Patents by Inventor Jean Armstrong

Jean Armstrong 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: 10267675
    Abstract: An optical receiver (100) for detection of light from one or more sources (108) comprises an opaque layer (102) disposed on a first surface. An aperture (104) is formed in the opaque layer. An optical detector (106) has a detection region disposed on a second surface. The first and second surfaces are spaced apart from one another such that light passing through the aperture (104) illuminates a corresponding illumination region (110) on the second surface, and is detected by the optical detector (106) In the event that the detection region overlaps the illumination region. Multiple apertures may be formed in the opaque layer, and/or multiple optical detectors may be disposed on the second surface. The optical receiver may thereby enable optical signals originating at different locations to be detected, and distinguished, over a wide field of view.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: April 23, 2019
    Assignee: Monash University
    Inventor: Jean Armstrong
  • Publication number: 20170363462
    Abstract: An optical receiver (100) for detection of light from one or more sources (108) comprises an opaque layer (102) disposed on a first surface. An aperture (104) is formed in the opaque layer. An optical detector (106) has a detection region disposed on a second surface. The first and second surfaces are spaced apart from one another such that light passing through the aperture (104) illuminates a corresponding illumination region (110) on the second surface, and is detected by the optical detector (106) In the event that the detection region overlaps the illumination region. Multiple apertures may be formed in the opaque layer, and/or multiple optical detectors may be disposed on the second surface. The optical receiver may thereby enable optical signals originating at different locations to be detected, and distinguished, over a wide field of view.
    Type: Application
    Filed: December 4, 2015
    Publication date: December 21, 2017
    Inventor: Jean Armstrong
  • Patent number: 8306435
    Abstract: A receiver for recovering transmitted information carried by a received optical signal that has been affected by dispersion includes an optical splitter having an input port arranged to receive the received optical signal, and a plurality of output ports. A proportion of optical power at the input port is transmitted to each of the output ports. A plurality of optical detectors is operably connected to respective output ports of the optical splitter, for generating a corresponding plurality of electrical signals. Optical phase shifters are disposed between the output ports of the optical splitter and respective optical detectors. As a result, each optical phase shifter applies a frequency dependent phase shift to an optical signal passing therethrough.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: November 6, 2012
    Assignee: Ofidium Pty, Ltd.
    Inventors: Jean Armstrong, Arthur Lowery
  • Patent number: 8111993
    Abstract: A system (100) for transmitting digital information includes a transmitting apparatus (102) for generating an optical signal bearing digital information, a dispersive optical channel (104), and a receiving apparatus (110) for receiving the optical signal. The dispersive optical channel (104) is disposed to convey the optical signal from the transmitting apparatus (102) to the receiving apparatus (110). The transmitting apparatus includes an encoder (114) for encoding digital information into a series of blocks, each including a plurality of data symbols corresponding with one or more bits of digital information. A signal generator (118) generates a time-varying signal corresponding with each of said blocks.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: February 7, 2012
    Assignee: Ofidium Pty Ltd.
    Inventors: Arthur James Lowery, Jean Armstrong
  • Patent number: 8107826
    Abstract: A method of communicating digital information over a dispersive optical channel includes encoding the digital information into a plurality of data blocks, each of which includes a number of bits of the information. A time-varying electrical signal is generated which corresponds with each of said data blocks. The time-varying electrical signal is applied to an optical transmitter (122) to generate an optical signal which includes an asymmetrically amplitude limited transmitted signal modulated onto an optical carrier. The optical signal is then transmitted over the dispersive optical channel (106). At a receiving apparatus (104) the optical signal is detected to produce an electrical signal which corresponds with the asymmetrically amplitude limited transmitted signal.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: January 31, 2012
    Assignee: Ofidium Pty Ltd.
    Inventors: Jean Armstrong, Arthur James Lowery
  • Patent number: 8107827
    Abstract: An apparatus and method are provided for receiving an optical signal having an optical carrier component and at least one information-bearing optical sideband. In general, an optical filter arrangement (110) is used to separate the optical carrier component from the information-bearing optical sideband. First and second optical splitters (126, 128) divide the optical power in the optical carrier and the optical sideband, respectively, into corresponding sub-components. The sub-components of the optical carrier have substantially orthogonal polarisation states, which is an optional characteristic of the sideband sub-components. First and second optical coupling devices (142, 144) respectively each combine one of the optical carrier sub-components with a corresponding one of the optical sideband sub-components. Optical detectors (158, 160) detect the outputs of the combiners (142, 144).
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: January 31, 2012
    Assignee: Ofidium Pty, Ltd.
    Inventors: Brendon James Schmidt, Arthur James Lowery, Jean Armstrong
  • Publication number: 20100316393
    Abstract: An apparatus and method are provided for receiving an optical signal having an optical carrier component and at least one information-bearing optical sideband. In general, an optical filter arrangement (110) is used to separate the optical carrier component from the information-bearing optical sideband. First and second optical splitters (126, 128) divide the optical power in the optical carrier and the optical sideband, respectively, into corresponding sub-components. The sub-components of the optical carrier have substantially orthogonal polarisation states, which is an optional characteristic of the sideband sub-components. First and second optical coupling devices (142, 144) respectively each combine one of the optical carrier sub-components with a corresponding one of the optical sideband sub-components. Optical detectors (158, 160) detect the outputs of the combiners (142, 144).
    Type: Application
    Filed: February 20, 2009
    Publication date: December 16, 2010
    Applicant: Ofidium Pty. Ltd.
    Inventors: Brendon James Schmidt, Arthur Jame Lowery, Jean Armstrong
  • Patent number: 7835454
    Abstract: The invention provides a new approach which is better suited to FFT design as applied to multicarrier modulation systems such as OFDM. The signals are scaled so that overflow, rather than being completely avoided, occurs with low probability throughout the IFFT and FFT structures. The size of the error that results from an overflow depends on how overflow is handled in the DSP. To minimize the degradation, overflow should result in saturation of the value at the maximum positive or negative value option. This is equivalent to clipping the signal. Using the new technique, signals within the FFT structure are scaled to balance the effect of clipping and round-off. Clipping may result in comparatively large errors in a few signal values but because of the spreading effect of the FFT and because OFDM systems typically include error coding/correction, system performance depends on the total error or, in other words the total noise power, across all of the FFT outputs rather than on any individual value.
    Type: Grant
    Filed: September 27, 2004
    Date of Patent: November 16, 2010
    Assignee: Analog Devices, B.V.
    Inventors: Jean Armstrong, Simon W. Brewer
  • Patent number: 7796898
    Abstract: Methods and apparatus (100) for composing, generating and transmitting information-bearing optical signals are provided. An information-bearing electrical signal is composed (108) having desirable spectral properties, preferably configured to ensure that undesired interference between electrical spectral components generated in a square-law direct detection process (120) at a corresponding optical receiver (104) is substantially avoided. Predistortion (110) is advantageously applied to transmitted signals, in order to account for a nonlinear relationship arising in a modulation process (114) between electrical signal amplitude and corresponding optical field amplitude. Orthogonal frequency division multiplexing (OFDM) techniques may be applied to composed signals having the desired characteristics, and additionally may facilitate the application of frequency domain equalisation (128) in order to mitigate transmission impairments, including dispersion.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: September 14, 2010
    Assignee: Ofidium Pty Ltd.
    Inventor: Jean Armstrong
  • Publication number: 20100142951
    Abstract: A receiver for recovering transmitted information carried by a received optical signal that has been affected by dispersion includes an optical splitter having an input port arranged to receive the received optical signal, and a plurality of output ports. A proportion of optical power at the input port is transmitted to each of the output ports. A plurality of optical detectors is operably connected to respective output ports of the optical splitter, for generating a corresponding plurality of electrical signals. Optical phase shifters are disposed between the output ports of the optical splitter and respective optical detectors. As a result, each optical phase shifter applies a frequency dependent phase shift to an optical signal passing therethrough.
    Type: Application
    Filed: February 15, 2008
    Publication date: June 10, 2010
    Applicant: OFIDIUM PTY LTD
    Inventors: Jean Armstrong, Arthur Lowery
  • Publication number: 20100034542
    Abstract: Methods and apparatus (100) for composing, generating and transmitting information-bearing optical signals are provided. An information-bearing electrical signal is composed (108) having desirable spectral properties, preferably configured to ensure that undesired interference between electrical spectral components generated in a square-law direct detection process (120) at a corresponding optical receiver (104) is substantially avoided. Predistortion (110) is advantageously applied to transmitted signals, in order to account for a nonlinear relationship arising in a modulation process (114) between electrical signal amplitude and corresponding optical field amplitude. Orthogonal frequency division multiplexing (OFDM) techniques may be applied to composed signals having the desired characteristics, and additionally may facilitate the application of frequency domain equalisation (128) in order to mitigate transmission impairments, including dispersion.
    Type: Application
    Filed: January 29, 2008
    Publication date: February 11, 2010
    Applicant: OFIDIUM PTY LTD
    Inventor: Jean Armstrong
  • Publication number: 20090220239
    Abstract: A method of communicating digital information over a dispersive optical channel includes encoding the digital information into a plurality of data blocks, each of which includes a number of bits of the information. A time-varying electrical signal is generated which corresponds with each of said data blocks. The time-varying electrical signal is applied to an optical transmitter (122) to generate an optical signal which includes an asymmetrically amplitude limited transmitted signal modulated onto an optical carrier. The optical signal is then transmitted over the dispersive optical channel (106). At a receiving apparatus (104) the optical signal is detected to produce an electrical signal which corresponds with the asymmetrically amplitude limited transmitted signal.
    Type: Application
    Filed: September 1, 2006
    Publication date: September 3, 2009
    Applicant: Monash University
    Inventors: Jean Armstrong, Arthur James Lowery
  • Publication number: 20090169213
    Abstract: A system (100) for transmitting digital information includes a transmitting apparatus (102) for generating an optical signal bearing digital information, a dispersive optical channel (104), and a receiving apparatus (110) for receiving the optical signal. The dispersive optical channel (104) is disposed to convey the optical signal from the transmitting apparatus (102) to the receiving apparatus (110). The transmitting apparatus includes an encoder (114) for encoding digital information into a series of blocks, each including a plurality of data symbols corresponding with one or more bits of digital information. A signal generator (118) generates a time-varying signal corresponding with each of said blocks.
    Type: Application
    Filed: October 12, 2006
    Publication date: July 2, 2009
    Applicant: Monash University
    Inventors: Arthur James Lowery, Jean Armstrong
  • Publication number: 20080206860
    Abstract: A vessel includes a gas reservoir. The vessel also includes at least one gas outlet. The gas outlet includes an integral gas permeable membrane. A culture system includes the vessel as a first vessel. The first vessel is coupled to a second vessel that includes or otherwise contains a cell, a plant, an animal or the like.
    Type: Application
    Filed: August 3, 2004
    Publication date: August 28, 2008
    Applicant: THE UNIVERSITY OF HULL
    Inventors: William Armstrong, Jean Armstrong
  • Publication number: 20050243938
    Abstract: The invention provides a new approach which is better suited to FFT design as applied to multicarrier modulation systems such as OFDM. The signals are scaled so that overflow, rather than being completely avoided, occurs with low probability throughout the IFFT and FFT structures. The size of the error that results from an overflow depends on how overflow is handled in the DSP. To minimize the degradation, overflow should result in saturation of the value at the maximum positive or negative value option. This is equivalent to clipping the signal. Using the new technique, signals within the FFT structure are scaled to balance the effect of clipping and round-off. Clipping may result in comparatively large errors in a few signal values but because of the spreading effect of the FFT and because OFDM systems typically include error coding/correction, system performance depends on the total error or, in other words the total noise power, across all of the FFT outputs rather than on any individual value.
    Type: Application
    Filed: September 27, 2004
    Publication date: November 3, 2005
    Applicant: Analog Devices, B.V.
    Inventors: Jean Armstrong, Simon Brewer
  • Patent number: 4888296
    Abstract: Monoclonal antibodies specific for thyroxine (T.sub.4) are produced by two new and separate hybridoma cell lines. Combinations of the monoclonal antibodies from the two cell lines are used in an immunoassay for T.sub.4 of high accuracy over the range of T.sub.4 concentrations encountered in serum samples.
    Type: Grant
    Filed: August 22, 1986
    Date of Patent: December 19, 1989
    Assignee: Becton, Dickinson and Company
    Inventors: Gary R. Siebert, Jean Armstrong
  • Patent number: 4636478
    Abstract: Monoclonal antibodies specific for thyroxine (T.sub.4) are produced by two new and separate hybridoma cell lines. Combinations of the monoclonal antibodies from the two cell lines are used in an immunoassay for T.sub.4 of high accuracy over the range of T.sub.4 concentrations encountered in serum samples.
    Type: Grant
    Filed: July 16, 1984
    Date of Patent: January 13, 1987
    Assignee: Becton, Dickinson and Company
    Inventors: Gary R. Siebert, Jean Armstrong