Patents by Inventor Alexander J. Majewski

Alexander J. Majewski 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: 20240402010
    Abstract: Optical systems include a first optical element featuring a first substrate, a partially-reflective coating disposed on a first surface of the first substrate, a first meta-material layer positioned on or adjacent to a first surface of the first substrate and including a structure that defines a continuous phase gradient along a first direction parallel to the first surface of the first substrate, and a second optical element featuring a second substrate and a second meta-material layer positioned on or adjacent to a first surface of the second substrate and comprising a structure that defines a continuous phase gradient along a second direction parallel to the first surface of the first substrate, where at least one surface of the second optical element is curved along the second direction.
    Type: Application
    Filed: May 31, 2024
    Publication date: December 5, 2024
    Inventors: Alexander J. Majewski, Andrea Alu, Adam C. Overvig, Shuwei Guo
  • Publication number: 20240402407
    Abstract: Optical systems include a first optical element featuring a first substrate, a partially-reflective coating disposed on a first surface of the first substrate, a first meta-material layer positioned on or adjacent to a first surface of the first substrate and including a structure that defines a continuous phase gradient along a first direction parallel to the first surface of the first substrate, and a second optical element featuring a second substrate and a second meta-material layer positioned on or adjacent to a first surface of the second substrate and comprising a structure that defines a continuous phase gradient along a second direction parallel to the first surface of the first substrate, where at least one surface of the second optical element is curved along the second direction.
    Type: Application
    Filed: May 31, 2024
    Publication date: December 5, 2024
    Inventors: Alexander J. Majewski, Andrea Alu, Adam C. Overig, Shuwei Guo
  • Publication number: 20240402008
    Abstract: Optical elements include a substrate, a partially-reflective coating disposed on a first surface of the substrate, a meta-material layer positioned on or adjacent to a first surface of the substrate and featuring a structure that defines a continuous phase gradient along a first direction parallel to the first surface of the substrate, where a change in magnitude of the phase along the first direction is at least 2? at a wavelength ?, and a partially-reflective layer disposed on or adjacent to the meta-material layer and on an opposite side of the meta-material layer from the substrate.
    Type: Application
    Filed: May 31, 2024
    Publication date: December 5, 2024
    Inventors: Alexander J. Majewski, Andrea Alu, Adam C. Overvig, Shuwei Guo
  • Patent number: 10705022
    Abstract: An optical head for a Raman spectroscopy system includes a housing an input configured to allow input radiation of a selected wavelength into the housing, a first lens disposed in an end of the housing to allow the input radiation to emit from the housing through the first lens and to receive reflected radiation including specular reflection and diffuse reflection, and a second lens disposed in the housing and configured to receive reflected radiation from the first lens. The optical head includes an output configured to receive the reflected radiation from the second lens. The optical head includes a blocking mirror disposed in the housing between the first lens and the second lens. The blocking mirror is configured and positioned to direct the radiation from the input to the first lens. The blocking mirror blocks at least a portion of specular reflection from reaching the second lens but allows diffuse reflection to the reach the second lens.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: July 7, 2020
    Assignee: Goodrich Corporation
    Inventors: David Madsen, Alexander J. Majewski
  • Publication number: 20180059024
    Abstract: An optical head for a Raman spectroscopy system includes a housing an input configured to allow input radiation of a selected wavelength into the housing, a first lens disposed in an end of the housing to allow the input radiation to emit from the housing through the first lens and to receive reflected radiation including specular reflection and diffuse reflection, and a second lens disposed in the housing and configured to receive reflected radiation from the first lens. The optical head includes an output configured to receive the reflected radiation from the second lens. The optical head includes a blocking mirror disposed in the housing between the first lens and the second lens. The blocking mirror is configured and positioned to direct the radiation from the input to the first lens. The blocking mirror blocks at least a portion of specular reflection from reaching the second lens but allows diffuse reflection to the reach the second lens.
    Type: Application
    Filed: August 24, 2016
    Publication date: March 1, 2018
    Inventors: David Madsen, Alexander J. Majewski
  • Patent number: 8145064
    Abstract: A system for suppressing noise by frequency dither includes a transmitter, receiver and a frequency dither circuit, as well as a cavity along a propagation path of the electromagnetic signal between the transmitter and the receiver. The transmitter is configured to transmit an electromagnetic signal to the receiver at each of one or more selectable frequencies. The frequency dither circuit is configured to apply a frequency dither to the electromagnetic signal transmitted from the transmitter to the receiver at each of the selectable frequencies. In this regard, the applied frequency dither has a span having been selected as a function of a minimum frequency period of an expected standing wave in the system, and a rate having been selected as a function of a signal processing bandwidth for sampling a frequency spectrum including the selectable frequencies.
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: March 27, 2012
    Assignee: Goodrich Corporation
    Inventors: Alexander J. Majewski, Rene Abreu
  • Publication number: 20100074363
    Abstract: A system for suppressing noise by frequency dither includes a transmitter, receiver and a frequency dither circuit, as well as a cavity along a propagation path of the electromagnetic signal between the transmitter and the receiver. The transmitter is configured to transmit an electromagnetic signal to the receiver at each of one or more selectable frequencies. The frequency dither circuit is configured to apply a frequency dither to the electromagnetic signal transmitted from the transmitter to the receiver at each of the selectable frequencies. In this regard, the applied frequency dither has a span having been selected as a function of a minimum frequency period of an expected standing wave in the system, and a rate having been selected as a function of a signal processing bandwidth for sampling a frequency spectrum including the selectable frequencies.
    Type: Application
    Filed: September 19, 2008
    Publication date: March 25, 2010
    Inventors: Alexander J. Majewski, Rene Abreu
  • Patent number: 7271594
    Abstract: A system for processing signals includes a receiver assembly for receiving a signal. The signal has a sample component with a sample electric field and a sample polarization, and has a reference component with a reference electric field and a reference polarization. The receiver assembly includes an analyzer for polarimetrically processing the signal, including differencing the signal to generate a difference electric field proportional to the difference of the sample and reference electric fields. By polarimetrically differencing the signal, the analyzer reduces the magnitude of the common-mode signal at the difference signal receiver. The receiver assembly includes an electric-field detector for measuring the difference electric field such that the reduction in common-mode amplitude decreases the noise equivalent power of the electric-field detector.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: September 18, 2007
    Assignee: Goodrich Corporation
    Inventors: Rene Abreu, Jeffrey Grotts, Alexander J. Majewski