Stephen C Jensen

US Patent:

6355922, Mar 12, 2002

Filed:

Jun 14, 1999

Appl. No.:

09/332822

Inventors:

Thomas K. Lo - Tucson AZ
Stephen M. Jensen - Tucson AZ

Assignee:

Raytheon Company - Lexington MA

International Classification:

H01L 2700

US Classification:

2502081, 250214 R

Abstract:

A system and method of finding a detection threshold that separates real scene objects seen through an optical system from sensor fixed artifacts. The inventive system continuously scans the sensor so that objects in the scene move in an inverse sense relative to the scanning motion while fixed frame artifacts remain fixed in focal plane coordinate system. The difference in temporal behavior is used to discriminate against fixed frame artifacts. The inventive system finds a detection threshold that maximizes the portion of a target that may be segmented while avoiding setting the threshold so low that it merges spatially adjacent artifacts in with the target.

US Patent:

58673075, Feb 2, 1999

Filed:

Nov 13, 1996

Appl. No.:

8/748586

Inventors:

James R. Myers - Tucson AZ
David R. Smith - Tucson AZ
Daniel W. Brunton - Tucson AZ
Stephen M. Jensen - Tucson AZ
Nicholas B. Saccketti - Tucson AZ
Scott W. Sparrold - Tucson AZ
Lawrence A. Westhoven - Tucson AZ

Assignee:

Raytheon Company - El Segundo CA

International Classification:

G02B 100

US Classification:

359350

Abstract:

A blur film is made of a polymeric film material transmissive to infrared energy of a selected waveband, which is affixed to a surface of a substrate transmissive to energy of the same selected infrared waveband. The blur film has a texture or a plurality of lenslets thereon, where the surface of each lenslet is a surface of revolution. In a spatial-filter wheel application, the blur film and substrate are affixed to a support, which in turn is rotatably mounted on a drive. The support is structured such that a portion of its circumference is covered by the blur film and a portion of its circumference is not covered by the blur film. The spatial-filter wheel is rotated in front of a detector to produce alternating blurred and direct images on the detector.

US Patent:

62706977, Aug 7, 2001

Filed:

Dec 21, 1998

Appl. No.:

9/217680

Inventors:

James R. Myers - Tuscon AZ
David R. Smith - Tuscon AZ
Daniel W. Brunton - Tuscon AZ
Stephen M. Jensen - Tuscon AZ
Nicholas B. Saccketti - Tuscon AZ
Scott W. Sparrold - Tuscon AZ
Lawrence A. Westhoven - Tuscon AZ

Assignee:

Raytheon Company - Lexington MA

International Classification:

B29D 1100

US Classification:

264 134

Abstract:

A blur film is made of a polymeric film material transmissive to infrared energy of a selected waveband, which is affixed to a surface of a substrate transmissive to energy of the same selected infrared waveband. The blur film has a texture or a plurality of lenslets thereon, where the surface of each lenslet is a surface of revolution. In a spatial-filter wheel application, the blur film and substrate are affixed to a support, which in turn is rotatably mounted on a drive. The support is structured such that a portion of its circumference is covered by the blur film and a portion of its circumference is not covered by the blur film. The spatial-filter wheel is rotated in front of a detector to produce alternating blurred and direct images on the detector.