Patents by Inventor Christopher Cotton
Christopher Cotton 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).
-
Patent number: 11137582Abstract: A generally conical element is defined about a vertical axis and having a tip on the vertical axis, and a generally conical odd aspheric contour mirror surface that is defined upward from the tip relative to the vertical axis. A toroidal lens element, disposed to capture light data input of a surrounding scene reflected from the odd aspheric contour mirror surface, has a cross-section shape defined relative to a plane passing through the toroidal lens element and including the vertical axis and is defined by revolving a convex or concave lens surface cross-section shape around the vertical axis, the convex or concave lens surface cross-section shape defined from another axis parallel to the vertical axis but offset, wherein the toroidal lens element cross-sectional shape is constant in rotation about the vertical axis and imparts a toroid shape to the toroidal lens element relative to the vertical axis.Type: GrantFiled: December 23, 2016Date of Patent: October 5, 2021Assignee: SPERE OPTICS COMPANY, LLCInventors: Meyer J. Giordano, Robert S. Englert, Christopher Cotton, W. David Schmidt
-
Publication number: 20210072518Abstract: A generally conical element is defined about a vertical axis and having a tip on the vertical axis, and a generally conical odd aspheric contour mirror surface that is defined upward from the tip relative to the vertical axis. A toroidal lens element, disposed to capture light data input of a surrounding scene reflected from the odd aspheric contour mirror surface, has a cross-section shape defined relative to a plane passing through the toroidal lens element and including the vertical axis and is defined by revolving a convex or concave lens surface cross-section shape around the vertical axis, the convex or concave lens surface cross-section shape defined from another axis parallel to the vertical axis but offset, wherein the toroidal lens element cross-sectional shape is constant in rotation about the vertical axis and imparts a toroid shape to the toroidal lens element relative to the vertical axis.Type: ApplicationFiled: December 23, 2016Publication date: March 11, 2021Inventors: Meyer J. Giordano, Robert S. Englert, Christopher Cotton, W. David Schmidt
-
Patent number: 9559648Abstract: A method of audio signal processing includes receiving a first audio input signal (first input signal) at an input of a first integrating amplifier of a first single-ended (SE) closed loop channel, and second input signal with a polarity reversed relative to the first input signal at an input of a second integrating amplifier configured of a second SE closed loop channel. During audio signal processing a common-mode (CM) reference voltage level applied to a current source coupled to an input of the first and second integrating amplifiers is dynamically changed including whenever a level of the input signals is below a predetermined low level, reducing the CM reference voltage level for implementing low duty cycle (LDC) PWM operation, and whenever the level is above a level that corresponds to an onset of clipping, increasing the CM reference voltage level for at least reducing the clipping to lower crossover distortion.Type: GrantFiled: December 17, 2014Date of Patent: January 31, 2017Assignee: TEXAS INSTRUMENTS INCORPORATEDInventor: Lawrence Christopher Cotton
-
Publication number: 20150222237Abstract: A method of audio signal processing includes receiving a first audio input signal (first input signal) at an input of a first integrating amplifier of a first single-ended (SE) closed loop channel, and second input signal with a polarity reversed relative to the first input signal at an input of a second integrating amplifier configured of a second SE closed loop channel. During audio signal processing a common-mode (CM) reference voltage level applied to a current source coupled to an input of the first and second integrating amplifiers is dynamically changed including whenever a level of the input signals is below a predetermined low level, reducing the CM reference voltage level for implementing low duty cycle (LDC) PWM operation, and whenever the level is above a level that corresponds to an onset of clipping, increasing the CM reference voltage level for at least reducing the clipping to lower crossover distortion.Type: ApplicationFiled: December 17, 2014Publication date: August 6, 2015Inventor: LAWRENCE CHRISTOPHER COTTON
-
Patent number: 8542353Abstract: A refractive index sensor having one or more sources, an adaptive optical element or scanner, imaging optics, a sensing optic, and one or more detectors. The scanner impinges a signal from the source into the sensing optic and onto a sensor-sample interface at sequential angles of incidence. The detector response increases dramatically to signals reflected from the interface at corresponding sequential angles of reflection equal to or greater than a critical angle. The refractive index sensor also uses an input lens between the scanner and the sensing optic and uses an output lens between the sensing optic and the detector. A processor controls the sensor and can determine index of refraction of the fluid sample based on the detector response and scan rate. The sensor can be used in several operational environments from a laboratory to a downhole tool, such as a formation tester to determine properties in a borehole environment.Type: GrantFiled: September 30, 2010Date of Patent: September 24, 2013Assignee: Precision Energy Services, Inc.Inventors: Sean M. Christian, Jess V. Ford, Bryan Statt, Thomas Blankinship, Dennis Roessler, Christopher Cotton, Bryan W. Kasperski, Margaret C. Waid
-
Publication number: 20120081698Abstract: A refractive index sensor having one or more sources, an adaptive optical element or scanner, imaging optics, a sensing optic, and one or more detectors. The scanner impinges a signal from the source into the sensing optic and onto a sensor-sample interface at sequential angles of incidence. The detector response increases dramatically to signals reflected from the interface at corresponding sequential angles of reflection equal to or greater than a critical angle. The refractive index sensor also uses an input lens between the scanner and the sensing optic and uses an output lens between the sensing optic and the detector. A processor controls the sensor and can determine index of refraction of the fluid sample based on the detector response and scan rate. The sensor can be used in several operational environments from a laboratory to a downhole tool, such as a formation tester to determine properties in a borehole environment.Type: ApplicationFiled: September 30, 2010Publication date: April 5, 2012Applicant: PRECISION ENERGY SERVICES, INC.Inventors: Sean M. Christian, Jess V. Ford, Bryan Statt, Thomas Blankinship, Dennis Roessler, Christopher Cotton, Bryan W. Kasperski, Margaret C. Waid
-
Publication number: 20100211333Abstract: A leak detection and identification system a Fabry-Perot etalon, an imaging lens, a microbolometer camera, and a computer for spectral and image data post-processing, wherein the data peaks are deconvoluted for use thus avoiding the need for bandpass filters.Type: ApplicationFiled: January 13, 2010Publication date: August 19, 2010Applicant: Integrated Process Resources, Inc.Inventors: Richard T. Pruet, Christopher Cotton
-
Patent number: 7751645Abstract: A camera for aerial photography includes a reference projector that projects collimated beams of light into the optical system entrance aperture which are imaged by an image recording device. The beams produce fiducial images present in every image captured by the imaging recording device. The fiducial images can be used to characterize the performance of the optical system and derive distortion correction coefficients. The distortion correction coefficients can be applied to a portion of an image, such as a group of pixels, or to the entire image, to thereby compensate for distortions in the optical system. In some embodiments, e.g., airborne cameras, the projector is rigidly coupled to an inertial measurement unit. The ability of the airborne camera to perform object geolocation from imagery is improved.Type: GrantFiled: December 5, 2008Date of Patent: July 6, 2010Assignee: Goodrich CorporationInventors: Douglas Alan Reneker, Christopher Cotton, Damon Diehl
-
Patent number: 7675618Abstract: A multiplexing spectrometer measures at least one parameter, such as temperature, pressure or stress. The system multiplexes the outputs of Bragg stack sensors deposited at the distant ends of optical fibers brought in contact or in close proximity to objects. The spectrometer detects the peaks of the optical signals returned from the Bragg stacks and converts them into corresponding values of the parameters of interest. The spectrometer includes an optical system that comprises an entrance slit, a diffraction grating as a light dispersing means. Multiplexing occurs on a two-dimensional solid state matrix photo detector detects and converts the light signals returned from the Bragg stack sensing elements into corresponding electrical signals, and a built-in look-up table to provides the values of the parameters of interest that correspond the spectral characteristics of the returned light signals.Type: GrantFiled: April 16, 2007Date of Patent: March 9, 2010Assignee: ASE Optics, Inc.Inventors: Todd Blalock, Christopher Cotton
-
Publication number: 20090225165Abstract: A camera for aerial photography includes a reference projector that projects collimated beams of light into the optical system entrance aperture which are imaged by an image recording device. The beams produce fiducial images present in every image captured by the imaging recording device. The fiducial images can be used to characterize the performance of the optical system and derive distortion correction coefficients. The distortion correction coefficients can be applied to a portion of an image, such as a group of pixels, or to the entire image, to thereby compensate for distortions in the optical system. In some embodiments, e.g., airborne cameras, the projector is rigidly coupled to an inertial measurement unit. The ability of the airborne camera to perform object geolocation from imagery is improved.Type: ApplicationFiled: December 5, 2008Publication date: September 10, 2009Inventors: Douglas Alan Reneker, Christopher Cotton, Damon W. Diehl
-
Patent number: 7496241Abstract: An optical system includes a reference projector that projects collimated beams of light into the optical system entrance aperture which are imaged by an image recording device. The beams produce fiducial images present in every image captured by the imaging recording device. The fiducial images can be used to characterize the performance of the optical system and derive distortion correction coefficients. The distortion correction coefficients can be applied to a portion of an image, such as a group of pixels, or to the entire image, to thereby compensate for distortions in the optical system. In some embodiments, e.g., airborne cameras, the projector is rigidly coupled to an inertial measurement unit. The ability of the airborne camera to perform object geolocation from imagery is improved. The fiducial images enable optical system performance to be characterized and distortion correction coefficients to be obtained and thereby improve the accuracy of a ray angle calculation to the object of interest.Type: GrantFiled: September 8, 2005Date of Patent: February 24, 2009Assignee: Goodrich CorporationInventors: Douglas Alan Reneker, Christopher Cotton, Damon W. Diehl
-
Publication number: 20080252885Abstract: A multiplexing spectrometer measures at least one parameter, such as temperature, pressure or stress. The system multiplexes the outputs of Bragg stack sensors deposited at the distant ends of optical fibers brought in contact or in close proximity to objects. The spectrometer detects the peaks of the optical signals returned from the Bragg stacks and converts them into corresponding values of the parameters of interest. The spectrometer includes an optical system that comprises an entrance slit, a diffraction grating as a light dispersing means. Multiplexing occurs on a two-dimensional solid state matrix photo detector detects and converts the light signals returned from the Bragg stack sensing elements into corresponding electrical signals, and a built-in look-up table to provides the values of the parameters of interest that correspond the spectral characteristics of the returned light signals.Type: ApplicationFiled: April 16, 2007Publication date: October 16, 2008Inventors: Todd Blalock, Christopher Cotton
-
Publication number: 20070132958Abstract: An optical system for a digital light projection system is provided. The optical system comprises a plurality of LED arrays, wherein each LED array comprises a plurality of LEDs. The optical system also comprises an optical concentrator element positioned substantially adjacent to each of the LED arrays, wherein each concentrator element reflects light emitted from the plurality of LEDs within the corresponding LED array so as to provide substantially uniform light at an output surface of each concentrator element. The optical system preferably further comprises an optical combiner element, wherein the output surface of each concentrator element is optically aligned with a corresponding side of the combiner element, and wherein the combiner element chromatically combines the substantially uniform light provided at the output surface of each concentrator element so as to form color-combined light at an output surface of the combiner element.Type: ApplicationFiled: March 13, 2006Publication date: June 14, 2007Inventors: James Shanley, Christopher Cotton
-
Publication number: 20070002445Abstract: An optical diffraction grating having a superior ultra-precise non-planar surface shape desired in extremely sensitive and complex optical imaging devices (e.g. spectrometers or hyperspectral imagers) is provided. The optical diffraction grating comprises a substrate having a plurality of substantially parallel grooves, wherein each of the grooves includes a plurality of substantially parallel sub-grooves. A non-planar substrate surface shape is defined by a combination of the grooves. A groove profile is defined by a combination of the sub-grooves within a corresponding one of the grooves. In a preferred method of manufacturing the optical diffraction grating, a rotating spindle technique would be employed.Type: ApplicationFiled: July 1, 2005Publication date: January 4, 2007Inventor: Christopher Cotton
-
Patent number: 6271838Abstract: Methods and systems for using a sash control graphic to resize panes in a window are disclosed herein. In the present invention, a sash control comprising at least one direction area and a drag area is used to resize panes in a display window. Information reflecting a first configuration of the panes within the window is stored. The panes may be automatically reset to the first configuration from a second configuration within the window based on the stored information in response to a single-action activation of the at least one direction area of the sash control without moving or dragging the sash control.Type: GrantFiled: June 30, 1998Date of Patent: August 7, 2001Assignee: Sun Microsystems, Inc.Inventors: Donald R. Gentner, John Evans, Christopher Cotton
-
Patent number: 5572355Abstract: An apparatus for stretching or compressing an ultrashort pulse in time that is free of non-linear and spatial distortion (temporal or spatial frequency chirp) comprises a first diffraction grating G, a concave spherically curved mirror [CCM] with a radius of curvature R.sub.1, a convex spherically curved mirror [CXM] with a radius of curvature R.sub.2, and a flat reflector, [PM]. As a result of propagation of the ultrashort input pulse through this system, the output pulse is either stretched (or compressed) in time so that it now has a duration many times longer (or many times shorter) than its input pulse duration, is spatially uniform (i.e. has no spatial chirp,) and collimated. It can be separated from the input pulse by passage through a Faraday isolator.Type: GrantFiled: May 1, 1995Date of Patent: November 5, 1996Assignee: Clark MXR, Inc.Inventors: Christopher Cotton, Yang Pang