Patents by Inventor Babak Robert Raj
Babak Robert Raj 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: 11105612Abstract: The hybrid measurement system includes an evanescent prism coupling spectroscopy (EPCS) sub-system and a light-scattering polarimetry (LSP) sub-system. The EPCS sub-system includes an EPCS light source optically coupled to an EPCS detector system through an EPCS coupling prism. The LSP sub-system includes an LSP light source optically coupled to an optical compensator, which in turn is optically coupled to a LSP detector system via a LSP coupling prism. A support structure supports the EPCS and LSP coupling prisms to define a coupling prism assembly, which supports the two prisms at a measurement location. Stress measurements made using the EPCS and LSP sub-systems are combined to fully characterize the stress properties of a transparent chemically strengthened substrate. Methods of processing the EPCS and LSP measurements to improve measurement accuracy are also disclosed.Type: GrantFiled: March 20, 2020Date of Patent: August 31, 2021Assignee: Corning IncorporatedInventors: Ryan Claude Andrews, Pierre Michel Bouzi, William John Furnas, Jeremiah Robert Jacobson, Glenn Abram Newcomer, Evan Lewis Olson, Babak Robert Raj, Rostislav Vatchev Roussev, Viktor Stepanov, Nathaniel David Wetmore
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Publication number: 20210157038Abstract: The prism-coupling systems and methods include using a prism-coupling system to collect initial TM and TE mode spectra of a chemically strengthened article having a refractive index profile with a near-surface spike region and a deep region. The prism-coupling system has a light source configured to generate sequential measurement light beams or reflected light beams having different measurement wavelengths. The different measurement wavelengths generate different TM and TE mode spectra. The light source can include multiple light-emitting elements and optical filters or a broadband light source and optical filters. The optical filters can be sequentially inserted into either the input optical path or the output optical path of the prism-coupling system.Type: ApplicationFiled: November 25, 2020Publication date: May 27, 2021Inventors: Ryan Claude Andrews, Pierre Michel Bouzi, Zhenhua Guo, Jacob Immerman, Jeremiah Robert Jacobson, Michael David Moon, Babak Robert Raj, Nathaniel David Wetmore, Xiupu Wang
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Publication number: 20200300615Abstract: The hybrid measurement system includes an evanescent prism coupling spectroscopy (EPCS) sub-system and a light-scattering polarimetry (LSP) sub-system. The EPCS sub-system includes an EPCS light source optically coupled to an EPCS detector system through an EPCS coupling prism. The LSP sub-system includes an LSP light source optically coupled to an optical compensator, which in turn is optically coupled to a LSP detector system via a LSP coupling prism. A support structure supports the EPCS and LSP coupling prisms to define a coupling prism assembly, which supports the two prisms at a measurement location. Stress measurements made using the EPCS and LSP sub-systems are combined to fully characterize the stress properties of a transparent chemically strengthened substrate. Methods of processing the EPCS and LSP measurements to improve measurement accuracy are also disclosed.Type: ApplicationFiled: March 20, 2020Publication date: September 24, 2020Inventors: Ryan Claude Andrews, Pierre Michel Bouzi, William John Furnas, Jeremiah Robert Jacobson, Glenn Abram Newcomer, Evan Lewis Olson, Babak Robert Raj, Rostislav Vatchev Roussev, Viktor Stepanov, Nathaniel David Wetmore
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Patent number: 9038439Abstract: Methods of testing a honeycomb filter include the step of wetting the outer peripheral surface of the honeycomb filter to enhance the flow of fog through outer peripheral channels of the honeycomb network of channels. In further examples, methods include the step of obstructing a flow of fog through inner peripheral channels to enhance the flow of fog through the outer peripheral channels of the honeycomb network of channels. In further examples, apparatus for testing a honeycomb filter include a flow diverter with a blocking member.Type: GrantFiled: November 28, 2012Date of Patent: May 26, 2015Assignee: Corning IncorporatedInventors: Joseph Henry Citriniti, John Deane Madison, Thomas John McGeorge, Babak Robert Raj
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Publication number: 20140335764Abstract: The present invention is directed to an apparatus for grinding or polishing at least one edge of a glass substrate. The apparatus includes a grinding unit configured to remove a predetermined amount of material from the edge when in an aligned position. The grinding unit applies a predetermined force normal to the edge. An air bearing slide system is coupled to the grinding unit. The air bearing slide system is configured to slide along a predetermined axis on a thin film of pressurized air that provides a zero friction load bearing interface. A linear actuation motor is coupled to the air bearing slide system. The linear actuation motor is configured to control the movement of the air bearing slide system such that the grinding unit is moved from a non-aligned position to the aligned position.Type: ApplicationFiled: July 22, 2014Publication date: November 13, 2014Inventors: James William Brown, Babak Robert Raj
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Patent number: 8814633Abstract: The present invention is directed to an apparatus for grinding or polishing at least one edge of a glass substrate. The apparatus includes a grinding unit configured to remove a predetermined amount of material from the edge when in an aligned position. The grinding unit applies a predetermined force normal to the edge. An air bearing slide system is coupled to the grinding unit. The air bearing slide system is configured to slide along a predetermined axis on a thin film of pressurized air that provides a zero friction load bearing interface. A linear actuation motor is coupled to the air bearing slide system. The linear actuation motor is configured to control the movement of the air bearing slide system such that the grinding unit is moved from a non-aligned position to the aligned position.Type: GrantFiled: October 4, 2013Date of Patent: August 26, 2014Assignee: Corning IncorporatedInventors: James William Brown, Babak Robert Raj
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Publication number: 20140144213Abstract: Methods of testing a honeycomb filter include the step of wetting the outer peripheral surface of the honeycomb filter to enhance the flow of fog through outer peripheral channels of the honeycomb network of channels. In further examples, methods include the step of obstructing a flow of fog through inner peripheral channels to enhance the flow of fog through the outer peripheral channels of the honeycomb network of channels. In further examples, apparatus for testing a honeycomb filter include a flow diverter with a blocking member.Type: ApplicationFiled: November 28, 2012Publication date: May 29, 2014Inventors: Joseph Henry Citriniti, John Deane Madison, Thomas John McGeorge, Babak Robert Raj
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Publication number: 20140030959Abstract: The present invention is directed to an apparatus for grinding or polishing at least one edge of a glass substrate. The apparatus includes a grinding unit configured to remove a predetermined amount of material from the edge when in an aligned position. The grinding unit applies a predetermined force normal to the edge. An air bearing slide system is coupled to the grinding unit. The air bearing slide system is configured to slide along a predetermined axis on a thin film of pressurized air that provides a zero friction load bearing interface. A linear actuation motor is coupled to the air bearing slide system. The linear actuation motor is configured to control the movement of the air bearing slide system such that the grinding unit is moved from a non-aligned position to the aligned position.Type: ApplicationFiled: October 4, 2013Publication date: January 30, 2014Applicant: Corning IncorporatedInventors: James William Brown, Babak Robert Raj
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Patent number: 8585467Abstract: The present invention is directed to an apparatus for grinding or polishing at least one edge of a glass substrate. The apparatus includes a grinding unit configured to remove a predetermined amount of material from the edge when in an aligned position. The grinding unit applies a predetermined force normal to the edge. An air bearing slide system is coupled to the grinding unit. The air bearing slide system is configured to slide along a predetermined axis on a thin film of pressurized air that provides a zero friction load bearing interface. A linear actuation motor is coupled to the air bearing slide system. The linear actuation motor is configured to control the movement of the air bearing slide system such that the grinding unit is moved from a non-aligned position to the aligned position.Type: GrantFiled: October 20, 2009Date of Patent: November 19, 2013Assignee: Corning IncorporatedInventors: James William Brown, Babak Robert Raj
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Publication number: 20100112910Abstract: The present invention is directed to an apparatus for grinding or polishing at least one edge of a glass substrate. The apparatus includes a grinding unit configured to remove a predetermined amount of material from the edge when in an aligned position. The grinding unit applies a predetermined force normal to the edge. An air bearing slide system is coupled to the grinding unit. The air bearing slide system is configured to slide along a predetermined axis on a thin film of pressurized air that provides a zero friction load bearing interface. A linear actuation motor is coupled to the air bearing slide system. The linear actuation motor is configured to control the movement of the air bearing slide system such that the grinding unit is moved from a non-aligned position to the aligned position.Type: ApplicationFiled: October 20, 2009Publication date: May 6, 2010Inventors: James William Brown, Babak Robert Raj
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Patent number: 7701570Abstract: A system and method for detecting defective cells in honeycomb bodies which includes a light source which launches and couples light into cells at a first end face of the honeycomb body, and a projection medium which receives the light at a second end face of the honeycomb body. The light source is preferably a collimated light source.Type: GrantFiled: December 12, 2005Date of Patent: April 20, 2010Assignee: Corning IncorporatedInventors: Patrick Michael Gargano, Babak Robert Raj, William Paul Ryszytiwskyj, John Charles Speeckaert, David John Worthey
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Patent number: 7674309Abstract: A apparatus and method for detecting defects in a honeycomb body. In operation, the particulates emerge at an outlet end face of the honeycomb body through defects, if any, in the honeycomb walls and/or plugs and passes though a permeable member, such as a screen, where they are illuminated. The permeable member is disposed adjacent to and preferably in contact with the outlet end. Use of the permeable member improves the signal-to-noise ratio (SNR) such that defects may be more readily detected. The permeable member preferably includes an anti-reflective surface.Type: GrantFiled: March 31, 2006Date of Patent: March 9, 2010Assignee: Corning IncorporatedInventors: Patrick Michael Gargano, Babak Robert Raj, William Paul Ryszytiwskyj, John Charles Speeckaert, David John Worthey
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Patent number: 7648549Abstract: A system, apparatus and method for detecting defects in a honeycomb body. The system and apparatus include a fixture adapted to hold the honeycomb body, a particulate fluid source, a pipe which defines a flow path between the particulate fluid source and a first end face of the honeycomb body thereby allowing particulate fluid to flow from the particulate fluid source to the first end face of the honeycomb body. The particulate fluid emerges at a second end face of the honeycomb body through defects, if any, in the honeycomb body where the positions of such defects may be monitored. The system and apparatus includes a flow straightener disposed in the flow path to minimize boundary layer influence of the pipe on the flow of the particulate fluid. A substantially uniform velocity flow profile is provided to the first end face of the honeycomb body.Type: GrantFiled: July 28, 2006Date of Patent: January 19, 2010Assignee: Corning IncorporatedInventors: Patrick Michael Gargano, Babak Robert Raj, William Paul Ryszytiwskyj, Michael George Shultz, David John Worthey, Leon Robert Zoeller, III
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Publication number: 20090092472Abstract: A method of conveying a glass substrate utilizing an improved non-contact lifting device. The non-contact lifting device employs the Bernoulli effect to create a pressure differential across the glass substrate. The Bernoulli device of the present invention comprises an increased holding or lifting power, and reduces the opportunity for contact between the device and the glass substrate if the device is tilted with respect the plane of the glass substrate surface.Type: ApplicationFiled: May 27, 2008Publication date: April 9, 2009Inventors: Weiwei Luo, Samuel Odei Owusu, Ye Guang Pan, Babak Robert Raj, Yawei Sun, Naiyue Zhou
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Patent number: 7410528Abstract: A method for testing integrity of a plugged honeycomb structure includes forming a condenser at a first end of the honeycomb structure, passing a vaporous stream into a second end of the honeycomb structure, wherein a column of the vaporous stream emerges at the first end of the honeycomb structure from cells in the honeycomb structure that are defective, and observing the first end of the honeycomb structure for condensation spots formed by contact between the column of the vaporous stream emerging at the first end of the honeycomb structure and the condenser. An apparatus for accomplishing the method is also disclosed.Type: GrantFiled: November 22, 2005Date of Patent: August 12, 2008Assignee: Corning IncorporatedInventors: Ian Frederick Rae, Babak Robert Raj, William Paul Ryszytiwskyj, David John Worthey, Leon Robert Zoeller, III