Patents by Inventor Curtis J. Harkrider
Curtis J. Harkrider 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).
-
Patent number: 10236995Abstract: A system includes a detector array having a plurality of level detectors to monitor an optical input signal. Each level detector of the detector array operates in a different operating range, and each operating range for each level detector has a different saturation level and a different cutoff level based on a power level of the optical input signal. A controller monitors the plurality of level detectors of the detector array to detect a present power level for the optical input signal by selecting the operating range that is associated with the level detector operating between its saturation level and its cutoff level.Type: GrantFiled: November 1, 2016Date of Patent: March 19, 2019Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATIONInventors: John Featherston, James M. Cicchiello, Curtis J. Harkrider, Christopher A. Archer, Frederick D. Bean
-
Publication number: 20170048003Abstract: A system includes a detector array having a plurality of level detectors to monitor an optical input signal. Each level detector of the detector array operates in a different operating range, and each operating range for each level detector has a different saturation level and a different cutoff level based on a power level of the optical input signal. A controller monitors the plurality of level detectors of the detector array to detect a present power level for the optical input signal by selecting the operating range that is associated with the level detector operating between its saturation level and its cutoff level.Type: ApplicationFiled: November 1, 2016Publication date: February 16, 2017Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATIONInventors: JOHN FEATHERSTON, JAMES M. CICCHIELLO, CURTIS J. HARKRIDER, CHRISTOPHER A. ARCHER, FREDERICK D. BEAN
-
Patent number: 9537580Abstract: A system includes a detector array having a plurality of level detectors to monitor an optical input signal. Each level detector of the detector array operates in a different operating range, and each operating range for each level detector has a different saturation level and a different cutoff level based on a power level of the optical input signal. A controller monitors the plurality of level detectors of the detector array to detect a present power level for the optical input signal by selecting the operating range that is associated with the level detector operating between its saturation level and its cutoff level.Type: GrantFiled: December 18, 2013Date of Patent: January 3, 2017Assignee: Northrop Grumman Systems CorporationInventors: John Featherston, James M. Cicchiello, Curtis J. Harkrider, Christopher A. Archer, Frederick D. Bean
-
Publication number: 20150171957Abstract: A system includes a detector array having a plurality of level detectors to monitor an optical input signal. Each level detector of the detector array operates in a different operating range, and each operating range for each level detector has a different saturation level and a different cutoff level based on a power level of the optical input signal. A controller monitors the plurality of level detectors of the detector array to detect a present power level for the optical input signal by selecting the operating range that is associated with the level detector operating between its saturation level and its cutoff level.Type: ApplicationFiled: December 18, 2013Publication date: June 18, 2015Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATIONInventors: JOHN FEATHERSTON, JAMES M. CICCHIELLO, CURTIS J. HARKRIDER, CHRISTOPHER A. ARCHER, FREDERICK D. BEAN
-
Patent number: 7557979Abstract: A beam-steering element made of a more optically-active material, potassium tantalate niobate, with an improved diffraction efficiency, having a plurality of electrode layers and one electro-optic crystal layer interposed between every two adjacent electrode layers. Each electro-optic crystal layer and the electrode layer adjacent thereto have an aspect ratio of about 1:1. The electrode layers and the electro-optic crystal layers are interposed between two substrates. Preferably, the substrates are transparent to an incoming beam to be modulated by the electro-optic crystal layer.Type: GrantFiled: August 6, 2007Date of Patent: July 7, 2009Assignee: Northrop Grumman CorporationInventors: James M. Cicchiello, Curtis J. Harkrider, Kenneth E. Kreischer, David A. Gallagher
-
Publication number: 20080259435Abstract: A beam-steering element made of a more optically-active material, potassium tantalate niobate, with an improved diffraction efficiency, having a plurality of electrode layers and one electro-optic crystal layer interposed between every two adjacent electrode layers. Each electro-optic crystal layer and the electrode layer adjacent thereto have an aspect ratio of about 1:1. The electrode layers and the electro-optic crystal layers are interposed between two substrates. Preferably, the substrates are transparent to an incoming beam to be modulated by the electro-optic crystal layer.Type: ApplicationFiled: August 6, 2007Publication date: October 23, 2008Inventors: James M. Cicchiello, Curtis J. Harkrider, Kenneth E. Kreischer, David A. Gallagher
-
Patent number: 7411724Abstract: A beam-steering element made of a more optically-active material, potassium tantalate niobate, with an improved diffraction efficiency, having a plurality of electrode layers and one electro-optic crystal layer interposed between every two adjacent electrode layers. Each electro-optic crystal layer and the electrode layer adjacent thereto have an aspect ratio of about 1:1. The electrode layers and the electro-optic crystal layers are interposed between two substrates. Preferably, the substrates are transparent to an incoming beam to be modulated by the electro-optic crystal layer.Type: GrantFiled: December 6, 2004Date of Patent: August 12, 2008Assignee: Northrop Grumman CorporationInventors: James M. Cicchiello, Curtis J. Harkrider, Kenneth E. Kreischer, David A. Gallagher
-
Patent number: 7058277Abstract: A target illuminating system is provided for steering a scan optical beam and reducing the size of an optical output aperture. The system includes an array of scan beam outlets being selectively operative to receive and project a point source of scan beam radiation along an optical path. The system also includes a collimating element being disposed along the optical path. The collimating element is operative to receive the point source of scan beam radiation and to output the collimated scan optical beam in a desired coarse direction corresponding to a selected one of the scan beam outlets. The scan optical beam defines a scan exit pupil which is substantially coincident with the optical output aperture.Type: GrantFiled: March 15, 2005Date of Patent: June 6, 2006Assignee: Northrop Grumman CorporationInventors: Curtis J. Harkrider, Ronald B. Jones
-
Patent number: 7057787Abstract: An electro-optic crystal based beam-steering device preferably based on KTN, having a first deflector and a second deflector. The first deflector has a pair of substrates each having a plurality of first electrode lines extending along a first direction and a plurality of electro-optic crystal modulators interposed between the first electrode lines. The second deflector has a pair of substrates each having a plurality of second electrode lines extending along a second direction and a plurality of electro-optic crystal modulators interposed between the second electrode lines. The first direction is orthogonal to the second direction.Type: GrantFiled: October 29, 2004Date of Patent: June 6, 2006Assignee: Northrop Grumman CorporationInventors: James M. Cicchiello, Curtis J. Harkrider