Terrence J. Coleman, Kenneth C. George
  • Patent number: 7030883
    Abstract: The invention provides a system and method for filtering a video synchronization signal sent from a remote computer. The method can include the operation of receiving a stream of at least n sync signals from the remote computer and storing the most recently received n sync signals in an array. A further operation can be comparing an n+1 sync signal with each of the n sync signals in the array to form a comparison for each of the n sync signals in the array. Another operation is replacing the oldest of the n sync signals in the array with the n+1 sync signal. A further operation is using the n+1 sync signal to synchronize at least one graphics processing card in each of a plurality of graphics processing computers if the comparisons of the n sync signals in the array are greater on the average than a preset threshold.
    Type: Grant
    Filed: March 10, 2004
    Date of Patent: April 18, 2006
    Assignee: Evans & Sutherland Computer Corporation
    Inventor: Kerry Thompson
  • Patent number: 7012669
    Abstract: A panoramic display system includes a curved projection screen, a panoramic projector, and a substantially conically shaped barrier. The projector is configured to project an image onto the projection screen from a projection point located substantially above the projection screen. The conical barrier has a base disposed toward the bottom of the projection screen, and an apex region disposed toward the projection point. The barrier blocks scattered light from reflecting from portions of the curved screen to other portions thereof.
    Type: Grant
    Filed: March 9, 2004
    Date of Patent: March 14, 2006
    Assignee: Evans & Sutherland Computer Corporation
    Inventors: Harry Streid, Rob Christensen, Allen H. Tanner
  • Patent number: 6956582
    Abstract: A method for is provided for antialiasing a computer graphics image using filtering. The method comprises the steps of defining a plurality of regions having samples from pixels in the computer graphics image, where the regions are associated with a pixel of interest and adjacent pixels to form an antialiasing filter. Another step is determining a contrast for each region. A further step is blending the regions that form the filter based on the contrast for each region.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: October 18, 2005
    Assignee: Evans & Sutherland Computer Corporation
    Inventor: Reed P. Tidwell
  • Patent number: 6943803
    Abstract: A method and apparatus in a preferred embodiment for generating anti-aliased layered fog which is textured manipulated as if in a geocentric virtual environment to thereby show horizon depression at high altitudes. Hardware is provided such that layer model data and texture model data is combined to generate fogged pixel color.
    Type: Grant
    Filed: September 21, 1998
    Date of Patent: September 13, 2005
    Assignee: Evans & Sutherland Computer Corporation
    Inventors: Michael Cosman, W. David Fowler, Eric Despain
  • Patent number: 6897878
    Abstract: A method and apparatus in a preferred embodiment for generating anti-aliased layered fog which is textured manipulated as if in a geocentric virtual environment to thereby show horizon depression at high altitudes. Hardware is provided such that layer model data and texture model data is combined to generate fogged pixel color.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: May 24, 2005
    Assignee: Evans & Sutherland Computer Corporation
    Inventors: Michael Cosman, W. David Fowler
  • Patent number: 6871958
    Abstract: A wide angle display system includes a linear array projector, a curved display surface, and a two-sided, substantially planar scanning mirror. The projector is configured to project an image along an optical axis to the scanning mirror. The scanning mirror continuously rotates about an axis substantially in the plane of the mirror, so as to reflect and scan the image onto the display surface.
    Type: Grant
    Filed: August 18, 2003
    Date of Patent: March 29, 2005
    Assignee: Evans & Sutherland Computer Corporation
    Inventors: Harry Streid, Rob Christensen, Allen H. Tanner
  • Patent number: 6868212
    Abstract: A method for adjusting the wavelength and dominant mode of a laser fiber prior to installation in a laser assembly includes the steps of linearly stretching the laser fiber so as to modify its output wavelength, axially twisting the laser fiber so as to modify its dominant mode, and affixing the laser fiber to a laser assembly in its linearly stretched and axially twisted condition. The laser assembly includes a dynamic tuning mechanism for wavelength adjustment during use. The twisted and stretched fiber has an unadjusted wavelength and dominant mode that are within a selected range before adjustment by the dynamic tuning mechanism.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: March 15, 2005
    Assignee: Evans & Sutherland Computer Corporation
    Inventors: Jeannie DeWitte, Yuri Grapov, David Owen, Dennis Elkins, Aaron McAllister, Allen Tanner
  • Patent number: 6856449
    Abstract: A microscopic optical structure controller for providing singular control of individual microscopic optical structures of a microelectromechanical optical device by a multiplexed stream of individual pixel values generated by a pixel value source. The microscopic optical structure controller includes at least one interconnect coupled to the pixel value source for receiving the multiplexed stream of individual pixel values and at least one mapper communicating with the interconnect for extracting individual pixel values from the multiplexed stream and applying the individual pixel values to one or more individual microscopic optical structures according to a configurable mapping. A method and a driver for providing singular control of individual microscopic optical structures of a microelectromechanical optical device are also disclosed.
    Type: Grant
    Filed: July 10, 2003
    Date of Patent: February 15, 2005
    Assignee: Evans & Sutherland Computer Corporation
    Inventors: Bret D. Winkler, Dennis F. Elkins, Allen H. Tanner