Patents by Inventor Ernst Hegels
Ernst Hegels 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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Publication number: 20220086353Abstract: An optical zoom camera and an optical zoom system for the optical zoom camera. The optical zoom system comprises at least three spatially separated lens groups, which are arranged on an optical axis. The optical zoom system does not include any further lens groups on the optical axis. A third lens group is immovable along the optical axis, a second lens group is movable along the optical axis to set a magnification of the optical zoom system, and a first lens group is movable along the optical axis to focus the optical zoom system.Type: ApplicationFiled: November 22, 2021Publication date: March 17, 2022Inventors: Ernst Hegels, Volker Gäbler
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Patent number: 9636256Abstract: The invention relates to a method and apparatus for calculating a laser shot file for use in an excimer laser comprising the steps of providing information with respect to a desired ablation profile, calculating the shot density of the desired ablation profile, using a cost function for placing laser shots of the excimer laser on grid positions wherein a threshold value is determined based on the calculated shot density of the desired ablation profile.Type: GrantFiled: December 19, 2013Date of Patent: May 2, 2017Assignee: TECHNOLAS PERFECT VISION GMBHInventor: Ernst Hegels
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Publication number: 20160346120Abstract: The invention relates to a method and apparatus for calculating a laser shot file for use in an excimer laser comprising the steps of providing information with respect to a desired ablation profile, calculating the shot density of the desired ablation profile, using a cost function for placing laser shots of the excimer laser on grid positions wherein a threshold value is determined based on the calculated shot density of the desired ablation profile.Type: ApplicationFiled: December 19, 2013Publication date: December 1, 2016Inventor: Ernst Hegels
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Patent number: 9345620Abstract: The invention relates to an apparatus, an algorithm and a method for providing a laser shot file for use in a laser. The laser may be an excimer laser. The shot file may be applied for performing a refractive laser treatment of an eye or for producing a customized contact lens or an intraocular lens. According to the invention information with respect to a desired ablation profile is provided and a first series of laser shot positions is calculated based on the desired ablation profile. A simulated ablation profile is generated using said first series of laser shot positions and using information about pulse characteristics of a single laser shot. The simulated ablation profile is compared with the desired ablation profile and residual structures are determined.Type: GrantFiled: April 29, 2011Date of Patent: May 24, 2016Inventors: Gerhard Youssefi, Ernst Hegels
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Patent number: 9182357Abstract: A wafer inspection system comprises a camera having a field of view, an object mount configured to position at least a portion of surface 5 of an object 3 at an object plane 15 relative to the camera and within the field of view of the camera and at least one surface portion 41 carrying a multitude of retroreflectors 95 disposed at a greater ?d distance from the camera than the object plane and within the field of view of the camera.Type: GrantFiled: December 23, 2010Date of Patent: November 10, 2015Assignee: Nanda Technologies GmbHInventors: Lars Markwort, Ernst Hegels
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Publication number: 20150173946Abstract: The invention relates to a method and apparatus for calculating a laser shot file for use in an excimer laser comprising the steps of providing information with respect to a desired ablation profile, calculating the shot density of the desired ablation profile, using a cost function for placing laser shots of the excimer laser on grid positions wherein a threshold value is determined based on the calculated shot density of the desired ablation profile.Type: ApplicationFiled: December 19, 2013Publication date: June 25, 2015Inventor: Ernst Hegels
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Patent number: 8385618Abstract: The invention relates to an apparatus and a method for determining the energy of a laser. In particular, the invention relates to an initial determination of a laser energy and the monitoring of the laser energy preferably of an excimer laser for use in a refractive laser system for treatment of any eye. An apparatus for determining an energy of an excimer laser comprises a tool comprising an area being ablated with a plurality of laser pulses of said excimer laser using at least one predetermined multi spot ablation pattern, said ablation area comprising a specific ablation area being as large as the ablation area or smaller, an image capturing means for capturing at least one image comprising at least said specific ablation area of the tool; an analyzing means for analyzing said at least one image, wherein the size of the specific ablation area provides a measure of the energy of the excimer laser.Type: GrantFiled: December 12, 2008Date of Patent: February 26, 2013Assignee: Technolas Perfect Vision GmbHInventors: Gerhard Youssefi, Birgit Lutzenberger, Julia Hoff, Ernst Hegels
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Publication number: 20120268585Abstract: A wafer inspection system comprises a camera having a field of view, an object mount configured to position at least a portion of surface 5 of an object 3 at an object plane 15 relative to the camera and within the field of view of the camera and at least one surface portion 41 carrying a multitude of retroreflectors 95 disposed at a greater ?d distance from the camera than the object plane and within the field of view of the camera.Type: ApplicationFiled: December 23, 2010Publication date: October 25, 2012Inventors: Lars Markwort, Ernst Hegels
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Publication number: 20110276043Abstract: The invention relates to an apparatus, an algorithm and a method for providing a laser shot file for use in a laser. The laser may be an excimer laser. The shot file may be applied for performing a refractive laser treatment of an eye or for producing a customized contact lens or an intraocular lens. According to the invention information with respect to a desired ablation profile is provided and a first series of laser shot positions is calculated based on the desired ablation profile. A simulated ablation profile is generated using said first series of laser shot positions and using information about pulse characteristics of a single laser shot. The simulated ablation profile is compared with the desired ablation profile and residual structures are determined.Type: ApplicationFiled: April 29, 2011Publication date: November 10, 2011Inventors: Gerhard Youssefi, Ernst Hegels
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Publication number: 20110002514Abstract: The invention relates to an apparatus and a method for determining the energy of a laser. In particular, the invention relates to an initial determination of a laser energy and the monitoring of the laser energy preferably of an excimer laser for use in a refractive laser system for treatment of any eye. An apparatus for determining an energy of an excimer laser comprises a tool comprising an area being ablated with a plurality of laser pulses of said excimer laser using at least one predetermined multi spot ablation pattern, said ablation area comprising a specific ablation area being as large as the ablation area or smaller, an image capturing means for capturing at least one image comprising at least said specific ablation area of the tool; an analyzing means for analyzing said at least one image, wherein the size of the specific ablation area provides a measure of the energy of the excimer laser.Type: ApplicationFiled: December 12, 2008Publication date: January 6, 2011Applicant: TECHNOLAS PERFECT VISION GMBHInventors: Gerhard Youssefi, Birgit Lutzenberger, Julia Hoff, Ernst Hegels
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Patent number: 7771053Abstract: A selectively marked contact lens having, in one aspect, marks in an optical zone region on a surface thereof and, in another aspect, different marks outside an optical zone region of the lens, for an in-vivo lens. With the lens in-vivo, the subject's eye is illuminated and the lens is imaged. A fast algorithm is used to determine the mark coordinates in relation to a measured pupil coordinate to determine position and/or orientation of the contact lens. A wavefront aberration measurement can also be obtained simultaneously with the contact lens position measurement, as well as pupil size. A fast algorithm provides for online measurements; i.e., at a repetition rate of 10 Hz or greater, over a selected time interval. Blinking periods are determined and anomalous lens position and/or wavefront information is discarded. A most frequently occurring wavefront and/or contact lens position/orientation is determined over the selected time interval.Type: GrantFiled: July 22, 2004Date of Patent: August 10, 2010Assignee: Bausch & Lomb IncorporatedInventors: Hans-Joachim Polland, Stefan Seitz, Kristian Hohla, Gerhard Youssefi, Ernst Hegels, Birte Jansen, Christoph Sappel
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Publication number: 20100151957Abstract: An imaging apparatus comprising an illumination device adapted for illuminating a movable object during at least two timely spaced time intervals, an image sensor device adapted to capture an image of the movable object, and a control unit adapted for coordinating the illumination device and the image sensor device in a manner that the image sensor device captures the image of the illuminated movable object during the at least two timely spaced time intervals and that the image sensor device is deactivated during at least a portion of the time distance between the at least two timely spaced time intervals.Type: ApplicationFiled: January 19, 2007Publication date: June 17, 2010Applicant: Friend for Golfers GMBHInventors: Kristian Hohla, Ernst Hegels, Georg Korn, Peter Khrustalev, Ronald Toennies, Stefan Maier
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Patent number: 7654674Abstract: The invention relates to a method for determining the visual acuity of an eye and a respective apparatus. The method comprises the steps of: providing the wavefront information of the eye, generating a point spread function based on the wavefront information of the eye, said point spread function representing a specific intensity distribution for a corresponding pupil size. After comparing the intensities of the point spread function with a selectable intensity level of intensity, those parts of the point spread function having an intensity being larger than the selectable intensity level are determined as a relevant part of the point spread function.Type: GrantFiled: November 8, 2006Date of Patent: February 2, 2010Assignee: Bausch & Lomb IncorporatedInventors: Ernst Hegels, Gerhard Youssefi
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Publication number: 20090306635Abstract: The invention relates to a method and apparatus for calculating a laser shot file for use in an excimer laser comprising the steps of providing information with respect to a desired ablation profile, calculating the shot density of the desired ablation profile, using a cost function for placing laser shots of the excimer laser on grid positions wherein a threshold value is determined based on the calculated shot density of the desired ablation profile.Type: ApplicationFiled: February 7, 2008Publication date: December 10, 2009Inventor: Ernst Hegels
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Publication number: 20090264874Abstract: The invention relates to a method and apparatus for calculating a laser shot file for use in a refractive excimer laser comprising the steps of providing information with respect to a desired ablation profile, calculating the shot density of the desired ablation profile, determining a grid width of a grid being used for placing laser shots of the excimer laser on grid positions wherein the grid width is determined based on the calculated shot density of the desired ablation profile.Type: ApplicationFiled: July 27, 2007Publication date: October 22, 2009Inventor: Ernst Hegels
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Publication number: 20080246916Abstract: The invention relates to a method for determining the visual acuity of an eye and a respective apparatus. The method comprises the steps of: providing the wavefront information of the eye, generating a point spread function based on the wavefront information of the eye, said point spread function representing a specific intensity distribution for a corresponding pupil size. After comparing the intensities of the point spread function with a selectable intensity level of intensity, those parts of the point spread function having an intensity being larger than the selectable intensity level are determined as a relevant part of the point spread function.Type: ApplicationFiled: November 8, 2006Publication date: October 9, 2008Inventors: Ernst Hegels, Gerhard Youssefi
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Publication number: 20070273828Abstract: A selectively marked contact lens having, in one aspect, marks in an optical zone region on a surface thereof and, in another aspect, different marks outside an optical zone region of the lens, for an in-vivo lens. With the lens in-vivo, the subject's eye is illuminated and the lens is imaged. A fast algorithm is used to determine the mark coordinates in relation to a measured pupil coordinate to determine position and/or orientation of the contact lens. A wavefront aberration measurement can also be obtained simultaneously with the contact lens position measurement, as well as pupil size. A fast algorithm provides for online measurements; i.e., at a repetition rate of 10 Hz or greater, over a selected time interval. Blinking periods are determined and anomalous lens position and/or wavefront information is discarded. A most frequently occurring wavefront and/or contact lens position/orientation is determined over the selected time interval.Type: ApplicationFiled: July 22, 2004Publication date: November 29, 2007Inventors: Hans-Joachim Polland, Stefan Seitz, Kristian Hohla, Gerhard Youssefi, Ernst Hegels, Birte Jansen, Christoph Sappel