Patents by Inventor Guangming Dai

Guangming Dai 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: 7365893
    Abstract: Methods, systems and software for determining an optical surface model for an optical tissue system using Fourier transformation algorithms. A method of reconstructing optical tissues of an eye comprises transmitting an image through the optical tissues of the eye. The surface gradients from the transmitted image are measured across the optical tissues of the eye. A Fourier transform algorithm is applied to the surface gradients to reconstruct an optical surface model that corresponds to the optical tissues of the eye.
    Type: Grant
    Filed: December 14, 2006
    Date of Patent: April 29, 2008
    Assignee: AMO Manufacturing USA, LLC
    Inventors: Dimitri Chernyak, Charles E. Campbell, Erik Gross, Seema Somani, Guangming Dai
  • Patent number: 7338165
    Abstract: Methods, devices, and systems for predicting an optical acuity measure of an optical system of an eye. An optical acuity measure can be predicted by determining a point spread function based on a wavefront measurement of an eye, convolving a resolution target with the point spread function to produce an image, and predicting the optical acuity measure of the optical system of the eye based on the image.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: March 4, 2008
    Assignee: VISX, Incorporated
    Inventor: Guangming Dai
  • Patent number: 7331674
    Abstract: Systems, methods, and devices for determining an optical surface model for an optical tissue system of an eye are provided. Techniques include inputting a Fourier transform of optical data from the optical tissue system, inputting a conjugate Fourier transform of a basis function surface, determining a Fourier domain sum of the Fourier transform and the conjugate Fourier transform, calculating an estimated basis function coefficient based on the Fourier domain sum, and determining the optical surface model based on the estimated basis function coefficient. The approach is well suited for employing Fourier transform in wavefront reconstruction using Zernike representation.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: February 19, 2008
    Assignee: VISX, Incorporated
    Inventor: Guangming Dai
  • Patent number: 7320517
    Abstract: Methods, devices, and systems establish an optical surface shape that mitigates or treats a vision condition in a patient. An optical surface shape for a particular patient can be determined using a set of patient parameters for the specific patient by using a compound modulation transfer function (CMTF). The compound modulation transfer function can include a combination of modulation transfer functions (MTF's) at a plurality of distinct frequencies.
    Type: Grant
    Filed: August 3, 2004
    Date of Patent: January 22, 2008
    Assignee: VISX, Incorporated
    Inventors: Guangming Dai, Kingman Yee
  • Patent number: 7296893
    Abstract: The present invention provides methods, systems and software for scaling optical aberration measurements of optical systems. In one embodiment, the present invention provides a method of reconstructing optical tissues of an eye. The method comprises transmitting an image through the optical tissues of the eye. Aberration data from the transmitted image is measured across the optical tissues of the eye at a first plane. A conversion algorithm is applied to the data, converting it to corrective optical power data that can be used as a basis for constructing a treatment for the eye at a second plane.
    Type: Grant
    Filed: January 7, 2005
    Date of Patent: November 20, 2007
    Assignee: VISX, Incorporated
    Inventor: Guangming Dai
  • Patent number: 7293873
    Abstract: Methods, devices, and systems establish an optical surface shape that mitigates or treats presbyopia in a particular patient. The combination of distance vision and near vision in a patient can be improved, often based on input patient parameters such as pupil size, residual accommodation, and power need. Iterative optimization may generate a customized corrective optical shape for the patient.
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: November 13, 2007
    Assignee: VISX, Incorporated
    Inventors: Guangming Dai, Kingman Yee
  • Publication number: 20070222948
    Abstract: Systems, methods, and devices for determining an aberration in an optical tissue system of an eye are provided. Techniques include inputting optical data from the optical tissue system of the eye, where the optical data includes set of local gradients corresponding to a non-circular shaped aperture, processing the optical data with an iterative Fourier transform to obtain a set of Fourier coefficients, converting the set of Fourier coefficients to a set of modified Zernike coefficients that are orthogonal over the non-circular shaped aperture, and determining the aberration in the optical tissue system of the eye based on the set of modified Zernike coefficients.
    Type: Application
    Filed: March 23, 2007
    Publication date: September 27, 2007
    Applicant: VISX, Incorporated
    Inventor: Guangming Dai
  • Publication number: 20070211214
    Abstract: The present invention provides methods, systems and software for scaling optical aberration measurements of optical systems. In one embodiment, the present invention provides a method of reconstructing optical tissues of an eye. The method comprises transmitting an image through the optical tissues of the eye. Aberration data from the transmitted image is measured across the optical tissues of the eye at a first plane. A conversion algorithm is applied to the data, converting it to corrective optical power data that can be used as a basis for constructing a treatment for the eye at a second plane.
    Type: Application
    Filed: April 17, 2007
    Publication date: September 13, 2007
    Applicant: VISX, Incorporated
    Inventor: Guangming Dai
  • Publication number: 20070091263
    Abstract: Methods, systems and software for determining an optical surface model for an optical tissue system using Fourier transformation algorithms. A method of reconstructing optical tissues of an eye comprises transmitting an image through the optical tissues of the eye. The surface gradients from the transmitted image are measured across the optical tissues of the eye. A Fourier transform algorithm is applied to the surface gradients to reconstruct an optical surface model that corresponds to the optical tissues of the eye.
    Type: Application
    Filed: December 14, 2006
    Publication date: April 26, 2007
    Applicant: VISX, INCORPORATED
    Inventors: Dimitri Chernyak, Charles Campbell, Erik Gross, Seema Somani, Guangming Dai
  • Publication number: 20070058132
    Abstract: Systems, methods, and devices for determining an optical surface model for an optical tissue system of an eye are provided. Techniques include inputting a Fourier transform of optical data from the optical tissue system, inputting a conjugate Fourier transform of a basis function surface, determining a Fourier domain sum of the Fourier transform and the conjugate Fourier transform, calculating an estimated basis function coefficient based on the Fourier domain sum, and determining the optical surface model based on the estimated basis function coefficient. The approach is well suited for employing Fourier transform in wavefront reconstruction using Zernike representation.
    Type: Application
    Filed: September 2, 2005
    Publication date: March 15, 2007
    Applicant: VISX, Incorporated
    Inventor: Guangming Dai
  • Patent number: 7168807
    Abstract: Methods, systems and software for determine an optical surface model for an optical tissue system using Fourier transformation algorithms. A method of reconstructing optical tissues of an eye comprises transmitting an image through the optical tissues of the eye. The surface gradients from the transmitted image are measured across the optical tissues of the eye. A Fourier transform algorithm is applied to the surface gradients to reconstruct an optical surface model that corresponds to the optical tissues of the eye.
    Type: Grant
    Filed: June 17, 2004
    Date of Patent: January 30, 2007
    Assignee: VISX, Incorporated
    Inventors: Dimitri Chernyak, Charles E. Campbell, Erik Gross, Seema Somani, Guangming Dai
  • Publication number: 20060173644
    Abstract: Computer systems, programs, and methods can advantageously be used to process optical data. These approaches often involve modifying a first format data to a second format data, and are useful in simplifying the complications due to data from different wavefront systems, different aberrometer devices and aberrometer software versions, different clinical studies and different measurement conditions. A centralized database system can be used effectively in a clinical research setting, which can be a medical center, a college, or a research department in a company, or in other diagnosis or treatment facilities.
    Type: Application
    Filed: January 12, 2006
    Publication date: August 3, 2006
    Applicant: VISX, Incorporated
    Inventors: Guangming Dai, Kingman Yee, Dimitri Chernyak
  • Publication number: 20060017883
    Abstract: Devices, systems, and methods measure, diagnose, and/or treat one or both eyes of a patient. Adaptive optics systems (such as those having a deformable mirror) may be configured to an aspherical or multi-spherical presbyopia-mitigating prescriptive shape to allow objective and/or subjective measurements of a candidate prescription. A plurality of viewing distances allow subjective and/or objective evaluations of performance using a light spot or a test viewing image. Measurements of aberrations at selected viewing conditions (including distances and/or brightness) with correlating pupil sizes may also be provided. Wavefront measurement systems and methods may help position and isolate the eye from ambient light.
    Type: Application
    Filed: June 17, 2005
    Publication date: January 26, 2006
    Applicant: VISX, Incorporated
    Inventors: Guangming Dai, Seema Somani
  • Publication number: 20050280777
    Abstract: Devices, systems, and methods measure, diagnose, and/or treat one or both eyes of a patient. Adaptive optics systems (such as those having a deformable mirror) may be configured to an aspherical or multi-spherical presbyopia-mitigating prescriptive shape to allow objective and/or subjective measurements of a candidate prescription. A plurality of viewing distances allow subjective and/or objective evaluations of performance using a light spot or a test viewing image. Measurements of aberrations at selected viewing conditions (including distances and/or brightness) with correlating pupil sizes may also be provided.
    Type: Application
    Filed: June 17, 2004
    Publication date: December 22, 2005
    Applicant: VISX, Incorporated
    Inventor: Guangming Dai
  • Publication number: 20050270491
    Abstract: Methods, devices, and systems establish an optical surface shape that mitigates or treats presbyopia in a particular patient. The combination of distance vision and near vision in a patient can be improved, often based on input patient parameters such as pupil size, residual accommodation, and power need. Iterative optimization may generate a customized corrective optical shape for the patient. Threshold residual accommodation is established for presbyopia treatment.
    Type: Application
    Filed: May 19, 2005
    Publication date: December 8, 2005
    Applicant: VISX, Incorporated
    Inventors: Guangming Dai, Kingman Yee
  • Publication number: 20050254006
    Abstract: Methods, devices, and systems establish an optical surface shape that mitigates or treats a vision condition in a patient. An optical surface shape for a particular patient can be determined using a set of patient parameters for the specific patient by using a compound modulation transfer function (CMTF). The compound modulation transfer function can include a combination of modulation transfer functions (MTF's) at a plurality of distinct frequencies.
    Type: Application
    Filed: August 3, 2004
    Publication date: November 17, 2005
    Applicant: VISX, Incorporated
    Inventors: Guangming Dai, Kingman Yee
  • Publication number: 20050213040
    Abstract: Systems and methods analyze, diagnose, and/or treat a patient's eye using modified forms of the point spread function (“PSF”) tailored to the vision system. Factors that alter perception of visual aberrations can be included and/or volumetric point spread functions calculated, often using point spread function calculations throughout a range of optical distances to more fully indicate the variation in visual perception of optics at different distances. A variety of visual affects of the human optical system can be simulated, analyzed, and modeled, including: single versus multiple wavelength sources, chromatic aberrations, retinal resolution, wavelength-dependent visual response, Stiles-Crawford effects, and/or non-linearity of retinal response.
    Type: Application
    Filed: February 22, 2005
    Publication date: September 29, 2005
    Applicant: VISX, Incorporated
    Inventors: Erik Gross, Guangming Dai, Charles Campbell
  • Publication number: 20050195364
    Abstract: The present invention provides methods, systems and software for scaling optical aberration measurements of optical systems. In one embodiment, the present invention provides a method of reconstructing optical tissues of an eye. The method comprises transmitting an image through the optical tissues of the eye. Aberration data from the transmitted image is measured across the optical tissues of the eye at a first plane. A conversion algorithm is applied to the data, converting it to corrective optical power data that can be used as a basis for constructing a treatment for the eye at a second plane.
    Type: Application
    Filed: January 7, 2005
    Publication date: September 8, 2005
    Applicant: VISX, Incorporated
    Inventor: Guangming Dai
  • Publication number: 20050096640
    Abstract: Optical correction methods, devices, and systems reduce optical aberrations or inhibit refractive surgery induced aberrations. Error source control and adjustment or optimization of ablation profiles or other optical data address high order aberrations. A simulation approach identifies and characterizes system factors that can contribute to, or that can be adjusted to inhibit, optical aberrations. Modeling effects of system components facilitates adjustment of the system parameters.
    Type: Application
    Filed: December 20, 2004
    Publication date: May 5, 2005
    Applicant: VISX, Incorporated
    Inventors: Guangming Dai, Junzhong Liang
  • Publication number: 20050024585
    Abstract: Methods, devices, and systems for predicting an optical acuity measure of an optical system of an eye. An optical acuity measure can be predicted by determining a point spread function based on a wavefront measurement of an eye, convolving a resolution target with the point spread function to produce an image, and predicting the optical acuity measure of the optical system of the eye based on the image.
    Type: Application
    Filed: June 18, 2004
    Publication date: February 3, 2005
    Applicant: VISX, Incorporated
    Inventor: Guangming Dai