Patents by Inventor Murty V. Mantravadi

Murty V. Mantravadi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Strapdown stellar sensor and holographic multiple field of view telescope therefor
    Patent number: 5206499
    Abstract: A star tracker for generating positional information for a vehicle includes a holographic telescope (150) having one or more fields of view for imaging stellar objects. The telescope includes a plurality of radiation detectors (100) and an input aperture comprised of a primary holographic optical element (HOE) (134). The primary HOE provides one or more wavefronts to one or more secondary HOEs (136), each of which applies a chromatic correction so as to correct for a chromatic aberration induced by the primary HOE. A single or multiple field of view Schmidt telescope embodiment is also disclosed having one or more aspheric corrector plate HOEs and one or more associated concave spherical reflectors.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: April 27, 1993
    Assignee: Northrop Corporation
    Inventors: Murty V. Mantravadi, Susan M. Raffensperger, Phillip Simpson, Douglas R. Jungwirth, Seymour Levine
  • One step rainbow holography
    Patent number: 5121227
    Abstract: Improved optical holographic apparatuses are disclosed for making white light viewable rainbow holograms in one step utilizing concave mirror optics. On-axis and off-axis configurations are presented for holography of real objects and for reduced image holography of a real image projection from a laser transmission hologram. An optical apparatus and curved recording devices are devised to reduce and/or eliminate certain aberrations introduced by the concave mirror. To yield a wide holographic field of view at low cost, small diameter mirrors are employed in two alternative devices for replacing a single concave mirror in the various embodiments. Two methods are then presented to obtain reduced image size one-step rainbow holograms from a full size object or holographic image.
    Type: Grant
    Filed: January 5, 1990
    Date of Patent: June 9, 1992
    Inventors: Gary R. Fisher, Murty V. Mantravadi
  • One step rainbow holography
    Patent number: 4925260
    Abstract: Improved optical holographic apparatuses are disclosed for making white light viewable rainbow holograms in one step utilizing concave mirror optics. On-axis and off-axis configurations are presented for holography of real objects and for reduced image holography of a real image projection from a laser transmission hologram. An optical apparatus and curved recording device are devised to reduce and/or eliminate certain aberrations introudced by the concave mirror. To yield a wide holographic field of view at low cost, small diameter mirrors are employed in two alternative devices for replacing a single concave mirror in the various embodiments. Two methods are then presented to obtain reduced image size one-step rainbow holograms from a full size object or holographic image.
    Type: Grant
    Filed: November 18, 1987
    Date of Patent: May 15, 1990
    Inventors: Gary R. Fisher, Murty V. Mantravadi