JONATHAN WESLEY CAMPBELL
Pilots at Cheekwood Dr, Madison, AL
License number
Alabama A0279992
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
101 Cheekwood Dr, Madison, AL 35758
Professional information
Laser Fresnel Distance Measuring System And Method
US Patent:
7446860, Nov 4, 2008
Filed:
Sep 18, 2006
Appl. No.:
11/527648
Inventors:
Jonathan W. Campbell - Madison AL, US
David L. Lehner - Huntsville AL, US
Larry L. Smalley - Huntsville AL, US
Alvin J. Sanders - Knoxville TN, US
Dennis Duncan Earl - Knoxville TN, US
Stephen W. Allison - Knoxville TN, US
David L. Lehner - Huntsville AL, US
Larry L. Smalley - Huntsville AL, US
Alvin J. Sanders - Knoxville TN, US
Dennis Duncan Earl - Knoxville TN, US
Stephen W. Allison - Knoxville TN, US
Assignee:
The United States of America as represented by the Administrator of the National Aeronautics and Space Administration - Washington DC
International Classification:
G01C 3/08
US Classification:
356 403
Abstract:
A method and system for determining range to a target are provided. A beam of electromagnetic energy is transmitted through an aperture in an opaque screen such that a portion of the beam passes through the aperture to generate a region of diffraction that varies as a function of distance from the aperture. An imaging system is focused on a target plane in the region of diffraction with the generated image being compared to known diffraction patterns. Each known diffraction pattern has a unique value associated therewith that is indicative of a distance from the aperture. A match between the generated image and at least one of the known diffraction patterns is indicative of a distance between the aperture and target plane.