Patents by Inventor Dharmendra Jani

Dharmendra Jani 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: 20210128294
    Abstract: An optical device comprising an optical hydrogel with select regions that have been irradiated with laser light having a pulse energy from 0.01 nJ to 50 nJ and a wavelength from 600 nm to 900 nm. The irradiated regions are characterized by a positive change in refractive index of from 0.01 to 0.06, and exhibit little or no scattering loss. The optical hydrogel is prepared with a hydrophilic monomer.
    Type: Application
    Filed: January 15, 2021
    Publication date: May 6, 2021
    Inventors: Wayne H. Knox, Li Ding, Jay F. Kunzler, Dharmendra Jani
  • Patent number: 10893936
    Abstract: An optical device comprising an optical hydrogel with select regions that have been irradiated with laser light having a pulse energy from 0.01 nJ to 50 nJ and a wavelength from 600 nm to 900 nm. The irradiated regions are characterized by a positive change in refractive index of from 0.01 to 0.06, and exhibit little or no scattering loss. The optical hydrogel is prepared with a hydrophilic monomer.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: January 19, 2021
    Assignee: University of Rochester
    Inventors: Wayne H. Knox, Li Ding, Jay F. Kunzler, Dharmendra Jani
  • Patent number: 10649115
    Abstract: A method for modifying the refractive index of an optical polymeric material. The method comprises continuously irradiating predetermined regions of an optical, polymeric material with femtosecond laser pulses to form a gradient index refractive structure within the material. The optical polymeric material can include a photosensitizer to increase the photoefficiency of the two-photo process resulting in the formation of the observed refractive structures. An optical device includes an optical, polymeric lens material having an anterior surface and posterior surface and an optical axis intersecting the surfaces and at least one laser-modified, GRIN layer disposed between the anterior surface and the posterior surface and arranged along a first axis 45° to 90° to the optical axis.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: May 12, 2020
    Assignee: University of Rochester
    Inventors: Wayne H. Knox, Dharmendra Jani, Li Ding
  • Publication number: 20190240002
    Abstract: An optical device comprising an optical hydrogel with select regions that have been irradiated with laser light having a pulse energy from 0.01 nJ to 50 nJ and a wavelength from 600 nm to 900 nm. The irradiated regions are characterized by a positive change in refractive index of from 0.01 to 0.06, and exhibit little or no scattering loss. The optical hydrogel is prepared with a hydrophilic monomer.
    Type: Application
    Filed: April 19, 2019
    Publication date: August 8, 2019
    Inventors: Wayne H. Knox, Li Ding, Jay F. Kunzler, Dharmendra Jani
  • Patent number: 10299909
    Abstract: An optical device comprising an optical hydrogel with select regions that have been irradiated with laser light having a pulse energy from 0.01 nJ to 50 nJ and a wavelength from 600 nm to 900 nm. The irradiated regions are characterized by a positive change in refractive index of from 0.01 to 0.06, and exhibit little or no scattering loss. The optical hydrogel is prepared with a hydrophilic monomer.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: May 28, 2019
    Assignee: University of Rochester
    Inventors: Wayne H. Knox, Li Ding, Jay F. Kunzler, Dharmendra Jani
  • Publication number: 20180231696
    Abstract: A method for modifying the refractive index of an optical polymeric material. The method comprises continuously irradiating predetermined regions of an optical, polymeric material with femtosecond laser pulses to form a gradient index refractive structure within the material. The optical polymeric material can include a photosensitizer to increase the photoefficiency of the two-photo process resulting in the formation of the observed refractive structures. An optical device includes an optical, polymeric lens material having an anterior surface and posterior surface and an optical axis intersecting the surfaces and at least one laser-modified, GRIN layer disposed between the anterior surface and the posterior surface and arranged along a first axis 45° to 90° to the optical axis.
    Type: Application
    Filed: April 5, 2018
    Publication date: August 16, 2018
    Inventors: Wayne H. Knox, Dharmendra Jani, Li Ding
  • Patent number: 9939558
    Abstract: A method for modifying the refractive index of an optical polymeric material. The method comprises continuously irradiating predetermined regions of an optical, polymeric material with femtosecond laser pulses to form a gradient index refractive structure within the material. The optical polymeric material can include a photosensitizer to increase the photoefficiency of the two-photo process resulting in the formation of the observed refractive structures. An optical device includes an optical, polymeric lens material having an anterior surface and posterior surface and an optical axis intersecting the surfaces and at least one laser-modified, GRIN layer disposed between the anterior surface and the posterior surface and arranged along a first axis 45° to 90° to the optical axis.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: April 10, 2018
    Assignee: University of Rochester
    Inventors: Wayne H. Knox, Dharmendra Jani, Li Ding
  • Publication number: 20170181846
    Abstract: An optical device comprising an optical hydrogel with select regions that have been irradiated with laser light having a pulse energy from 0.01 nJ to 50 nJ and a wavelength from 600 nm to 900 nm. The irradiated regions are characterized by a positive change in refractive index of from 0.01 to 0.06, and exhibit little or no scattering loss. The optical hydrogel is prepared with a hydrophilic monomer.
    Type: Application
    Filed: March 10, 2017
    Publication date: June 29, 2017
    Inventors: Wayne H. Knox, Li Ding, Jay F. Kunzler, Dharmendra Jani
  • Patent number: 9622912
    Abstract: An optical device comprising an optical hydrogel with select regions that have been irradiated with laser light having a pulse energy from 0.01 nJ to 50 nJ and a wavelength from 600 nm to 900 nm. The irradiated regions are characterized by a positive change in refractive index of from 0.01 to 0.06, and exhibit little or no scattering loss. The optical hydrogel is prepared with a hydrophilic monomer.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: April 18, 2017
    Assignee: University of Rochester
    Inventors: Wayne H. Knox, Li Ding, Jay F. Kunzler, Dharmendra Jani
  • Publication number: 20150378065
    Abstract: A method for modifying the refractive index of an optical polymeric material. The method comprises continuously irradiating predetermined regions of an optical, polymeric material with femtosecond laser pulses to form a gradient index refractive structure within the material. The optical polymeric material can include a photosensitizer to increase the photoefficiency of the two-photo process resulting in the formation of the observed refractive structures. An optical device includes an optical, polymeric lens material having an anterior surface and posterior surface and an optical axis intersecting the surfaces and at least one laser-modified, GRIN layer disposed between the anterior surface and the posterior surface and arranged along a first axis 45° to 90° to the optical axis.
    Type: Application
    Filed: September 9, 2015
    Publication date: December 31, 2015
    Inventors: Wayne H. Knox, Dharmendra Jani, Li Ding
  • Patent number: 9144491
    Abstract: A method for modifying the refractive index of an optical polymeric material. The method comprises continuously irradiating predetermined regions of an optical, polymeric material with femtosecond laser pulses to form a gradient index refractive structure within the material. An optical device includes an optical, polymeric lens material having an anterior surface and posterior surface and an optical axis intersecting the surfaces and at least one laser-modified, GRIN layer disposed between the anterior surface and the posterior surface and arranged along a first axis 45° to 90° to the optical axis, and further characterized by a variation in index of refraction across at least one of at least a portion of the adjacent segments and along each segment.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: September 29, 2015
    Assignee: University of Rochester
    Inventors: Wayne H. Knox, Dharmendra Jani, Li Ding
  • Patent number: 9060847
    Abstract: A method for modifying the refractive index of an optical, hydrogel polymeric material. The method comprises irradiating predetermined regions of an optical, polymeric material with a laser to form refractive structures. To facilitate the formation of the refractive structures the optical, hydrogel polymeric material comprises a photosensitizer. The presence of the photosensitizer permits one to set a scan rate to a value that is at least fifty times greater than a scan rate without the photosensitizer in the material, yet provides similar refractive structures in terms of the observed change in refractive index. Alternatively, the photosensitizer in the polymeric material permits one to set an average laser power to a value that is at least two times less than an average laser power without the photosensitizer in the material, yet provide similar refractive structures.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: June 23, 2015
    Assignees: University of Rochester, Rochester Institute of Technology
    Inventors: Thomas Smith, Wayne H. Knox, Li Ding, Dharmendra Jani, Jeffrey G. Linhardt
  • Publication number: 20150126979
    Abstract: An optical device comprising an optical hydrogel with select regions that have been irradiated with laser light having a pulse energy from 0.01 nJ to 50 nJ and a wavelength from 600 nm to 900 nm. The irradiated regions are characterized by a positive change in refractive index of from 0.01 to 0.06, and exhibit little or no scattering loss. The optical hydrogel is prepared with a hydrophilic monomer.
    Type: Application
    Filed: December 9, 2014
    Publication date: May 7, 2015
    Inventors: Wayne H. Knox, Li Ding, Jay F. Kunzler, Dharmendra Jani
  • Patent number: 8932352
    Abstract: An optical device comprising an optical hydrogel with select regions that have been irradiated with laser light having a pulse energy from 0.01 nJ to 50 nJ and a wavelength from 600 nm to 900 nm. The irradiated regions are characterized by a positive change in refractive index of from 0.01 to 0.06, and exhibit little or no scattering loss. The optical hydrogel is prepared with a hydrophilic monomer.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: January 13, 2015
    Assignee: University of Rochester
    Inventors: Wayne H. Knox, Li Ding, Jay F. Kunzler, Dharmendra Jani
  • Patent number: 8901190
    Abstract: A method for modifying the refractive index of an optical, hydrogel polymeric material. The method comprises irradiating predetermined regions of an optical, polymeric material with a laser to form refractive structures. To facilitate the formation of the refractive structures the optical, hydrogel polymeric material comprises a photosensitizer. The presence of the photosensitizer permits one to set a scan rate to a value that is at least fifty times greater than a scan rate without the photosensitizer in the material, yet provides similar refractive structures in terms of the observed change in refractive index. Alternatively, the photosensitizer in the polymeric material permits one to set an average laser power to a value that is at least two times less than an average laser power without the photosensitizer in the material, yet provide similar refractive structures.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: December 2, 2014
    Assignees: University of Rochester, Rochester Institute of Technology
    Inventors: Thomas Smith, Wayne H. Knox, Li Ding, Dharmendra Jani, Jeffrey G. Linhardt
  • Publication number: 20130268072
    Abstract: A method for modifying the refractive index of an optical, hydrogel polymeric material. The method comprises irradiating predetermined regions of an optical, polymeric material with a laser to form refractive structures. To facilitate the formation of the refractive structures the optical, hydrogel polymeric material comprises a photosensitizer. The presence of the photosensitizer permits one to set a scan rate to a value that is at least fifty times greater than a scan rate without the photosensitizer in the material, yet provides similar refractive structures in terms of the observed change in refractive index. Alternatively, the photosensitizer in the polymeric material permits one to set an average laser power to a value that is at least two times less than an average laser power without the photosensitizer in the material, yet provide similar refractive structures.
    Type: Application
    Filed: September 27, 2012
    Publication date: October 10, 2013
    Inventors: Thomas Smith, Wayne H. Knox, Li Ding, Dharmendra Jani, Jeffrey G. Linhardt
  • Publication number: 20130138093
    Abstract: An optical device comprising an optical hydrogel with select regions that have been irradiated with laser light having a pulse energy from 0.01 nJ to 50 nJ and a wavelength from 600 nm to 900 nm. The irradiated regions are characterized by a positive change in refractive index of from 0.01 to 0.06, and exhibit little or no scattering loss. The optical hydrogel is prepared with a hydrophilic monomer.
    Type: Application
    Filed: November 28, 2012
    Publication date: May 30, 2013
    Applicants: University of Rochester, Bausch & Lomb Incorporated
    Inventors: Wayne H. Knox, Li Ding, Jay F. Kunzler, Dharmendra Jani, Candido D. Pinto
  • Publication number: 20120310340
    Abstract: A method for modifying the refractive index of an optical polymeric material. The method comprises continuously irradiating predetermined regions of an optical, polymeric material with femtosecond laser pulses to form a gradient index refractive structure within the material. An optical device includes an optical, polymeric lens material having an anterior surface and posterior surface and an optical axis intersecting the surfaces and at least one laser-modified, GRIN layer disposed between the anterior surface and the posterior surface and arranged along a first axis 45° to 90° to the optical axis, and further characterized by a variation in index of refraction across at least one of at least a portion of the adjacent segments and along each segment.
    Type: Application
    Filed: September 21, 2011
    Publication date: December 6, 2012
    Inventors: Wayne H. Knox, Thomas Smith, Dharmendra Jani, Li Ding
  • Publication number: 20100298933
    Abstract: The invention is directed to an optical device comprising refractive optical structures, wherein the refractive structures are characterized by a change in refractive index, exhibit little or no scattering loss, and exhibit no significant differences in the Raman spectrum with respect to the non-irradiated optical, polymeric material.
    Type: Application
    Filed: July 30, 2010
    Publication date: November 25, 2010
    Inventors: Wayne H. Knox, Li Ding, Jay F. Kunzler, Dharmendra Jani, Candido D. Pinto
  • Publication number: 20100256651
    Abstract: An IOL injector that includes one or more polymeric portions that include a hydrophilic coating component that is effective to facilitate the passage of the IOL through the injector, particularly an injector tip. The IOL injector is prepared by a process that includes irradiating at least a portion of a polymeric, IOL injector with UV light in an environment comprising oxygen to provide a positive percent change in the atomic oxygen content of the polymer material at the surface as determined by X-ray Photoelectron Spectroscopy (XPS). A portion or the entire irradiated portion is then contacted with a solution comprising a hydrophilic coating component. The hydrophilic coating component is selected from a hydrophilic polymer, a hydrophilic copolymer or any one mixture thereof to provide a solution coated portion.
    Type: Application
    Filed: April 5, 2010
    Publication date: October 7, 2010
    Inventors: Dharmendra Jani, Kaustubh S. Chitre