Patents by Inventor Keith E. O'Hara
Keith E. O'Hara 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).
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Patent number: 11153463Abstract: A camera capable of quickly updating a region of interest (ROI) in its sensor array is provided. The camera is configured to image individual scan lines of a scan imager created as a scan beam is scanned across a subject. A different ROI is defined for each scan line to be imaged. To achieve this, a table of ROI-defining entries is loaded into the camera prior to imaging the scan lines. The ROI-defining entries are used to update the sensor's ROI during the camera's Frame-Overhead-Time. In this manner, the ROI is changed in between the imaging of consecutive scans lines.Type: GrantFiled: September 27, 2018Date of Patent: October 19, 2021Assignee: CARL ZEISS MEDITEC, INC.Inventors: Michael Doyle, Keith E. O'Hara, Csaba Farkas
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Publication number: 20200106929Abstract: A camera capable of quickly updating a region of interest (ROI) in its sensor array is provided. The camera is configured to image individual scan lines of a scan imager created as a scan beam is scanned across a subject. A different ROI is defined for each scan line to be imaged. To achieve this, a table of ROI-defining entries is loaded into the camera prior to imaging the scan lines. The ROI-defining entries are used to update the sensor's ROI during the camera's Frame-Overhead-Time. In this manner, the ROI is changed in between the imaging of consecutive scans lines.Type: ApplicationFiled: September 27, 2018Publication date: April 2, 2020Inventors: Michael DOYLE, Keith E. O'HARA, Csaba FARKAS
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Patent number: 10512395Abstract: Methods to create montages of wide-field fundus images, while correcting for the projective distortion inherent to an imaging system are described. The methods use specific knowledge of the imaging geometry of the particular imaging system to map the fundus images onto a set of 3D ray vectors, which allows them to be stitched together efficiently and precisely. After co-aligning the images using feature detection and matching, the registered images are projected back into 2D to generate the final montaged image. The method could be used on any type of wide-field fundus images including, but not limited to, those generated from optical coherence tomography, optical coherence tomography angiography, and broad-line fundus imaging systems.Type: GrantFiled: April 28, 2017Date of Patent: December 24, 2019Assignee: CARL ZEISS MEDITEC, INC.Inventors: Conor Leahy, Keith E. O'Hara
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Publication number: 20170316565Abstract: Methods to create montages of wide-field fundus images, while correcting for the projective distortion inherent to an imaging system are described. The methods use specific knowledge of the imaging geometry of the particular imaging system to map the fundus images onto a set of 3D ray vectors, which allows them to be stitched together efficiently and precisely. After co-aligning the images using feature detection and matching, the registered images are projected back into 2D to generate the final montaged image. The method could be used on any type of wide-field fundus images including, but not limited to, those generated from optical coherence tomography, optical coherence tomography angiography, and broad-line fundus imaging systems.Type: ApplicationFiled: April 28, 2017Publication date: November 2, 2017Inventors: Conor LEAHY, Keith E. O'HARA
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Patent number: 9706915Abstract: An image data set acquired by an optical coherence tomography (OCT) system is corrected for effects due to motion of the sample. A first set of A-scans is acquired within a time short enough to avoid any significant motion of the sample. A second more extensive set of A-scans is acquired over an overlapping region on the sample. Significant sample motion may occur during acquisition of the second set. A-scans from the first set are matched with A-scans from the second set, based on similarity between the longitudinal optical scattering profiles they contain. Such matched pairs of A-scans are likely to correspond to the same region in the sample. Comparison of the OCT scanner coordinates that produced each A-scan in a matching pair, in conjunction with any shift in the longitudinal scattering profiles between the pair of A-scans, reveals the displacement of the sample between acquisition of the first and second A-scans in the pair.Type: GrantFiled: September 22, 2015Date of Patent: July 18, 2017Assignee: CARL ZEISS MEDITEC, INC.Inventors: Matthew J. Everett, Keith E. O'Hara
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Publication number: 20160227998Abstract: An improved fundus imager for recording an image of a fundus of an eye is described. A line from a point on the fundus at a center of the image to a center of a pupil of the eye defines an axis. The fundus imager includes at least a source of illuminating light, optics for directing the illuminating light to the fundus of the eye, and a rotating element for rotating the illuminating about the axis such that the illuminating light illuminates the fundus at a plurality of locations around the axis. In a preferred embodiment of the present application, the rotating element is a rotating slit-shaped illumination aperture. In an alternate embodiment, the rotating element is a Dove prism for rotating the illuminating light on the fundus.Type: ApplicationFiled: February 1, 2016Publication date: August 11, 2016Inventors: Tilman SCHMOLL, Keith E. O'HARA
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Publication number: 20160106314Abstract: An image data set acquired by an optical coherence tomography (OCT) system is corrected for effects due to motion of the sample. A first set of A-scans is acquired within a time short enough to avoid any significant motion of the sample. A second more extensive set of A-scans is acquired over an overlapping region on the sample. Significant sample motion may occur during acquisition of the second set. A-scans from the first set are matched with A-scans from the second set, based on similarity between the longitudinal optical scattering profiles they contain. Such matched pairs of A-scans are likely to correspond to the same region in the sample. Comparison of the OCT scanner coordinates that produced each A-scan in a matching pair, in conjunction with any shift in the longitudinal scattering profiles between the pair of A-scans, reveals the displacement of the sample between acquisition of the first and second A-scans in the pair.Type: ApplicationFiled: September 22, 2015Publication date: April 21, 2016Inventors: Matthew J. EVERETT, Keith E. O'HARA
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Patent number: 9167964Abstract: An image data set acquired by an optical coherence tomography (OCT) system is corrected for effects due to motion of the sample. A first set of A-scans is acquired within a time short enough to avoid any significant motion of the sample. A second more extensive set of A-scans is acquired over an overlapping region on the sample. Significant sample motion may occur during acquisition of the second set. A-scans from the first set are matched with A-scans from the second set, based on similarity between the longitudinal optical scattering profiles they contain. Such matched pairs of A-scans are likely to correspond to the same region in the sample. Comparison of the OCT scanner coordinates that produced each A-scan in a matching pair, in conjunction with any shift in the longitudinal scattering profiles between the pair of A-scans, reveals the displacement of the sample between acquisition of the first and second A-scans in the pair.Type: GrantFiled: April 1, 2014Date of Patent: October 27, 2015Assignee: CARL ZEISS MEDITEC, INC.Inventors: Matthew J. Everett, Keith E. O'Hara
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Patent number: 9033504Abstract: A line scan imager is used to determine the motion of a subject. Each line of image data from the line scan imager is compared with a reference image. The location of a matching line in the reference image reveals the displacement of the subject. The current subject displacement can be determined based on each line of image data. The resulting displacement information can be used to correctly place other optical beams on the subject. The method can be applied to tracking the human eye to facilitate measurement, imaging, or treatment with a beam of optical radiation.Type: GrantFiled: January 13, 2014Date of Patent: May 19, 2015Assignee: Carl Zeiss Meditec, Inc.Inventors: Matthew J. Everett, Claus Flachenecker, Martin Hacker, Scott A. Meyer, Keith E. O'Hara, Rick A. Williams
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Publication number: 20140362342Abstract: The invention relates generally to optical tomographic imaging and in particular to systems and methods for adapting the resolution of imaging. One embodiment of the present invention is an apparatus for optical coherence tomography imaging, characterized by its ability to vary the axial resolution and scanning speed during imaging.Type: ApplicationFiled: May 14, 2014Publication date: December 11, 2014Applicant: CARL ZEISS MEDITEC, INC.Inventors: Matthew J. EVERETT, Keith E. O'HARA
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Publication number: 20140240670Abstract: An image data set acquired by an optical coherence tomography (OCT) system is corrected for effects due to motion of the sample. A first set of A-scans is acquired within a time short enough to avoid any significant motion of the sample. A second more extensive set of A-scans is acquired over an overlapping region on the sample. Significant sample motion may occur during acquisition of the second set. A-scans from the first set are matched with A-scans from the second set, based on similarity between the longitudinal optical scattering profiles they contain. Such matched pairs of A-scans are likely to correspond to the same region in the sample. Comparison of the OCT scanner coordinates that produced each A-scan in a matching pair, in conjunction with any shift in the longitudinal scattering profiles between the pair of A-scans, reveals the displacement of the sample between acquisition of the first and second A-scans in the pair.Type: ApplicationFiled: April 1, 2014Publication date: August 28, 2014Applicant: CARL ZEISS MEDITEC, INC.Inventors: Matthew J. EVERETT, Keith E. O'HARA
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Publication number: 20140226130Abstract: A line scan imager is used to determine the motion of a subject. Each line of image data from the line scan imager is compared with a reference image. The location of a matching line in the reference image reveals the displacement of the subject. The current subject displacement can be determined based on each line of image data. The resulting displacement information can be used to correctly place other optical beams on the subject. The method can be applied to tracking the human eye to facilitate measurement, imaging, or treatment with a beam of optical radiation.Type: ApplicationFiled: January 13, 2014Publication date: August 14, 2014Applicant: CARL ZEISS MEDITEC, INC.Inventors: Matthew J. EVERETT, Claus FLACHENECKER, Martin HACKER, Scott A. MEYER, Keith E. O'HARA, Rick A. WILLIAMS
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Patent number: 8757803Abstract: The invention relates generally to optical tomographic imaging and in particular to systems and methods for adapting the resolution of imaging. One embodiment of the present invention is an apparatus for optical coherence tomography imaging, characterized by its ability to vary the axial resolution and scanning speed during imaging.Type: GrantFiled: May 28, 2013Date of Patent: June 24, 2014Assignee: Carl Zeiss Meditec, Inc.Inventors: Matthew J. Everett, Keith E. O'Hara
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Patent number: 8711366Abstract: An image data set acquired by an optical coherence tomography (OCT) system is corrected for effects due to motion of the sample. A first set of A-scans is acquired within a time short enough to avoid any significant motion of the sample. A second more extensive set of A-scans is acquired over an overlapping region on the sample. A-scans from the first set are matched with A-scans from the second set. Comparison of the OCT scanner coordinates that produced each A-scan in a matching pair reveals the displacement of the sample between acquisition of the first and second A-scans in the pair. Estimates of the sample displacement are used to correct the transverse and longitudinal coordinates of the A-scans in the second set, to form a motion-corrected OCT data set.Type: GrantFiled: January 24, 2012Date of Patent: April 29, 2014Assignee: Carl Zeiss Meditec, Inc.Inventors: Matthew J. Everett, Keith E. O'Hara
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Patent number: 8649611Abstract: A line scan imager is used to determine the motion of a subject. Each line of image data from the line scan imager is compared with a reference image. The location of a matching line in the reference image reveals the displacement of the subject. The current subject displacement can be determined based on each line of image data. The resulting displacement information can be used to correctly place other optical beams on the subject. The method can be applied to tracking the human eye to facilitate measurement, imaging, or treatment with a beam of optical radiation.Type: GrantFiled: January 11, 2013Date of Patent: February 11, 2014Assignee: Carl Zeiss Meditec, Inc.Inventors: Matthew J. Everett, Claus Flachenecker, Martin Hacker, Scott A. Meyer, Keith E. O'Hara, Rick A. Williams
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Publication number: 20130250241Abstract: The invention relates generally to optical tomographic imaging and in particular to systems and methods for adapting the resolution of imaging. One embodiment of the present invention is an apparatus for optical coherence tomography imaging, characterized by its ability to vary the axial resolution and scanning speed during imaging.Type: ApplicationFiled: May 28, 2013Publication date: September 26, 2013Applicant: CARL ZEISS MEDITEC, INC.Inventors: Matthew J. EVERETT, Keith E. O'HARA
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Patent number: 8500279Abstract: The invention relates generally to optical tomographic imaging and in particular to systems and methods for adapting the resolution of imaging. One embodiment of the present invention is an apparatus for optical coherence tomography imaging, characterized by its ability to vary the axial resolution and scanning speed during imaging.Type: GrantFiled: November 4, 2009Date of Patent: August 6, 2013Assignee: Carl Zeiss Meditec, Inc.Inventors: Matthew J. Everett, Keith E. O'Hara
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Patent number: 8363958Abstract: A line scan imager is used to determine the motion of a subject. Each line of image data from the line scan imager is compared with a reference image. The location of a matching line in the reference image reveals the displacement of the subject. The current subject displacement can be determined based on each line of image data. The resulting displacement information can be used to correctly place other optical beams on the subject. The method can be applied to tracking the human eye to facilitate measurement, imaging, or treatment with a beam of optical radiation.Type: GrantFiled: October 18, 2011Date of Patent: January 29, 2013Assignee: Carl Zeiss Meditec, Inc.Inventors: Matthew J. Everett, Claus Flachenecker, Martin Hacker, Scott A. Meyer, Keith E. O'Hara, Rick A. Williams
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Publication number: 20120140175Abstract: An image data set acquired by an optical coherence tomography (OCT) system is corrected for effects due to motion of the sample. A first set of A-scans is acquired within a time short enough to avoid any significant motion of the sample. A second more extensive set of A-scans is acquired over an overlapping region on the sample. A-scans from the first set are matched with A-scans from the second set. Comparison of the OCT scanner coordinates that produced each A-scan in a matching pair reveals the displacement of the sample between acquisition of the first and second A-scans in the pair. Estimates of the sample displacement are used to correct the transverse and longitudinal coordinates of the A-scans in the second set, to form a motion-corrected OCT data set.Type: ApplicationFiled: January 24, 2012Publication date: June 7, 2012Applicant: Carl Zeiss Meditec, Inc.Inventors: Matthew J. Everett, Keith E. O'Hara
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Publication number: 20120128222Abstract: A line scan imager is used to determine the motion of a subject. Each line of image data from the line scan imager is compared with a reference image. The location of a matching line in the reference image reveals the displacement of the subject. The current subject displacement can be determined based on each line of image data. The resulting displacement information can be used to correctly place other optical beams on the subject. The method can be applied to tracking the human eye to facilitate measurement, imaging, or treatment with a beam of optical radiation.Type: ApplicationFiled: October 18, 2011Publication date: May 24, 2012Applicant: Carl Zeiss Meditec, Inc.Inventors: Matthew J. Everett, Claus Flachenecker, Martin Hacker, Scott A. Meyer, Keith E. O'Hara, Rick A. Williams