Patents Assigned to PHASE FOCUS LIMITED
  • Patent number: 10679038
    Abstract: Embodiments of the present invention provide a computer-implemented method of determining temporal behaviour of an object, comprising receiving image data comprising data representing a plurality of images, at least some of the images comprising one or more cells, determining a plurality of characteristics of at least one feature in each of one or more of the plurality of images, determining a confidence value representing a confidence that one of the cells in a first one of the plurality of images corresponds to a feature in a second one of the plurality images, wherein the confidence value is based upon the characteristics of the feature in the second image and the characteristics of the cell, and identifying the cell in the second one of the plurality of images based upon the confidence value.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: June 9, 2020
    Assignee: PHASE FOCUS LIMITED
    Inventors: Martin James Humphry, Kevin Langley, James Russell
  • Patent number: 10466184
    Abstract: Embodiments of the present invention provide a method of providing image data for constructing an image of at least a region of a target object, comprising the steps of simultaneously recording, at a detector, a plurality of separable diffraction patterns formed by a respective portion of radiation scattered by the target object; and providing the image data via an iterative process responsive to the detected intensity of radiation.
    Type: Grant
    Filed: May 3, 2013
    Date of Patent: November 5, 2019
    Assignee: PHASE FOCUS LIMITED
    Inventor: Andrew Maiden
  • Publication number: 20180357468
    Abstract: Embodiments of the present invention provide a computer-implemented method of determining temporal behaviour of an object, comprising receiving image data comprising data representing a plurality of images, at least some of the images comprising one or more cells, determining a plurality of characteristics of at least one feature in each of one or more of the plurality of images, determining a confidence value representing a confidence that one of the cells in a first one of the plurality of images corresponds to a feature in a second one of the plurality images, wherein the confidence value is based upon the characteristics of the feature in the second image and the characteristics of the cell, and identifying the cell in the second one of the plurality of images based upon the confidence value.
    Type: Application
    Filed: April 29, 2016
    Publication date: December 13, 2018
    Applicant: PHASE FOCUS LIMITED
    Inventors: Martin James Humphry, Kevin Langley, James Russell
  • Patent number: 9784640
    Abstract: Embodiments of the invention provide a method of determining one or more characteristics of a target object, comprising recording one or more diffraction patterns at a detector, wherein each diffraction pattern is formed by a target object scattering incident radiation, determining a phase map for at least a region of the target object based on the one or more diffraction patterns, and determining a refractive property of the target object based on the phase map.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: October 10, 2017
    Assignee: PHASE FOCUS LIMITED
    Inventors: Martin James Humphry, Kevin Langley, James Russell, Andrew Michael Maiden
  • Patent number: 9618332
    Abstract: Embodiments of the invention provide a method of determining a position of an object with respect to incident radiation, comprising iteratively determining at least one of an object function indicating one or more characteristics of an object and a probe function indicative of one or more characteristics of incident radiation, iteratively determining the position of the object, wherein the iteratively determining the position of the object comprises cross correlating first and second estimates of the object function or the probe function, determining a location of a peak of the cross correlation, and determining a translation deviation indicative of a difference in position of the object between the first and second estimates based on the location of the peak.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: April 11, 2017
    Assignee: PHASE FOCUS LIMITED
    Inventor: Fucai Zhang
  • Patent number: 9448160
    Abstract: Embodiments of the present invention provide a method (200) of providing image data for constructing an image of a region of a target object, comprising detecting, by at least one detector (40), at least a portion of radiation scattered by a target object (30) with the incident radiation (10) or an aperture at a predetermined probe position, determining an offset vector (203) for reducing an error associated with the probe position (201), estimating a wavefront (210) based on a probe function having the offset vector applied to the probe position, and providing image data responsive to the detected radiation.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: September 20, 2016
    Assignee: PHASE FOCUS LIMITED
    Inventors: Andrew Michael Maiden, Martin James Humphry
  • Patent number: 9401042
    Abstract: A method of providing image data for constructing an image of a region of a three dimensional target object, comprising providing, from a radiation source, incident radiation directed at a target object, detecting an intensity of radiation scattered by the target object, and determining image data for each of a respective plurality of slices within the target object each indicating one or more characteristics of the target object at a respective depth within the target object, wherein the image data is determined based on the detected intensity of radiation via an iterative process wherein running estimates of the image data for each of the plurality of slices are updated step by step.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: July 26, 2016
    Assignee: PHASE FOCUS LIMITED
    Inventors: John Marius Rodenburg, Andrew Maiden, Martin Humphry
  • Patent number: 9322791
    Abstract: Embodiments of the present invention provide a method of estimating a magnitude of background radiation for each of a plurality of regions of a target object comprising providing an estimate of background radiation detected by a detector, measuring radiation scattered by the target object at the detector for each of a plurality of positions of the object with respect to the incident radiation, calculating, for each of the positions, an estimate of a wavefront at the detector, and determining, for each position, an estimated wavefront comprising a coherent contribution from radiation scattered by the target object and a background contribution, wherein said background contribution is at least partly incoherent with the radiation scattered by the target object. This method is particularly suitable for performing coherent diffractive imaging using ptychography where contribution from the incoherently scattered background is taken into account.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: April 26, 2016
    Assignee: PHASE FOCUS LIMITED
    Inventors: Martin James Humphry, Andrew Maiden
  • Patent number: 9274024
    Abstract: Embodiments of the invention provide a method of determining one or more characteristics of a target object, comprising determining a first phase map for at least a region of a target object based on radiation directed toward the target object, determining one or more further phase maps for a sub-region of the region of the target object, determining a number of phase wraps for the sub-region based on a plurality of phase maps for the sub-region, and determining a characteristic of the region of the target object based on the number of phase wraps for sub-region and the first phase map. Embodiments of the invention also relate to a method of determining one or more characteristics of a target object, comprising determining a phase map for at least a region of a target object based on one or more diffraction patterns, determining a wavefront at a plane of the object based upon the phase map, and determining a refractive property of the object based on the wavefront.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: March 1, 2016
    Assignee: PHASE FOCUS LIMITED
    Inventors: Martin James Humphry, Kevin Langley, James Russell, Andrew Michael Maiden
  • Patent number: 9202295
    Abstract: Embodiments of the present invention provide a computer-based method for providing image data of a region of a target object (31), comprising the steps of estimating (706) a first intermediate object function indicating at least one characteristic of a first sub-region (501, 503) of said region of the target object, estimating (706) a second intermediate object function indicating at least one characteristic of a second sub-region (502, 504) of said region of the target object, and combining (707) the first and second intermediate object functions to form a combined object function indicating at least one characteristic of the region of the target object (31).
    Type: Grant
    Filed: September 23, 2009
    Date of Patent: December 1, 2015
    Assignee: PHASE FOCUS LIMITED
    Inventors: Paul Roberts, Andrew Maiden
  • Patent number: 9121764
    Abstract: Embodiments of the present invention provide a method of providing image data for constructing an image of a region of a target object, comprising providing incident radiation from a radiation source at a target object, detecting, by at least one detector, a portion of radiation scattered by the target object with the incident radiation or an aperture at first and second positions, and providing image data via an iterative process responsive to the detected radiation, wherein in said iterative process image data is provided corresponding to a portion of radiation scattered by the target object and not detected by the detector.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: September 1, 2015
    Assignee: PHASE FOCUS LIMITED
    Inventor: Andrew Maiden
  • Patent number: 9116120
    Abstract: A method and apparatus are disclosed for providing image data for constructing an image of a region of a three dimensional target object. The method includes the steps of providing incident radiation, via at least one detector detecting an intensity of radiation scattered by the target object, repositioning incident radiation relative to the target object, subsequently detecting the intensity of radiation scattered by the target object, determining a probe function indicating an estimate of at least one characteristic of the incident radiation at one or more depths of the object and providing image data from which an image of one or more regions of the object may be constructed via an iterative process using the probe function.
    Type: Grant
    Filed: February 25, 2008
    Date of Patent: August 25, 2015
    Assignee: Phase Focus Limited
    Inventor: John Marius Rodenburg
  • Patent number: 9087674
    Abstract: Embodiments of the present invention provide a method of determining at least one characteristic of a target surface, comprising providing a phase map for a first region of a target surface via radiation having a first wavelength, providing n further phase maps for the first region via radiation having a further n wavelengths each different from the first wavelength, and determining at least one characteristic at the target surface responsive to the first and further phase maps.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: July 21, 2015
    Assignee: PHASE FOCUS LIMITED
    Inventors: Martin Humphry, Andrew Maiden
  • Patent number: 9086570
    Abstract: A method and apparatus are disclosed for generating a plurality of scattered radiation patterns at an image plane of an optical microscope. The apparatus includes at least one lens element, a liquid crystal display (LCD) array, and a housing comprising a body portion supporting the LCD array and lens element in a predetermined spaced apart relationship. The LCD array comprises a plurality of pixel elements arranged in a grid layout, said array being connectable to a processing element adapted to selectively control a transmittance of each pixel in the grid layout.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: July 21, 2015
    Assignee: PHASE FOCUS LIMITED
    Inventor: Andrew Maiden
  • Patent number: 9086320
    Abstract: Embodiments of the present invention provide a method of providing image data for constructing an image of a region of a target object, comprising providing incident radiation from a radiation source at a target object, detecting, by at least one detector, a portion of radiation scattered by the target object with the incident radiation or an aperture at first and second positions, and providing image data via an iterative process responsive to the detected radiation, wherein in said iterative process image data is provided corresponding to a portion of radiation scattered by the target object and not detected by the detector.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: July 21, 2015
    Assignee: PHASE FOCUS LIMITED
    Inventor: Andrew Maiden
  • Patent number: 9029745
    Abstract: Embodiments of the present invention provide a method of providing image data for constructing an image of a region of a target object (40) comprising providing incident radiation from a radiation source at a target object (40); detecting, by at least one detector (50), a portion of radiation scattered by the target object; and providing image data via an iterative process responsive to the detected radiation (340), wherein said iterative process comprises estimating a wave front of scattered radiation at a plane of the detector, updating a portion of the wave front based on the detected radiation, leaving a portion of the estimated wave front substantially unchanged, setting a portion of the wave front, corresponding to a portion of radiation scattered by the target object and not detected by the detector, to one or more values, and providing image data based upon the updated wave front.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: May 12, 2015
    Assignee: Phase Focus Limited
    Inventor: Andrew Maiden
  • Patent number: 8942449
    Abstract: A method of providing image data for constructing an image of a region of a target object, comprising providing a reference diffraction pattern of a reference target object; determining an initial guess for a probe function based upon the reference diffraction pattern; and determining, by an iterative process based on the initial guess for the probe function and an initial guess for an object function, image data for a target object responsive to an intensity of radiation detected by at least one detector.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: January 27, 2015
    Assignee: Phase Focus Limited
    Inventor: Andrew Maiden
  • Patent number: 8917393
    Abstract: A method and apparatus are disclosed for providing image data for generating an image of a region of a target object. The method includes the steps of providing incident radiation, focusing the radiation downstream or upstream of a target object and via at least one detector located downstream of a focusing element, detecting an intensity of radiation scattered by the target object at an observation plane offset from a back focal plane associated with the focusing element.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: December 23, 2014
    Assignee: Phase Focus Limited
    Inventor: Andrew Maiden
  • Patent number: 8908910
    Abstract: A method and apparatus are disclosed for providing image data. The method includes the steps of providing incident radiation from a radiation source at a target object and, via at least one detector, detecting an intensity of radiation scattered by the target object. Also via the at least one detector an intensity of radiation provided by the radiation source absent the target object is detected. Image data is provided via an iterative process responsive to the intensity of radiation detected absent the target object and the detected intensity of radiation scattered by the target object.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: December 9, 2014
    Assignee: Phase Focus Limited
    Inventor: Andrew Maiden
  • Publication number: 20140207409
    Abstract: Embodiments of the invention provide a method of determining a position of an object with respect to incident radiation, comprising iteratively determining at least one of an object function indicating one or more characteristics of an object and a probe function indicative of one or more characteristics of incident radiation, iteratively determining the position of the object, wherein the iteratively determining the position of the object comprises cross correlating first and second estimates of the object function or the probe function, determining a location of a peak of the cross correlation, and determining a translation deviation indicative of a difference in position of the object between the first and second estimates based on the location of the peak.
    Type: Application
    Filed: July 13, 2012
    Publication date: July 24, 2014
    Applicant: PHASE FOCUS LIMITED
    Inventor: Fucai Zhang