Patents by Inventor Charles Hoke
Charles Hoke 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: 11300773Abstract: An apparatus and method for generating a mid-infrared region image of a specimen are disclosed. The apparatus includes a mid-infrared region laser that generates a first light beam, and a stage adapted to carry a specimen to be scanned. An optical assembly focuses the first light beam to a point on the specimen. A first light detector measures a first intensity of light leaving the point on the specimen. A stage actuator assembly causes the specimen to move relative to the point in two dimensions. A controller forms a mid-infrared region image from the first intensity. The image can be based on reflected or transmitted light. The maximum size of the imaged area is determined by a scanning assembly that moves in a first direction relative to the stage, the stage moving in a direction orthogonal to the first direction.Type: GrantFiled: September 29, 2014Date of Patent: April 12, 2022Assignee: Agilent Technologies, Inc.Inventors: Charles Hoke, Varun Raghunathan
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Patent number: 11060914Abstract: An ATR scanner and method for calibrating the same are disclosed. The scanner includes an ATR objective having a reflecting face and an optical port adapted to receive a first light beam, and to focus the first light beam to a point, at a location on the reflecting face such that the first light beam is reflected by the reflecting face and no portion of the first light beam strikes the reflecting face at an angle greater than the critical angle. A detector measures an intensity of light reflected from the reflecting face. A controller controls the location of the focal point and determines an intensity of light that was incident on the reflecting face as a function of the position on the reflecting face and an intensity of light that was reflected from the reflecting face as a function of position on the reflecting face.Type: GrantFiled: September 30, 2018Date of Patent: July 13, 2021Assignee: AGILENT TECHNOLOGIES, INC.Inventors: Christopher Ryan Moon, Charles Hoke
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Publication number: 20200103278Abstract: An ATR scanner and method for calibrating the same are disclosed. The scanner includes an ATR objective having a reflecting face and an optical port adapted to receive a first light beam, and to focus the first light beam to a point, at a location on the reflecting face such that the first light beam is reflected by the reflecting face and no portion of the first light beam strikes the reflecting face at an angle greater than the critical angle. A detector measures an intensity of light reflected from the reflecting face. A controller controls the location of the focal point and determines an intensity of light that was incident on the reflecting face as a function of the position on the reflecting face and an intensity of light that was reflected from the reflecting face as a function of position on the reflecting face.Type: ApplicationFiled: September 30, 2018Publication date: April 2, 2020Applicant: Agilent Technologies, Inc.Inventors: Christopher Ryan Moon, Charles Hoke
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Patent number: 10184835Abstract: An imaging scanner and a method for using the same are disclosed. The scanner includes a variable attenuator adapted to receive a light beam generated by a MIR laser and that generates an attenuated light beam therefrom characterized by an attenuation level. The scanner includes an optical assembly that focuses the attenuated light beam to a point on a specimen. A light detector measures an intensity of light leaving the point on the specimen, the light detector being characterized by a detector dynamic range. A controller forms a plurality of MIR images from the intensity as a function of position on the specimen, each of the plurality of MIR images being formed with a different level of attenuation of the light beam. The controller combines the plurality of MIR images to generate a combined MIR image having a dynamic range greater than the detector dynamic range.Type: GrantFiled: September 23, 2015Date of Patent: January 22, 2019Assignee: Agilent Technologies, Inc.Inventors: Charles Hoke, Christopher Ryan Moon, Andrew Ghetler, Yang Han
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Patent number: 9863877Abstract: A scanner and an attenuated total reflection (ATR) objective for use in such scanners are disclosed. The ATR objective includes first and second optical elements and an input port. The input port receives an input collimated light beam that is focused to a point on a planar face of the first optical element by the second optical element such that substantially all of that portion is reflected by the planar face and no portion of the input beam strikes the planar face at an angle less than the critical angle. The second optical element also generates an output collimated light beam from light reflected from the planar thce that is characterized by a central ray that is coincident with the central ray of the input collimated light beam. A light beam converter receives the first collimated light beam and generates the input collimated light beam therefrom.Type: GrantFiled: September 23, 2015Date of Patent: January 9, 2018Assignee: Agilent Technologies, Inc.Inventors: Charles Hoke, Christopher Ryan Moon, Andrew Ghetler, Yuri Beregovski, Richard P. Tella, Yang Han
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Publication number: 20170082490Abstract: An imaging scanner and a method for using the same are disclosed. The scanner includes a variable attenuator adapted to receive a light beam generated by a MIR laser and that generates an attenuated light beam therefrom characterized by an attenuation level. The scanner includes an optical assembly that focuses the attenuated light beam to a point on a specimen. A light detector measures an intensity of light leaving the point on the specimen, the light detector being characterized by a detector dynamic range. A controller forms a plurality of MIR images from the intensity as a function of position on the specimen, each of the plurality of MIR images being formed with a different level of attenuation of the light beam. The controller combines the plurality of MIR images to generate a combined MIR image having a dynamic range greater than the detector dynamic range.Type: ApplicationFiled: September 23, 2015Publication date: March 23, 2017Applicant: Agilent Technologies, Inc.Inventors: Charles Hoke, Christopher Ryan Moon, Andrew Ghetler, Yang Han
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Publication number: 20170082538Abstract: A scanner and an attenuated total reflection (ATR) objective for use in such scanners are disclosed The ATR objective includes first and second optical elements and an input port. The input port receives an input collimated light beam that is focused to a point on a planar face of the first optical element by the second optical element such that substantially all of that portion is reflected by the planar face and no portion of the input beam strikes the planar face at an angle greater than the critical angle. The second optical element also generates an output collimated light beam from light reflected from the planar face that is characterized by a central ray that is coincident with the central ray of the input collimated light beam. A light beam converter receives the first collimated light beam and generates the input collimated light beam therefrom.Type: ApplicationFiled: September 23, 2015Publication date: March 23, 2017Applicant: Agilent Technologies, Inc.Inventors: Charles Hoke, Christopher Ryan Moon, Andrew Ghetler, Yuri Beregovski, Richard P. Tella, Yang Han
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Publication number: 20160091704Abstract: An apparatus and method for generating a mid-infrared region image of a specimen are disclosed. The apparatus includes a mid-infrared region laser that generates a first light beam, and a stage adapted to carry a specimen to be scanned. An optical assembly focuses the first light beam to a point on the specimen. A first light detector measures a first intensity of light leaving the point on the specimen. A stage actuator assembly causes the specimen to move relative to the point in two dimensions. A controller forms a mid-infrared region image from the first intensity. The image can be based on reflected or transmitted light. The maximum size of the imaged area is determined by a scanning assembly that moves in a first direction relative to the stage, the stage moving in a direction orthogonal to the first direction.Type: ApplicationFiled: September 29, 2014Publication date: March 31, 2016Applicant: Agilent Technologies, Inc.Inventors: Charles Hoke, Varun Raghunathan
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Patent number: 9124068Abstract: An external cavity laser and method for operating same are disclosed. The external cavity laser includes a gain chip, a grating, an actuator and actuator driver. The grating diffracts light leaving the gain chip in a band of wavelengths back to the gain chip, the grating is characterized by an angle relative to light leaving the gain chip and distance from the gain chip, the angle and distance is controlled by the actuator. Part of the diffracted light is amplified by the gain chip. The actuator driver causes the angle to be dithered about an equilibrium angle in a motion characterized by an amplitude and average frequency. The amplitude of the dithering motion is chosen to either excite a plurality of adjacent laser modes of the gain chip or provide a servo signal for maintaining the grating angle at a target value.Type: GrantFiled: February 27, 2014Date of Patent: September 1, 2015Assignee: Agilent Technologies, Inc.Inventors: Miao Zhu, Charles Hoke
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Publication number: 20150244150Abstract: An external cavity laser and method for operating same are disclosed. The external cavity laser includes a gain chip, a grating, an actuator and actuator driver. The grating diffracts light leaving the gain chip in a band of wavelengths back to the gain chip, the grating is characterized by an angle relative to light leaving the gain chip and distance from the gain chip, the angle and distance is controlled by the actuator. Part of the diffracted light is amplified by the gain chip. The actuator driver causes the angle to be dithered about an equilibrium angle in a motion characterized by an amplitude and average frequency. The amplitude of the dithering motion is chosen to either excite a plurality of adjacent laser modes of the gain chip or provide a servo signal for maintaining the grating angle at a target value.Type: ApplicationFiled: February 27, 2014Publication date: August 27, 2015Applicant: Agilent Technologies, Inc.Inventors: Miao Zhu, Charles Hoke
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Patent number: 7602486Abstract: A vehicle cylinder head coolant passage inspection device and a method for inspecting vehicle cylinder head coolant passages therewith. A device and method of the present invention can be used to detect blockages present within such coolant passages. A device and method of the present invention uses one or more fiber-optic probes that can both emit and receive light. The probe(s) are used with a sensor that can register light reflected by a blockage and received by a probe(s) while in a coolant passage. Reflected light readings registered by the sensor can be used to determine whether a blockage is present.Type: GrantFiled: March 30, 2007Date of Patent: October 13, 2009Assignee: Honda Motor Co., Ltd.Inventors: Marc McDaniel, Charles Hoke, Chad J. Miller, Stephen A. Schumann
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Publication number: 20080239303Abstract: A vehicle cylinder head coolant passage inspection device and a method for inspecting vehicle cylinder head coolant passages therewith. A device and method of the present invention can be used to detect blockages present within such coolant passages. A device and method of the present invention uses one or more fiber-optic probes that can both emit and receive light. The probe(s) are used with a sensor that can register light reflected by a blockage and received by a probe(s) while in a coolant passage. Reflected light readings registered by the sensor can be used to determine whether a blockage is present.Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Applicant: Honda Motor Co., Ltd.Inventors: Marc McDaniel, Charles Hoke, Chad J. Miller, Stephen A. Schumann
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Patent number: 7272324Abstract: Methods for performing time-domain equalization of an information signal represented by an optical signal are provided. A representative method includes: receiving the optical signal; optically splitting the optical signal into beams; optically delaying at least one of the beams; detecting a plurality of the beams to generate respective electrical signal components; and combining a plurality of the electrical signal components to generate an electrical output signal representing the information signal. Systems and other methods also are provided.Type: GrantFiled: October 26, 2001Date of Patent: September 18, 2007Assignee: Avago Technologies Fiber IP (Singapore) Pte. Ltd.Inventors: Ken A. Nishimura, Brian E. Lemoff, Charles Hoke
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Publication number: 20070087015Abstract: The present invention provides vaccine compositions of attenuated dengue virus. More specifically, the attenuated virus is produced by serial passage in PDK cells. The invention also provides methods for stimulating the immune system of an individual to induce protection against all four dengue virus serotypes by administration of attenuated dengue-1, dengue-2, dengue-3, and dengue-4 virus.Type: ApplicationFiled: July 24, 2003Publication date: April 19, 2007Inventors: Kenneth Eckels, Joseph Putnak, Doria Dubois, Bruce Innis, Charles Hoke, Wellington Sun, Niranjan Kanesa-Thasan
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Publication number: 20060208652Abstract: First and second substrates are spaced apart and joined around a perimeter to define a gas chamber between the substrates. The first substrate is made of a material that transmits visible radiation. A layer of a phosphor material overlies an interior surface of one of the substrates and is capable of converting UV radiation to visible radiation. A layer of a reflective material overlies an interior surface of the other one of the substrates.Type: ApplicationFiled: March 17, 2005Publication date: September 21, 2006Inventors: Rene Helbing, Charles Hoke
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Publication number: 20060132442Abstract: Two or more spatial filters are used in determining velocity based on speckle translation. A light source may be turned on, turned off, or both for a variable amount of time during operation. The velocity may then be determined with trend identification, correlation, recursive frequency estimation, or measurement bandwidth variation. A confidence level may also be calculated for the measured velocity, and the measured velocity reported or used only when the calculated confidence level meets or exceeds a given value.Type: ApplicationFiled: December 17, 2004Publication date: June 22, 2006Inventors: Susan Hunter, Charles Hoke, Ramakrishna Kakarala, John Wenstrand
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Publication number: 20060097738Abstract: A universal fixture for testing a device, such as a bare printed circuit board, includes a plurality of addressable contact points. Each of the contact points includes a switch connected to a conductor capable of creating an electrical connection to the device. To obtain a measurement of a target on the device, two of the contact points on the universal fixture are selected based on the position of the target on the device relative to the contact points.Type: ApplicationFiled: October 28, 2004Publication date: May 11, 2006Inventors: Charles Hoke, Ken Nishimura
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Publication number: 20060077552Abstract: A wavelength selective switching device and method for selectively transmitting optical signals based on wavelength utilizes diffraction to spatially separate the optical signals of different wavelengths such that the optical signal of a selected wavelength can be selectively transmitted. The wavelength selective switching device selectively rotates the polarization components of the optical signals such that the polarization states of the polarization components are the same in both incoming and outgoing directions at the diffraction grating. Thus, a diffraction grating with a high grating line frequency (e.g. greater than 900 grating lines per mm for signals in the 1550 nm wavelength range) can be used for diffracting the polarization components of the optical signals in both the incoming and outgoing directions.Type: ApplicationFiled: October 20, 2005Publication date: April 13, 2006Inventors: Rene Helbing, Charles Hoke, Ken Nishimura
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Publication number: 20050168430Abstract: Display contrast in electro-optical display devices is improved using a drive circuit including pixel drive circuits and a common drive circuit. The pixel drive circuits are connected to pixel electrodes of the display device, and are operable to generate respective pixel drive signals that alternate between a first high voltage and a first low voltage differing in voltage by less than or equal to a process-limited maximum. The common drive circuit is connected to a common electrode of the display device, and is operable to generate a common drive signal alternating between a second high voltage and a second low voltage differing in voltage by more than the process-limited maximum. The common drive signal is asymmetrically bipolar with respect to the first low voltage of the pixel drive signal.Type: ApplicationFiled: February 4, 2004Publication date: August 4, 2005Inventors: Ken Nishimura, Charles Hoke, Thomas Knotts
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Publication number: 20050128367Abstract: Embodiments of the invention involve UV resistant liquid crystal cells. One embodiment of the invention is to increase the volume of the liquid crystal material that is stored inside the cell. For example, trenches may be used to provide reservoirs that hold the additional liquid crystal material. Another embodiment of the invention uses an inorganic alignment layer in the cell, instead of using an organic material as the alignment layer. A further embodiment of the invention uses a pump to circulate liquid crystal material through the cell. The inventive cell can be used as a SLM in photolithographic imaging systems.Type: ApplicationFiled: December 15, 2003Publication date: June 16, 2005Inventors: Charles Hoke, Peter Robrish, Rene Helbing, Ken Nishimura