Patents by Inventor Mark E. Durham
Mark E. Durham 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: 20180039041Abstract: A method of fabricating an optical housing includes forming a pattern comprising a predetermined surface feature on an interior surface of the optical housing. The predetermined surface feature is configured to control reflections of stray light along an optical path between an aperture at a proximal end of the optical housing and a detector at a distal end of the optical housing.Type: ApplicationFiled: October 11, 2017Publication date: February 8, 2018Applicant: DRS Network & Imaging Systems, LLCInventors: Kevin J. McIntyre, Brian Pekarek, Mark E. Durham, Ken Pietrasik
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Patent number: 9869848Abstract: The disclosure describes systems and apparatuses that include a focusable lens, as well as methods for focusing the optical lens. The focusable lens system includes a single element lens having a concave refractive surface characterized by a first radius of curvature and a convex refractive surface characterized by a second radius of curvature larger than the first radius of curvature. A detector element generates electrical signals representative of infrared rays refracted by the single element lens and incident on the detector element, and an aperture stop is disposed around an optical axis of the optical system and secured in a constant position relative to the detector element, the aperture stop configured to limit a cone angle of rays refracted by the single element lens. They system also includes image processing circuitry configured to generate digital pixilation data based on electrical signals generated by the detector element.Type: GrantFiled: February 21, 2017Date of Patent: January 16, 2018Assignee: DRS Network & Imaging Systems, LLCInventors: Richard L. Southerland, Mark E. Durham, Patrick J. Cronkite
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Patent number: 9823544Abstract: Systems and methods for controlling stray light reflections are provided. An optical system includes an aperture having an optical axis passing therethrough, one or more optical elements disposed along an optical path, and a detector disposed along the optical path. The system further includes an optical housing disposed between the aperture and the detector. The interior surface of the optical housing includes a predetermined surface feature adapted to control reflections of stray light along the optical path between the aperture and the detector. A method of fabricating an optical housing includes forming a pattern comprising a predetermined surface feature on an interior surface of the optical housing. The predetermined surface feature is configured to control reflections of stray light along an optical path between an aperture at a proximal end of the optical housing and a detector at a distal end of the optical housing.Type: GrantFiled: March 12, 2014Date of Patent: November 21, 2017Assignee: DRS Network & Imaging Systems, LLCInventors: Kevin J. McIntyre, Brian R. Pekarek, Mark E. Durham, Ken Pietrasik
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Publication number: 20170160524Abstract: The disclosure describes systems and apparatuses that include a focusable lens, as well as methods for focusing the optical lens. The focusable lens system includes a single element lens having a concave refractive surface characterized by a first radius of curvature and a convex refractive surface characterized by a second radius of curvature larger than the first radius of curvature. A detector element generates electrical signals representative of infrared rays refracted by the single element lens and incident on the detector element, and an aperture stop is disposed around an optical axis of the optical system and secured in a constant position relative to the detector element, the aperture stop configured to limit a cone angle of rays refracted by the single element lens. They system also includes image processing circuitry configured to generate digital pixilation data based on electrical signals generated by the detector element.Type: ApplicationFiled: February 21, 2017Publication date: June 8, 2017Applicant: DRS Network & Imaging Systems, LLCInventors: Richard L. Southerland, Mark E. Durham, Patrick J. Cronkite
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Patent number: 9658423Abstract: Embodiments of the invention are directed to a springless athermal lens assembly. In one embodiment, a spacer of a springless athermal lens assembly may compensate for defocus of the camera system due to thermal expansion of the lens assembly through the coupling of a spacer to an inner barrel and an outer barrel. The inner barrel comprises a lens cell assembly and a body. The outer barrel comprises a body. The spacer comprises a body having an inner surface and an outer surface. The outer surface of the spacer body is configured to be physically coupled to outer barrel body and the inner surface of the spacer body is configured to be physically coupled to the inner barrel body. A retainer ring is configured to engage with the outer surface of the spacer body and provide a radial force against the outer surface of the spacer body to securably engage the inner surface of the spacer body with the inner barrel body.Type: GrantFiled: September 29, 2015Date of Patent: May 23, 2017Assignee: DRS Network & Imaging Systems, LLCInventors: Eric J. Gustafson, Jeff R. Emmett, Rachel L. Cooper, Samuel E. Ivey, Rohan G. Rodney, Brian R. Pekarek, Patrick J. Cronkite, Mark E. Durham
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Patent number: 9615036Abstract: The disclosure describes systems and apparatuses that include a focusable lens, as well as methods for focusing the optical lens. The focusable lens system includes a single element lens having a concave refractive surface characterized by a first radius of curvature and a convex refractive surface characterized by a second radius of curvature larger than the first radius of curvature. A detector element generates electrical signals representative of infrared rays refracted by the single element lens and incident on the detector element, and an aperture stop is disposed around an optical axis of the optical system and secured in a constant position relative to the detector element, the aperture stop configured to limit a cone angle of rays refracted by the single element lens. They system also includes image processing circuitry configured to generate digital pixilation data based on electrical signals generated by the detector element.Type: GrantFiled: March 13, 2014Date of Patent: April 4, 2017Assignee: DRS Network & Imaging Systems, LLCInventors: Richard L. Southerland, Mark E. Durham, Patrick J. Cronkite
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Publication number: 20160018619Abstract: Embodiments of the invention are directed to a springless athermal lens assembly. In one embodiment, a spacer of a springless athermal lens assembly may compensate for defocus of the camera system due to thermal expansion of the lens assembly through the coupling of a spacer to an inner barrel and an outer barrel. The inner barrel comprises a lens cell assembly and a body. The outer barrel comprises a body. The spacer comprises a body having an inner surface and an outer surface. The outer surface of the spacer body is configured to be physically coupled to outer barrel body and the inner surface of the spacer body is configured to be physically coupled to the inner barrel body. A retainer ring is configured to engage with the outer surface of the spacer body and provide a radial force against the outer surface of the spacer body to securably engage the inner surface of the spacer body with the inner barrel body.Type: ApplicationFiled: September 29, 2015Publication date: January 21, 2016Inventors: Eric J. Gustafson, Jeff R. Emmett, Rachel L. Cooper, Samuel E. Ivey, Rohan G. Rodney, Brian R. Pekarek, Patrick J. Cronkite, Mark E. Durham
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Patent number: 9176298Abstract: Embodiments of the invention are directed to a springless athermal lens assembly. In one embodiment, a spacer of a springless athermal lens assembly may compensate for defocus of the camera system due to thermal expansion of the lens assembly through micro wedge mechanisms coupling the spacer to an inner and outer barrel. The inner barrel comprises a lens cell assembly and a body having a micro wedge slot. The outer barrel comprises a body having a micro wedge slot. The spacer comprises an inner barrel micro wedge and an outer barrel micro wedge. The spacer is configured to be physically coupled to the inner barrel through engagement of the inner barrel micro wedge and the inner barrel micro wedge slot. Further, the spacer is configured to be physically coupled to the outer barrel through the engagement of the outer barrel micro wedge and the outer barrel micro wedge slot.Type: GrantFiled: October 9, 2013Date of Patent: November 3, 2015Assignee: DRS Network & Imaging Systems, LLCInventors: Eric J. Gustafson, Jeff R. Emmett, Rachel L. Cooper, Samuel E. Ivey, Rohan G. Rodney, Brian R. Pekarek, Patrick J. Cronkite, Mark E. Durham
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Publication number: 20150277077Abstract: Systems and methods for controlling stray light reflections are provided. An optical system includes an aperture having an optical axis passing therethrough, one or more optical elements disposed along an optical path, and a detector disposed along the optical path. The system further includes an optical housing disposed between the aperture and the detector. The interior surface of the optical housing includes a predetermined surface feature adapted to control reflections of stray light along the optical path between the aperture and the detector. A method of fabricating an optical housing includes forming a pattern comprising a predetermined surface feature on an interior surface of the optical housing. The predetermined surface feature is configured to control reflections of stray light along an optical path between an aperture at a proximal end of the optical housing and a detector at a distal end of the optical housing.Type: ApplicationFiled: March 12, 2014Publication date: October 1, 2015Applicant: DRS RSTA, INC.Inventors: Kevin J. McIntyre, Brian R. Pekarek, Mark E. Durham, Ken Pietrasik
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Publication number: 20140267764Abstract: The disclosure describes systems and apparatuses that include a focusable lens, as well as methods for focusing the optical lens. The focusable lens system includes a single element lens having a concave refractive surface characterized by a first radius of curvature and a convex refractive surface characterized by a second radius of curvature larger than the first radius of curvature. A detector element generates electrical signals representative of infrared rays refracted by the single element lens and incident on the detector element, and an aperture stop is disposed around an optical axis of the optical system and secured in a constant position relative to the detector element, the aperture stop configured to limit a cone angle of rays refracted by the single element lens. They system also includes image processing circuitry configured to generate digital pixilation data based on electrical signals generated by the detector element.Type: ApplicationFiled: March 13, 2014Publication date: September 18, 2014Applicant: DRS RSTA, INC.Inventors: Richard L. Southerland, Mark E. Durham, Patrick J. Cronkite