Patents by Inventor Brian Johansen
Brian Johansen 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: 20230420905Abstract: An apparatus includes an acousto-optical deflector (AOD) system operative to deflect a beam of laser energy within a two-dimensional scan field. The AOD system includes a first AOD operative to deflect the beam of laser energy along a first axis of the two-dimensional scan field; a second AOD arranged optically downstream of the first AOD, wherein the second AOD is operative to deflect the beam of laser energy along a second axis of the two-dimensional scan field; and a controller operatively coupled to the AOD system. The controller is configured to drive each of the first AOD and the second AOD to deflect the beam of laser energy within the two-dimensional scan field and is further configured to drive the first AOD and the second AOD at at least substantially the same diffraction efficiency.Type: ApplicationFiled: November 11, 2021Publication date: December 28, 2023Applicant: ELECTRO SCIENTIFIC INDUSTRIES, INC.Inventors: Brian JOHANSEN, Tyler HOWE, Mehmet ALPAY, James BROOKHYSER, Jered RICHTER
-
Publication number: 20210276125Abstract: Varied embodiments of a laser-based machine tool, and techniques for controlling the same are provided. Some embodiments relate to techniques to facilitate uniform and reproducible processing of workpieces. Other embodiments relate to a zoom lens having a quickly-variable focal length. Still other embodiments relate to various features of a laser-based multi-axis machine tool that can facilitate efficient delivery of laser energy to a scan head, that can address thermomechanical issues that may arise during workpiece processing, etc. Another embodiment relates to techniques for minimizing or preventing undesired accumulation of particulate matter on workpiece surfaces during processing. A number of other embodiments and arrangements are also detailed.Type: ApplicationFiled: April 30, 2018Publication date: September 9, 2021Inventors: Guang LU, Brian Johansen, Mark Kosmowski, Ho Wai Lo, Guangyu Li
-
Patent number: 9456266Abstract: The present invention relates to an ear simulator representing an average acoustic ear drum impedance of ears of a population of humans. Another aspect of the invention relates to an ear simulator assembly comprising an ear simulator representing average acoustic ear drum impedance and a detachable ear canal simulator to provide an ear simulator assembly representing an acoustic impedance of a human ear canal or average human canals of the population.Type: GrantFiled: April 15, 2013Date of Patent: September 27, 2016Assignee: Brül & Kjær Sound & Vibration Measurement A/SInventors: Brian Johansen, Søren Jønsson
-
Publication number: 20150124978Abstract: The present invention relates to an ear simulator representing an average acoustic ear drum impedance of ears of a population of humans. Another aspect of the invention relates to an ear simulator assembly comprising an ear simulator representing average acoustic ear drum impedance and a detachable ear canal simulator to provide an ear simulator assembly representing an acoustic impedance of a human ear canal or average human canals of the population.Type: ApplicationFiled: April 15, 2013Publication date: May 7, 2015Inventors: Brian Johansen, Søren Jønsson
-
Patent number: 8961110Abstract: A wind turbine is disclosed, the wind turbine comprising a nacelle including at least one of a debris-generating device, an inlet for air or an outlet for air. Following this invention, the wind turbine further comprises at least one electro-static filter arranged to filter at least one of the debris coming from the debris-generating device, the air coming into the nacelle through the inlet or the air coming out of the nacelle through the outlet.Type: GrantFiled: August 26, 2009Date of Patent: February 24, 2015Assignee: Vestas Wind Systems A/SInventor: Brian Johansen
-
Patent number: 8866043Abstract: An improved method and apparatus for drilling tapered holes in workpieces with laser pulses is presented which uses defocused laser pulses to machine the holes with specified taper and surface finish while maintaining specified exit diameters and improved system throughput. A system is described which can also drill holes with the desired taper and surface finish without requiring defocused laser pulses.Type: GrantFiled: July 2, 2012Date of Patent: October 21, 2014Assignee: Electro Scientific Industries, Inc.Inventors: Jeff Howerton, David Childers, Brian Johansen, Mehmet Emin Alpay
-
Patent number: 8723076Abstract: Systems and methods cut trenches of multiple widths in a material using a single pass of a laser beam. A first series of laser pulses cut a work surface of the material at a first cutting speed using a first spot size. In a transition region from a first trench width to a second trench width, a second series of laser pulses sequentially change spot sizes while gradually changing from the first cutting speed to a second cutting speed. Then, a third series of laser pulses continue to cut the work surface at the second cutting speed using a second spot size. The method provides for increased depth control in the transition region. A system uses a selectively adjustable optical component in the laser beam path to rapidly change spot size by adjusting a position of a focal plane with respect to the work surface.Type: GrantFiled: February 17, 2012Date of Patent: May 13, 2014Assignee: Electro Scientific Industries, Inc.Inventors: Mehmet E. Alpay, Brian Johansen, David Childers
-
Patent number: 8686739Abstract: Embodiments of an apparatus for measuring the leakage current of capacitive components is taught. One embodiment includes a first stage amplifier configured to receive an input from a serially-connected capacitive component at an inverting input and a feedback resistor in a feedback path of the first stage amplifier. A resistance value of the feedback resistor is programmable based on an expected value of the leakage current and a corresponding voltage output.Type: GrantFiled: November 8, 2011Date of Patent: April 1, 2014Assignee: Electro Scientific Industries, Inc.Inventors: Brian Johansen, Brandon John McCurry
-
Patent number: 8581428Abstract: The present invention concerns a wind turbine comprising a generator, a controller and a measurement equipment connected to the generator, the measurement equipment being adapted to measuring at least one quality parameter indicating the quality of generator insulation of the generator, and the measurement equipment being adapted to transmitting the at least one quality parameter to the controller, wherein the controller is adapted to evaluate the at least one quality parameter according to a quality criterion and set up an alarm signal in accordance with the evaluation. Further, the invention relates to a method for upgrading a wind turbine.Type: GrantFiled: August 25, 2009Date of Patent: November 12, 2013Assignee: Vestas Wind Systems A/SInventor: Brian Johansen
-
Publication number: 20120267350Abstract: An improved method and apparatus for drilling tapered holes in workpieces with laser pulses is presented which uses defocused laser pulses to machine the holes with specified taper and surface finish while maintaining specified exit diameters and improved system throughput. A system is described which can also drill holes with the desired taper and surface finish without requiring defocused laser pulses.Type: ApplicationFiled: July 2, 2012Publication date: October 25, 2012Applicant: ELECTRO SCIENTIFIC INDUSTRIES, INCInventors: Jeff Howerton, David Childers, Brian Johansen, Mehmet Emin Alpay
-
Patent number: 8237080Abstract: An improved method and apparatus for drilling tapered holes in workpieces with laser pulses is presented which uses defocused laser pulses to machine the holes with specified taper and surface finish while maintaining specified exit diameters and improved system throughput. A system is described which can also drill holes with the desired taper and surface finish without requiring defocused laser pulses.Type: GrantFiled: March 27, 2008Date of Patent: August 7, 2012Assignee: Electro Scientific Industries, IncInventors: Jeff Howerton, David Childers, Brian Johansen, Mehmet Emin Alpay
-
Patent number: 8217302Abstract: Systems and methods reduce or prevent back-reflections in a laser processing system. A laser processing system includes a laser source to generate an incident laser beam, a laser beam output to direct the incident laser beam toward a work surface, and a lens to receive the incident laser beam along a first axis of propagation that is substantially perpendicular to the work surface. The lens includes a primary axis that is substantially parallel to, and offset from, the first axis of propagation. The lens is configured to focus the incident laser beam onto the work surface along a second axis of propagation that forms a non-perpendicular angle with the work surface such that at least a substantial portion of a reflected laser beam from the work surface does not return to the laser beam output.Type: GrantFiled: September 12, 2008Date of Patent: July 10, 2012Assignee: Electro Scientific Industries, IncInventors: Mehmet E. Alpay, Brian Johansen
-
Publication number: 20120145686Abstract: Systems and methods cut trenches of multiple widths in a material using a single pass of a laser beam. A first series of laser pulses cut a work surface of the material at a first cutting speed using a first spot size. In a transition region from a first trench width to a second trench width, a second series of laser pulses sequentially change spot sizes while gradually changing from the first cutting speed to a second cutting speed. Then, a third series of laser pulses continue to cut the work surface at the second cutting speed using a second spot size. The method provides for increased depth control in the transition region. A system uses a selectively adjustable optical component in the laser beam path to rapidly change spot size by adjusting a position of a focal plane with respect to the work surface.Type: ApplicationFiled: February 17, 2012Publication date: June 14, 2012Applicant: Electro Scientific Industries, Inc.Inventors: Mehmet E. ALPAY, Brian JOHANSEN, David CHILDERS
-
Publication number: 20120049857Abstract: Embodiments of an apparatus for measuring the leakage current of capacitive components is taught. One embodiment includes a first stage amplifier configured to receive an input from a serially-connected capacitive component at an inverting input and a feedback resistor in a feedback path of the first stage amplifier. A resistance value of the feedback resistor is programmable based on an expected value of the leakage current and a corresponding voltage output.Type: ApplicationFiled: November 8, 2011Publication date: March 1, 2012Applicant: ELECTRO SCIENTIFIC INDUSTRIES, INC.Inventors: Brian Johansen, Brandon J. McCurry
-
Patent number: 8124911Abstract: Systems and methods cut trenches of multiple widths in a material using a single pass of a laser beam. A first series of laser pulses cut a work surface of the material at a first cutting speed using a first spot size. In a transition region from a first trench width to a second trench width, a second series of laser pulses sequentially change spot sizes while gradually changing from the first cutting speed to a second cutting speed. Then, a third series of laser pulses continue to cut the work surface at the second cutting speed using a second spot size. The method provides for increased depth control in the transition region. A system uses a selectively adjustable optical component in the laser beam path to rapidly change spot size by adjusting a position of a focal plane with respect to the work surface.Type: GrantFiled: March 31, 2008Date of Patent: February 28, 2012Assignee: Electro Scientific Industries, Inc.Inventors: Mehmet E. Alpay, Brian Johansen, David Childers
-
Patent number: 8054085Abstract: Embodiments of an apparatus for measuring the leakage current of capacitive components is taught. One embodiment includes a first stage amplifier configured to receive an input from a serially-connected capacitive component at an inverting input and a feedback resistor in a feedback path of the first stage amplifier. A resistance value of the feedback resistor is programmable based on an expected value of the leakage current and a corresponding voltage output.Type: GrantFiled: March 31, 2008Date of Patent: November 8, 2011Assignee: Electro Scientific Industries, Inc.Inventors: Brian Johansen, Brandon John McCurry
-
Publication number: 20110248499Abstract: The present invention concerns a wind turbine comprising a generator, a controller and a measurement equipment connected to the generator, the measurement equipment being adapted to measuring at least one quality parameter indicating the quality of generator insulation of the generator, and the measurement equipment being adapted to transmitting the at least one quality parameter to the controller, wherein the controller is adapted to evaluate the at least one quality parameter according to a quality criterion and set up an alarm signal in accordance with the evaluation. Further, the invention relates to a method for upgrading a wind turbine.Type: ApplicationFiled: August 25, 2009Publication date: October 13, 2011Applicant: VESTAS WIND SYSTEMS A/SInventor: Brian Johansen
-
Publication number: 20110241352Abstract: A wind turbine is disclosed, the wind turbine comprising a nacelle including at least one of a debris-generating device, an inlet for air or an outlet for air. Following this invention, the wind turbine further comprises at least one electro-static filter arranged to filter at least one of the debris coming from the debris-generating device, the air coming into the nacelle through the inlet or the air coming out of the nacelle through the outlet.Type: ApplicationFiled: August 26, 2009Publication date: October 6, 2011Applicant: VESTAS WIND SYSTEMS A/SInventor: Brian Johansen
-
Patent number: 7982161Abstract: An improved method and apparatus for drilling vias in electronic substrates with laser pulses is presented which uses one or more tailored pulses to reduce debris remaining in the via while maintaining system throughput and avoiding damage to the substrate. A tailored pulse is a laser pulse that features a power spike having a peak power 10% higher than the average power of the pulse and lasting less than 50% of the duration of the pulse. Methods and apparatuses for creating tailored pulses by slicing longer duration pulses are shown.Type: GrantFiled: March 24, 2008Date of Patent: July 19, 2011Assignee: Electro Scientific Industries, Inc.Inventors: Yunlong Sun, Weisheng Lei, Hisashi Matsumoto, Brian Johansen, Gregg Hardy, Brian Baird
-
Publication number: 20100078419Abstract: In a laser micro-machining system including a simple focusing lens located between a laser source and a beam steering mechanism along the path of a laser beam pulse. The focusing lens being a simple single-element spherical lens with an optical axis of the focusing lens located inline with a laser beam input from the laser source. The focusing lens located further away from a work piece than the beam steering mechanism. An active beam path management system moves the simple focusing lens in concert with and relative to the beam steering mechanism to maintain a focal point coincident with a surface of the work piece at all deflection angles affected by the beam steering mechanism. The focusing lens is rapidly moveable in concert with the beam steering mechanism to maintain a constant beam path length from the lens output to the work piece at all times.Type: ApplicationFiled: September 26, 2008Publication date: April 1, 2010Applicant: ELECTRO SCIENTIFIC INDUSTRIES, INCInventors: Brian JOHANSEN, Mehmet Ermin ALPAY, Jeff HOWERTON