Patents by Inventor Dirk Muehlhoff
Dirk Muehlhoff 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: 9254222Abstract: The aim of the invention is to machine a material by application of non-linear radiation. The aim is achieved by modifying the laser radiation emitted by a laser beam source with the aid of a polarization modulator in such a way that laser radiation focused into the material is polarized in a linear fashion, the direction of polarization varying across the cross section of the beam.Type: GrantFiled: March 22, 2005Date of Patent: February 9, 2016Assignee: Carl Zeiss Meditec AGInventors: Mark Bischoff, Dirk Muehlhoff, Gregor Stobrawa
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Patent number: 9237965Abstract: A planning device generating control data for a treatment apparatus for refraction-correcting ophthalmic surgery is provided, said apparatus using a laser device to separate a corneal volume, which is to be removed for correction, from the surrounding cornea by at least one cut surface in the cornea of an eye, said planning device comprising an interface for receiving corneal data including information on pre-operative cuts which were generated in a previous ophthalmic operation, and computing means for defining a corneal cut surface which confines the corneal volume to be removed, said computing means defining the corneal cut surface on the basis of the corneal data and generating a control dataset for the corneal cut surface for control of the laser device.Type: GrantFiled: December 20, 2013Date of Patent: January 19, 2016Assignee: Carl Zeiss Meditec AGInventors: Mark Bischoff, Dirk Muehlhoff, Gregor Stobrawa
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Patent number: 8944601Abstract: The invention relates to a contact glass for ophthalmic surgery. Said glass comprises a lens body that is held in a frame and a front lens surface that is designed to be placed against the eye. According to the invention, the front lens surface is concave and follows a surface curvature (K) and an annular gap is formed at the edge of the front lens surface between the lens body and the frame, said gap being used to apply a negative pressure in order to fix the contact glass to the eye. The frame is designed to follow the contour of an imaginary continuation of the surface curvature (K), or at least does not project beyond the latter.Type: GrantFiled: August 25, 2006Date of Patent: February 3, 2015Assignee: Carl Zeiss Meditec AGInventors: Dirk Muehlhoff, Elke Ebert, Karsten Festag, Uwe Wolf, Dirk Preuss, Mark Bischoff, Gregor Stobrawa, Dietmar Steinmetz, Steffen Dubnack
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Publication number: 20140336627Abstract: The invention relates to a device for measuring an optical penetration that is triggered in a tissue underneath the tissue surface by means of therapeutic laser radiation which a laser-surgical device concentrates in a treatment focus located in said tissue. The inventive device is provided with a detection beam path comprising a lens system which couples radiation emanating from the tissue underneath the tissue surface into the detection beam path. A detector device generating a detection signal which indicates the spatial dimension and/or position of the optical penetration in the tissue is arranged downstream of the detection beam path.Type: ApplicationFiled: July 22, 2014Publication date: November 13, 2014Inventors: Michael KEMPE, Markus STREHLE, Dirk MUEHLHOFF, Mario GERLACH, Markus STICKER, Mark BISCHOFF, Manfred DICK, Michael BERGT
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Publication number: 20140247472Abstract: The invention concerns a scanning device for focusing a beam of rays in defined regions of a defined volume, comprising an input optics wherein the beam of rays penetrates first, having at least one first optical element; a focusing optics for focusing the beam of rays exiting from the input optics; and a deflecting device arranged between the first optical element and the focusing optics, for deflecting the beam of rays after it has passed through the first optical element, based on a position of the focus to be adjusted in lateral direction. In order to adjust the position of the focus of the beam of rays in the direction of the beam of rays, and optical element of the input optics can be displaced relative to the deflecting device.Type: ApplicationFiled: March 13, 2014Publication date: September 4, 2014Inventors: Marco Hanft, Dirk Muehlhoff, Mark Bischoff, Mario Gerlach
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Patent number: 8808279Abstract: The invention relates to a device for measuring an optical penetration that is triggered in a tissue underneath the tissue surface by means of therapeutic laser radiation which a laser-surgical device concentrates in a treatment focus located in said tissue. The inventive device is provided with a detection beam path comprising a lens system which couples radiation emanating from the tissue underneath the tissue surface into the detection beam path. A detector device generating a detection signal which indicates the spatial dimension and/or position of the optical penetration in the issue is arranged downstream of the detection beam path.Type: GrantFiled: August 22, 2003Date of Patent: August 19, 2014Assignee: Carl Zeiss Meditec AGInventors: Dirk Mühlhoff, Michael Kempe, Markus Strehle, Mario Gerlach, Markus Sticker, Mark Bischoff, Dick Manfred, Michael Bergt
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Patent number: 8702770Abstract: The invention concerns a scanning device for focusing a beam of rays in defined regions of a defined volume, comprising an input optics wherein the beam of rays penetrates first, having at least one first optical element; a focusing optics for focusing the beam of rays exiting from the input optics; and a deflecting device arranged between the first optical element and the focusing optics, for deflecting the beam of rays after it has passed through the first optical element, based on a position of the focus to be adjusted in lateral direction. In order to adjust the position of the focus of the beam of rays in the direction of the beam of rays, and optical element of the input optics can be displaced relative to the deflecting device.Type: GrantFiled: March 9, 2006Date of Patent: April 22, 2014Assignee: Carl Zeiss Meditec AGInventors: Marco Hanft, Dirk Muehlhoff, Mark Bischoff, Mario Gerlach
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Publication number: 20140107633Abstract: A planning device generating control data for a treatment apparatus for refraction-correcting ophthalmic surgery is provided, said apparatus using a laser device to separate a corneal volume, which is to be removed for correction, from the surrounding cornea by at least one cut surface in the cornea of an eye, said planning device comprising an interface for receiving corneal data including information on pre-operative cuts which were generated in a previous ophthalmic operation, and computing means for defining a corneal cut surface which confines the corneal volume to be removed, said computing means defining the corneal cut surface on the basis of the corneal data and generating a control dataset for the corneal cut surface for control of the laser device.Type: ApplicationFiled: December 20, 2013Publication date: April 17, 2014Inventors: Mark BISCHOFF, Dirk MUEHLHOFF, Gregor STOBRAWA
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Patent number: 8652122Abstract: Disclosed is a laser device for machining material, comprising a laser beam source which supplies pulsed laser radiation, and a variable deflection unit that introduces said laser radiation into the material at different, selectable points so as to create optical breakthroughs. The inventive laser device further comprises a pulse-selecting apparatus which modifies selected laser pulses of the pulsed laser radiation regarding at least one optical parameter in such a way that no more optical breakthroughs can be created using the modified laser pulses.Type: GrantFiled: September 23, 2011Date of Patent: February 18, 2014Assignee: Carl Zeiss Meditec AGInventors: Mark Bischoff, Dirk Mühlhoff, Mario Gerlach
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Patent number: 8623038Abstract: A planning device generating control data for a treatment apparatus for refraction-correcting ophthalmic surgery is provided, said apparatus using a laser device to separate a corneal volume, which is to be removed for correction, from the surrounding cornea by at least one cut surface in the cornea of an eye, said planning device comprising an interface for receiving corneal data including information on pre-operative cuts which were generated in a previous ophthalmic operation, and computing means for defining a corneal cut surface which confines the corneal volume to be removed, said computing means defining the corneal cut surface on the basis of the corneal data and generating a control dataset for the corneal cut surface for control of the laser device.Type: GrantFiled: April 25, 2008Date of Patent: January 7, 2014Assignee: Carl Zeiss Meditec AGInventors: Mark Bischoff, Dirk Muehlhoff, Gregor Stobrawa
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Patent number: 8597281Abstract: The invention relates to a method for producing cuts in a transparent material, in particular in the cornea, by creating optical openings in said material by means of laser radiation that is focused in said material, whereby the focal point is displaced in order to produce the cut from a surface grid-type array of optical openings arranged in sequence. The focal point is displaced along a trajectory and optical openings along said trajectory that are adjacent are not produced immediately after one another. In addition, the surface grid-type array of optical openings is constructed from at least two sub-grids, the optical openings of which are processed sequentially grid by grid.Type: GrantFiled: June 29, 2004Date of Patent: December 3, 2013Assignee: Carl Zeiss Meditec AGInventors: Mark Bischoff, Dirk Mühlhoff, Mario Gerlach, Carsten Lang, Markus Sticker, Michael Bergt
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Patent number: 8553735Abstract: In a device for material processing by means of laser radiation, said device comprising a source of laser radiation emitting pulsed laser radiation for interaction with the material; optics focusing the pulsed processing laser radiation to a center of interaction in the material; a scanning unit shifting the positions of the center of interaction within the material, wherein each processing laser pulse interacts with the material in a zone surrounding the center of interaction assigned to said laser pulse so that material is separated in the zones of interaction; and a control unit which controls the scanning unit and the source of laser radiation such that a cut surface is produced in the material by sequential arrangement of zones of interaction, it is envisaged that the control unit controls the source of laser radiation and the scanning unit such that adjacent centers of interaction are located at a spatial distance a ?10 ?m from each other.Type: GrantFiled: April 11, 2007Date of Patent: October 8, 2013Assignee: Carl Zeiss Meditec AGInventors: Mark Bischoff, Dirk Muehlhoff, Gregor Stobrawa
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Patent number: 8425494Abstract: An adapter for mechanically coupling a laser processing device to an object. The adapter has a central region which can be moved into the beam path of the laser processing device and a peripheral region located outside the central region. The beam path extends up to the object along an optical axis. The adapter is fixable to the laser processing device on the one hand and provided so as to contact the object with its central region on the other hand. A fixture is provided at the peripheral region that allows the adapter to be releasably fixed to a receiving part of the laser processing device such that, upon application of a determined pulling force along the optical axis, the The fixture is removable from the receiving part.Type: GrantFiled: November 16, 2004Date of Patent: April 23, 2013Assignee: Carl Zeiss Meditec AGInventors: Dirk Mühlhoff, Elke Ebert, Karsten Festag, Uwe Wolf
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Publication number: 20130072917Abstract: Improvements in respect of performing cataract surgery, and the result thereof, by application of a laser system. A device for cataract surgery, includes a surgical microscope or stereo microscope and a laser source. A module, consisting of a laser-coupling/deflecting unit, a laser-scan unit, and a focusing unit, can be attached to the surgical microscope or stereo microscope, in which at least one of these units can selectively be introduced between the surgical microscope and eye, and in which the focusing unit can scan a depth-of-focus range of greater than 1 mm.Type: ApplicationFiled: May 26, 2011Publication date: March 21, 2013Applicant: CARL ZEISS MEDITEC AGInventors: Michael Kaschke, Ludwin Monz, Tobias Damm, Dirk Mühlhoff, Karlheinz Rein, Gregor Stobrawa, Manfred Dick, Martin Kühner, Artur Högele, Matthias Reich, Dieter Grebner
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Publication number: 20120215208Abstract: A method for precise working of material, particularly organic tissue, comprises the step of providing laser pulses with a pulse length between 50 fs and 1 ps and with a pulse frequency from 50 kHz to 1 MHz and with a wavelength between 600 and 2000 nm for acting on the material to be worked. Apparatus, in accordance with the invention, for precise working of material, particularly organic tissue comprising a pulsed laser, wherein the laser has a pulse length between 50 fs and 1 ps and with a pulse frequency of from 50 kHz to 1 MHz is also described.Type: ApplicationFiled: April 26, 2012Publication date: August 23, 2012Inventors: Mark BENDETT, Mark BISCHOFF, Mario GERLACH, Dirk MUEHLHOFF
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Publication number: 20120136342Abstract: Disclosed is a laser device for machining material, comprising a laser beam source which supplies pulsed laser radiation, and a variable deflection unit that introduces said laser radiation into the material at different, selectable points so as to create optical breakthroughs. The inventive laser device further comprises a pulse-selecting apparatus which modifies selected laser pulses of the pulsed laser radiation regarding at least one optical parameter in such a way that no more optical breakthroughs can be created using the modified laser pulses.Type: ApplicationFiled: September 23, 2011Publication date: May 31, 2012Applicant: CARL ZEISS MEDITEC AGInventors: Mark BISCHOFF, Dirk MÜHLHOFF, Mario GERLACH
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Patent number: 8171937Abstract: A method for precise working of material, particularly organic tissue, comprises the step of providing laser pulses with a pulse length between 50 fs and 1 ps and with a pulse frequency from 50 kHz to 1 MHz and with a wavelength between 600 and 2000 nm for acting on the material to be worked. Apparatus, in accordance with the invention, for precise working of material, particularly organic tissue comprising a pulsed laser, wherein the laser has a pulse length between 50 fs and 1 ps and with a pulse frequency of from 50 kHz to 1 MHz is also described.Type: GrantFiled: February 1, 2008Date of Patent: May 8, 2012Assignee: Carl Zeiss Meditec AGInventors: Mark Bendett, Mark Bischoff, Mario Gerlach, Dirk Muehlhoff
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Patent number: 8092446Abstract: In a device for material processing by laser radiation, including a source of laser radiation emitting pulsed laser radiation for interaction with the material; optics focusing the pulsed processing laser radiation to a center of interaction in the material and a scanning unit shifting the positions of the center of interaction within the material. Each processing laser pulse interacts with the material in a zone surrounding the center of interaction assigned to the laser pulse so that material is separated in the zones of interaction. A control unit controls the scanning unit and the source of laser radiation such that a cut surface is produced in the material by sequential arrangement of zones of interaction. The control unit controls the source of laser radiation and the scanning unit such that adjacent centers of interaction are located at a spatial distance a?10 ?m from each other.Type: GrantFiled: October 13, 2006Date of Patent: January 10, 2012Assignee: Carl Zeiss Meditec AGInventors: Mark Bischoff, Dirk Müehlhoff, Gregor Stobrawa
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Patent number: 8025659Abstract: Disclosed is a laser device for machining material, comprising a laser beam source which supplies pulsed laser radiation, and a variable deflection unit that introduces said laser radiation into the material at different, selectable points so as to create optical breakthroughs. The inventive laser device further comprises a pulse-selecting apparatus which modifies selected laser pulses of the pulsed laser radiation regarding at least one optical parameter in such a way that no more optical breakthroughs can be created using the modified laser pulses.Type: GrantFiled: December 15, 2004Date of Patent: September 27, 2011Assignee: Carl Zeiss Meditec AGInventors: Mark Bischoff, Dirk Mühlhoff, Mario Gerlach
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Patent number: 7921852Abstract: The invention relates to a method for forming curved sections in a transparent material, especially in a cornea, by producing optical breaks at various points in the material by means of pulsed laser beams focused into the material. The laser beam is deviated in a two-dimensional manner from a deviation point in order to form the section by arranging the optical breaks in a sequence. The two-dimensional deviation occurs such that the areas of the optical opening along a curve, whereon the optical openings are arranged in a sequence, are arranged at a distance in relation to the deviation point according to an angle function which is not linear and which is adapted to the curvature of the section. The areas along the curve adjacent to optical openings inside a specific tolerance range are arranged at an even distance.Type: GrantFiled: July 13, 2004Date of Patent: April 12, 2011Assignee: Carl Zeiss Meditec AGInventors: Mario Gerlach, Carsten Lang, Dirk Mühlhoff, Markus Sticker, Mark Bischoff, Michael Bergt