Patents by Inventor Richard L. Kendrick

Richard L. Kendrick 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).

  • Publication number: 20220255219
    Abstract: A method includes capturing measurements of optical signals transmitted from an optical phased array that includes (i) multiple array elements each having an antenna element and a phase modulator and (ii) an additional antenna element spaced apart from the array elements. The method also includes performing digital holography using the measurements to identify relative phases of the array elements with respect to a phase of the additional antenna element. In addition, the method includes modifying phases provided by at least some of the phase modulators of at least some of the array elements to bring the array elements more closely into phase with one another.
    Type: Application
    Filed: February 11, 2021
    Publication date: August 11, 2022
    Inventors: Richard L. Kendrick, Joseph Marron
  • Publication number: 20220229343
    Abstract: A method includes illuminating a photonic integrated circuit (PIC) of a transmit aperture of a laser communication terminal and a PIC of a receive aperture of the laser communication terminal with multi-wavelength light, where each PIC includes multiple antenna elements forming an optical phased array (OPA). The method also includes determining light intensities of different wavelengths of the multi-wavelength light after the multi-wavelength light has passed through each PIC. The method further includes estimating phases of light associated with the antenna elements based on variations in the light intensities. In addition, the method includes adjusting one or more phase shifters of at least one of the PICs based on the estimated phases of light.
    Type: Application
    Filed: January 15, 2021
    Publication date: July 21, 2022
    Inventors: Richard L. Kendrick, Joseph Marron
  • Patent number: 11035985
    Abstract: A dual-lenslet array photonic integrated circuit (PIC) imager includes a PIC and top and bottom substrate spacers. A first optical prism couples a first lenslet array to a first-side edge of the PIC. A second optical prism couples a second lenslet array to a second-side edge of the PIC. Lenslets of the first lenslet array and respective lenslets of the second lenslet array are coupled to respective waveguides embedded in the in the PIC.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: June 15, 2021
    Assignee: LOCKHEED MARTIN CORPORATION
    Inventors: Guy Chriqui, Chad E. Ogden, Richard L. Kendrick, Katherine Emily Badham
  • Patent number: 10914900
    Abstract: A photonic integrated circuit (PIC) imager includes a substrate, and a number of PIC imager units disposed in an arbitrary configuration on the substrate. Each PIC imager unit includes a PIC coupled to an optical connector, and a number of lenslets configured as a linear lenslet array and optically coupled to an edge of the PIC. Pairs of lenslets of the linear lenslet array are optically coupled to respective waveguides embedded in the PIC.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: February 9, 2021
    Assignee: Lockheed Martin Corporation
    Inventors: Richard L. Kendrick, Chad E. Ogden, Guy Chriqui, Alan L. Duncan
  • Patent number: 9754985
    Abstract: An imaging system can include of a plurality of pairs of lenslets and a respective plurality of two-dimensional arrays of photonic waveguides arranged in a respective plurality of photonic integrated circuits. Each waveguide can collect light in an airy-disk-size bin to cover a full field of view of the lenslet. Light from each pair of respective waveguides from each pair of lenslets can be demultiplexed into wavelength bins and combined with appropriate phase shifts to enable a measurement of the complex visibility. The complex visibilities from all of the measurements then can be processed to form an image.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: September 5, 2017
    Assignee: LOCKHEED MARTIN CORPORATION
    Inventors: Alan L. Duncan, Richard L. Kendrick, David M. Stubbs
  • Patent number: 8994784
    Abstract: A method and apparatus of correcting image distortion using an orthogonal transfer charge-coupled device array is provided. A wide field of view line-scan remote sensing system includes an array of orthogonal transfer charge-coupled devices (OTCCDs) configured to record image data of an optical image of a moving object received from a lens. Further, the system includes a processor coupled to the array of OTCCDS, in which the processor is configured to scan the optical image across the array of OTCCDs; and shift pixel charges along a first axis and a second axis that substantially matches an actual image motion of the moving object while the optical image is being scanned in order to reduce an amount of image distortion across the array of OTCCDs.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: March 31, 2015
    Assignee: Lockheed Martin Corporation
    Inventors: Richard L. Kendrick, Samuel T. Thurman
  • Publication number: 20120162359
    Abstract: A method and apparatus of correcting image distortion using an orthogonal transfer charge-coupled device array is provided. A wide field of view line-scan remote sensing system includes an array of orthogonal transfer charge-coupled devices (OTCCDs) configured to record image data of an optical image of a moving object received from a lens. Further, the system includes a processor coupled to the array of OTCCDS, in which the processor is configured to scan the optical image across the array of OTCCDs; and shift pixel charges along a first axis and a second axis that substantially matches an actual image motion of the moving object while the optical image is being scanned in order to reduce an amount of image distortion across the array of OTCCDs.
    Type: Application
    Filed: December 23, 2011
    Publication date: June 28, 2012
    Applicant: Lockheed Martin Corporation
    Inventors: Richard L. Kendrick, Samuel T. Thurman
  • Patent number: 8068235
    Abstract: Systems and methods are provided for multi-function coherent imaging comprising directing a first coherent radiation beam and a second coherent radiation beam towards a detector, where the second coherent radiation beam is spatially offset, angularly offset, or spatially and angularly offset from the first coherent radiation beam. A portion of the first coherent radiation beam and a portion of the second coherent radiation beam may be combined to form a composite beam. An object may be radiated with the composite beam. A first intensity pattern may be formed by interfering with return radiation from the radiated object with the first coherent radiation beam and a second intensity pattern is formed with the return radiation from the radiated object and the second coherent radiation beam. A detector may simultaneously record a superposition of the first intensity pattern and the second intensity pattern.
    Type: Grant
    Filed: July 24, 2007
    Date of Patent: November 29, 2011
    Assignee: Lockheed Martin Corporation
    Inventors: Joseph C. Marron, Richard L. Kendrick
  • Patent number: 7973937
    Abstract: A method for reducing noise in a multi-aperture imaging system is provided. Each sub-collector of the system, at least one of which has an adjustable optical path length, collects a portion of a wavefront. The adjustable optical path length is varied to each of a set of predetermined lengths to generate interference patterns. Each interference pattern is recorded at an image plane of the system to generate a recorded interference pattern made up of pixels. Pixel intensity data sets are generated, each of which includes a pixel intensity level from a corresponding one of the pixels from each recorded interference pattern. Each pixel intensity data set is Fourier transformed, and in each Fourier transformed data set, spatial frequencies having power values above a predetermined level are identified.
    Type: Grant
    Filed: August 18, 2006
    Date of Patent: July 5, 2011
    Assignee: Lockheed Martin Corporation
    Inventors: Richard L. Kendrick, Eric H. Smith
  • Patent number: 7708019
    Abstract: A spinal restraint device includes a body member with a head support portion, a neck support portion, and a back support portion. Left and right body wrap portions extend from the back support portion, and left and right head wrap portions extend from the neck support portion, and these portions respectively wrap around an individual's torso and head and are secured to each other to secure the torso and head against movement. A chest flap section is provided in the left and right body wrap portions for folding away from the individual's chest, for comfort or for better access to the chest area. Declaration buckles and straps are also provided for securing the spinal restraint device (and individual) to a support board or stretcher. Other benefits are realized from the positioning of securing straps and leg straps and the dimensions of the body wrap portions.
    Type: Grant
    Filed: June 9, 2006
    Date of Patent: May 4, 2010
    Assignee: Kendrick EMS, Inc.
    Inventor: Richard L. Kendrick
  • Patent number: 7641624
    Abstract: A femur traction device includes a brace adapted to be secured to a patient's leg, with one end secured above a break in the leg and a hitch end extending below the foot and providing a hitch for a tensioning harness. The tensioning harness is secured between the hitch and the patient's ankle, and straps of the harness may be lengthened or shortened to increase or decrease tension on the leg. The tensioning harness advantageously does not rely on hook-and-loop type fastening means, is color coded to facilitate proper use, and stores in a pouch that forms part of and is secured to the remainder of the tensioning harness.
    Type: Grant
    Filed: June 9, 2006
    Date of Patent: January 5, 2010
    Assignee: Kendrick EMS, Inc.
    Inventor: Richard L. Kendrick
  • Patent number: 7631839
    Abstract: A multiple instrument distributed aperture sensor (“MIDAS”) science payload system mounted on a spacecraft, including a spacecraft interface ring affixing the MIDAS science payload system to the spacecraft, and a multiple telescope array (“MTA”) further including a mechanical subsystem further including an optical bench, an optical subsystem mounted upon the mechanical subsystem collecting light and merging the light into a passive, actively-sensed or hyperspectral image, and a laser subsystem providing laser illumination for collecting active remote sensing data. The MIDAS science payload system also includes a hexapod in physical communication with and between the spacecraft interface ring and the mechanical subsystem.
    Type: Grant
    Filed: August 17, 2005
    Date of Patent: December 15, 2009
    Assignee: Lockheed Martin Corporation
    Inventors: Alan L. Duncan, Robert D. Sigler, David M. Stubbs, Eric H. Smith, Richard L. Kendrick, Joseph T. Pitman
  • Patent number: 7580586
    Abstract: A method of restoring low spatial frequency spectral information to an image using a Fizeau Fourier transform spectrometer (“FFTS”) system is provided. Portions of a wavefront collected by the FFTS are interfered. The interference patterns are Fourier transformed to generate spectral images. A region of the image is identified, for which spectral information is predetermined. Object estimates are generated, each of which corresponds to a spectral image. Each object estimate is iteratively adjusted applying a system spectral optical transfer function (“SOTF”) to it and modifying it until a match is made with the corresponding spectral image. Each adjusted object estimate is then iteratively restored by applying a system optical transfer function (“OTF”) to it and then applying a DC bias to it until a match is made between the identified region in the sum of the object estimates and the identified region of a measured panchromatic object image.
    Type: Grant
    Filed: April 18, 2006
    Date of Patent: August 25, 2009
    Assignee: Lockheed Martin Corporation
    Inventors: Eric H. Smith, Richard L. Kendrick
  • Patent number: 7436518
    Abstract: A Fourier Transform Spectrometer (“FTS”) system includes a Fizeau FTS having a plurality of sub-collecting elements, adjacent ones of which are separated by a gap distance, and at least one of which has an adjustable optical path. The FTS system further includes a Michelson FTS having an adjustable optical path. The FTS system further includes one or more processors configured to select spectral data collected by the Fizeau FTS corresponding to spatial frequencies for which the Fizeau FTS has a modulation transfer function (“MTF”) value above a first threshold level, to select spectral data collected by the Michelson FTS corresponding to spatial frequencies for which the Michelson FTS has a MTF value above a second threshold level, and to combine the selected spectral data from the Fizeau FTS with the selected spectral data from the Michelson FTS.
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: October 14, 2008
    Assignee: Lockheed Martin Corporation
    Inventors: Eric H. Smith, Richard L. Kendrick
  • Publication number: 20080149113
    Abstract: The invention is a support device that cradles and supports the head of an individual while distributing pressure acting on the head. The invention may be used in conjunction with a spine board or other cervical immobilization device to maintain the cervical spine in neutral alignment and assist in immobilization of the individual.
    Type: Application
    Filed: December 22, 2006
    Publication date: June 26, 2008
    Inventor: Richard L. Kendrick
  • Patent number: 7391519
    Abstract: Detecting the presence of a target material in a scene by using a multi-aperture interferometer system having a plurality of apertures at least one of which has an adjustable optical path length, by adjusting the aperture(s) to obtain a predetermined optical path length difference among the apertures, the predetermined optical path length difference being based on a source laser wavelength and a target material wavelength, illuminating the scene with the source laser, capturing a spectral data set corresponding to an interference pattern generated in the multi-aperture interferometer system for an illuminated point source in the scene, the spectral data set containing spatially distributed spectral data, and determining whether the target material is present at the illuminated point source based on a presence of spectral data in at least one side lobe of the spectral data set.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: June 24, 2008
    Assignee: Lockheed Martin Corporation
    Inventors: Richard L. Kendrick, Eric H. Smith
  • Publication number: 20070287943
    Abstract: A spinal restraint device includes a body member with a head support portion, a neck support portion, and a back support portion. Left and right body wrap portions extend from the back support portion, and left and right head wrap portions extend from the neck support portion, and these portions respectively wrap around an individual's torso and head and are secured to each other to secure the torso and head against movement. A chest flap section is provided in the left and right body wrap portions for folding away from the individual's chest, for comfort or for better access to the chest area. Declaration buckles and straps are also provided for securing the spinal restraint device (and individual) to a support board or stretcher. Other benefits are realized from the positioning of securing straps and leg straps and the dimensions of the body wrap portions.
    Type: Application
    Filed: June 9, 2006
    Publication date: December 13, 2007
    Inventor: Richard L. Kendrick
  • Publication number: 20070287946
    Abstract: A femur traction device includes a brace adapted to be secured to a patient's leg, with one end secured above a break in the leg and a hitch end extending below the foot and providing a hitch for a tensioning harness. The tensioning harness is secured between the hitch and the patient's ankle, and straps of the harness may be lengthened or shortened to increase or decrease tension on the leg. The tensioning harness advantageously does not rely on hook-and-loop type fastening means, is color coded to facilitate proper use, and stores in a pouch that forms part of and is secured to the remainder of the tensioning harness.
    Type: Application
    Filed: June 9, 2006
    Publication date: December 13, 2007
    Inventor: Richard L. Kendrick
  • Patent number: 6882427
    Abstract: Embodiments of the present invention are directed to a nuller that is used to significantly reduce or eliminate a monochromatic radiation signal within a polychromatic object field. In one embodiment, a method of nulling a coherent light from a light beam having the coherent light and an incoherent light comprises collimating the light beam having the coherent light and the incoherent light, and destructively interfering the coherent light to null the coherent light with no destructive interference of the incoherent light so as to project the incoherent light without the coherent light.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: April 19, 2005
    Assignee: Lockheed Martin Corporation
    Inventors: Richard L. Kendrick, Eric H. Smith
  • Patent number: 5610707
    Abstract: A wavefront sensor for use in a staring imaging system for generating focused and defocused images of an object scene that is being imaged by the imaging system from a single input optical beam impinged thereon. The wavefront sensor includes a beamsplitter for splitting an optical input beam into identical first and second half beam portions and for focusing the first and second half beam portions onto respective first and second focal planes. A phase plate is interposed between the beamsplitter and the second focal plane for inducing a known focus error in the second half beam portion. A photodetector is also provided and is effective to form a best focused image and a slightly out of focus image at the first and second focal planes, respectively. The focused and defocused images are combinable using phase diversity techniques to estimate wavefront aberrations present in the imaging system.
    Type: Grant
    Filed: July 7, 1995
    Date of Patent: March 11, 1997
    Assignee: Lockheed Missiles & Space Co., Inc.
    Inventors: Alan L. Duncan, Daniel S. Acton, Richard L. Kendrick