Patents by Inventor Evert Pieter Houwman
Evert Pieter Houwman 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: 20210115591Abstract: A CVD single crystal diamond material suitable for use in, or as, an optical device or element. It is suitable for use in a wide range of optical applications such as, for example, optical windows, laser windows, optical reflectors, optical refractors and gratings, and etalons. The CVD diamond material is produced by a CVD method in the presence of a controlled low level of nitrogen to control the development of crystal defects and thus achieve a diamond material having key characteristics for optical applications.Type: ApplicationFiled: October 27, 2020Publication date: April 22, 2021Applicant: ELEMENT SIX TECHNOLOGIES LIMITEDInventors: HERMAN PHILIP GODFRIED, GEOFFREY ALAN SCARSBROOK, DANIEL JAMES TWITCHEN, EVERT PIETER HOUWMAN, WILHELMUS GERTRUDA MARIA NELISSEN, ANDREW JOHN WHITEHEAD, CLIVE EDWARD HALL, PHILIP MAURICE MARTINEAU
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Patent number: 10851471Abstract: A CVD single crystal diamond material suitable for use in, or as, an optical device or element. It is suitable for use in a wide range of optical applications such as, for example, optical windows, laser windows, optical reflectors, optical refractors and gratings, and etalons. The CVD diamond material is produced by a CVD method in the presence of a controlled low level of nitrogen to control the development of crystal defects and thus achieve a diamond material having key characteristics for optical applications.Type: GrantFiled: October 19, 2018Date of Patent: December 1, 2020Assignee: Element Six Technologies LimitedInventors: Herman Philip Godfried, Geoffrey Alan Scarsbrook, Daniel James Twitchen, Evert Pieter Houwman, Wilhelmus Gertruda Maria Nelissen, Andrew John Whitehead, Clive Edward Hall, Philip Maurice Martineau
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Publication number: 20190055669Abstract: A CVD single crystal diamond material suitable for use in, or as, an optical device or element. It is suitable for use in a wide range of optical applications such as, for example, optical windows, laser windows, optical reflectors, optical refractors and gratings, and etalons. The CVD diamond material is produced by a CVD method in the presence of a controlled low level of nitrogen to control the development of crystal defects and thus achieve a diamond material having key characteristics for optical applications.Type: ApplicationFiled: October 19, 2018Publication date: February 21, 2019Applicant: ELEMENT SIX TECHNOLOGIES LIMITEDInventors: HERMAN PHILIP GODFRIED, GEOFFREY ALAN SCARSBROOK, DANIEL JAMES TWITCHEN, EVERT PIETER HOUWMAN, WILHEMUS GERTRUDA MARIA NELISSEN, ANDREW JOHN WHITEHEAD, CLIVE EDWARD HALL, PHILIP MAURICE MARTINEAU
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Patent number: 10125434Abstract: A CVD single crystal diamond material suitable for use in, or as, an optical device or element. It is suitable for use in a wide range of optical applications such as, for example, optical windows, laser windows, optical reflectors, optical refractors and gratings, and etalons. The CVD diamond material is produced by a CVD method in the presence of a controlled low level of nitrogen to control the development of crystal defects and thus achieve a diamond material having key characteristics for optical applications.Type: GrantFiled: December 9, 2016Date of Patent: November 13, 2018Assignee: Element Six Technologies LimitedInventors: Herman Philip Godfried, Geoffrey Alan Scarsbrook, Daniel James Twitchen, Evert Pieter Houwman, Wilhemus Gertruda Maria Nelissen, Andrew John Whitehead, Clive Edward Hall, Philip Maurice Martineau
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Publication number: 20170183794Abstract: A CVD single crystal diamond material suitable for use in, or as, an optical device or element. It is suitable for use in a wide range of optical applications such as, for example, optical windows, laser windows, optical reflectors, optical refractors and gratings, and etalons. The CVD diamond material is produced by a CVD method in the presence of a controlled low level of nitrogen to control the development of crystal defects and thus achieve a diamond material having key characteristics for optical applications.Type: ApplicationFiled: December 9, 2016Publication date: June 29, 2017Applicant: ELEMENT SIX TECHNOLOGIES LIMITEDInventors: HERMAN PHILIP GODFRIED, GEOFFREY ALAN SCARSBROOK, DANIEL JAMES TWITCHEN, EVERT PIETER HOUWMAN, WILHEMUS GERTRUDA MARIA NELISSEN, ANDREW JOHN WHITEHEAD, CLIVE EDWARD HALL, PHILIP MAURICE MARTINEAU
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Patent number: 9551090Abstract: A CVD single crystal diamond material suitable for use in, or as, an optical device or element. It is suitable for use in a wide range of optical applications such as, for example, optical windows, laser windows, optical reflectors, optical refractors and gratings, and etalons. The CVD diamond material is produced by a CVD method in the presence of a controlled low level of nitrogen to control the development of crystal defects and thus achieve a diamond material having key characteristics for optical applications.Type: GrantFiled: August 19, 2014Date of Patent: January 24, 2017Assignee: Element Six Technologies LimitedInventors: Herman Philip Godfried, Geoffrey Alan Scarsbrook, Daniel James Twitchen, Evert Pieter Houwman, Wilhelmus Gertruda Maria Nelissen, Andrew John Whitehead, Clive Edward Hall, Philip Maurice Martineau
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Patent number: 8936774Abstract: A CVD single crystal diamond material suitable for use in, or as, an optical device or element. It is suitable for use in a wide range of optical applications such as, for example, optical windows, laser windows, optical reflectors, optical refractors and gratings, and etalons. The CVD diamond material is produced by a CVD method in the presence of a controlled low level of nitrogen to control the development of crystal defects and thus achieve a diamond material having key characteristics for optical applications.Type: GrantFiled: January 21, 2010Date of Patent: January 20, 2015Assignee: Element Six Technologies LimitedInventors: Herman Philip Godfried, Geoffrey Alan Scarsbrook, Daniel James Twitchen, Evert Pieter Houwman, Wilhelmus Gertruda Maria Nelissen, Andrew John Whitehead, Clive Edward Hall, Philip Maurice Martineau
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Publication number: 20140356276Abstract: A CVD single crystal diamond material suitable for use in, or as, an optical device or element. It is suitable for use in a wide range of optical applications such as, for example, optical windows, laser windows, optical reflectors, optical refractors and gratings, and etalons. The CVD diamond material is produced by a CVD method in the presence of a controlled low level of nitrogen to control the development of crystal defects and thus achieve a diamond material having key characteristics for optical applications.Type: ApplicationFiled: August 19, 2014Publication date: December 4, 2014Applicant: ELEMENT SIX TECHNOLOGIES LIMITEDInventors: Herman Philip GODFRIED, Geoffrey Alan SCARSBROOK, Daniel James TWITCHEN, Evert Pieter HOUWMAN, Wilhelmus Gertruda Maria NELISSEN, Andrew John WHITEHEAD, Clive Edward HALL, Philip Maurice MARTINEAU
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Patent number: 8309205Abstract: A single crystal diamond element having a convex surface is disclosed, the convex surface including a spherical segment for which the maximum peak to valley deviation from a perfect spherical surface is less than about 5 ?m. Alternatively or in addition, the RMS deviation from a perfect spherical surface may be less than about 500 nm, or the RMS roughness less than about 30 nm. A single crystal diamond element with a radius of curvature less than about 20 mm is also disclosed. In one aspect a single crystal diamond element having a conical half-angle greater than about 10° is described. The invention also provides a method for forming a rotationally symmetrical surface on a single crystal diamond element, comprising rotating the element about a first axis, applying a laser beam to the element in a direction perpendicular to the first axis, and translating the laser beam in two dimensions in a plane perpendicular to the direction of the beam.Type: GrantFiled: July 7, 2006Date of Patent: November 13, 2012Assignee: Element Six LimitedInventors: Wilhelmus Gerarda Maria Nelissen, Herman Philip Godfried, Evert Pieter Houwman, Paulus Adrianus Cornelis Kriele, Johannes Cornelis Lamers, Gerrit Jan Pels, Bartholomeus Mathias Van Oerle, Paulus Geradus Hendricus Maria Spaay, Mark Robin McClymont, Christopher John Howard Wort, Geoffrey Alan Scarsbrook
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Patent number: 7740824Abstract: A CVD single crystal diamond material suitable for use in, or as, an optical device or element. It is suitable for use in a wide range of optical applications such as, for example, optical windows, laser windows, optical reflectors, optical refractors and gratings, and etalons. The CVD diamond material is produced by a CVD method in the presence of a controlled low level of nitrogen to control the development of crystal defects and thus achieve a diamond material having key characteristics for optical applications.Type: GrantFiled: November 21, 2003Date of Patent: June 22, 2010Inventors: Herman Philip Godfried, Geoffrey Alan Scarsbrook, Daniel James Twitchen, Evert Pieter Houwman, Wilhelmus Gertruda Maria Nelissen, Andrew John Whitehead, Clive Edward Hall, Philip Maurice Martineau
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Publication number: 20100116197Abstract: A CVD single crystal diamond material suitable for use in, or as, an optical device or element. It is suitable for use in a wide range of optical applications such as, for example, optical windows, laser windows, optical reflectors, optical refractors and gratings, and etalons. The CVD diamond material is produced by a CVD method in the presence of a controlled low level of nitrogen to control the development of crystal defects and thus achieve a diamond material having key characteristics for optical applications.Type: ApplicationFiled: January 21, 2010Publication date: May 13, 2010Inventors: Herman Philip Godfried, Geoffrey Alan Scarsbrook, Daniel James Twitchen, Evert Pieter Houwman, Wilhelmus Gertruda Maria Nelissen, Andrew John Whitehead, Clive Edward Hall, Philip Maurice Martineau
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Publication number: 20090022951Abstract: A single crystal diamond element having a convex surface is disclosed, the convex surface including a spherical segment for which the maximum peak to valley deviation from a perfect spherical surface is less than about 5 ?m. Alternatively or in addition, the RMS deviation from a perfect spherical surface may be less than about 500 nm, or the RMS roughness less than about 30 nm. A single crystal diamond element with a radius of curvature less than about 20 mm is also disclosed. In one aspect a single crystal diamond element having a conical half-angle greater than about 10° is described. The invention also provides a method for forming a rotationally symmetrical surface on a single crystal diamond element, comprising rotating the element about a first axis, applying a laser beam to the element in a direction perpendicular to the first axis, and translating the laser beam in two dimensions in a plane perpendicular to the direction of the beam.Type: ApplicationFiled: July 7, 2006Publication date: January 22, 2009Inventors: Wilhelmus Gerarda Maria Nelissen, Herman Philip Godfried, Evert Pieter Houwman, Paulus Adrianus Cornelis Kriele, Johannes Cornelis Lamers, Gerrit Jan Pels, Bartholomeus Mathias Van Oerle, Paulus Gerardus Hendricus Maria Spaay, Mark Robin McClymont, Christopher John Howard Wort, Geoffrey Alan Scarsbrook
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Publication number: 20040229464Abstract: A CVD single crystal diamond material suitable for use in, or as, an optical device or element. It is suitable for use in a wide range of optical applications such as, for example, optical windows, laser windows, optical reflectors, optical refractors and gratings, and etalons. The CVD diamond material is produced by a CVD method in the presence of a controlled low level of nitrogen to control the development of crystal defects and thus achieve a diamond material having key characteristics for optical applications.Type: ApplicationFiled: November 21, 2003Publication date: November 18, 2004Inventors: Herman Philip Godfried, Geoffrey Alan Scarsbrook, Daniel James Twitchen, Evert Pieter Houwman, Wilhelmus Gertruda Maria Nelissen, Andrew John Whitehead, Clive Edward Hall, Philip Maurice Martineau