ROBERT JOSEPH VANDERBEI
Pilots at Montfort Dr, Montgomery, NJ
License number
New Jersey A1958055
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
82 Montfort Dr, Montgomery, NJ 08502
Professional information
Apparatus And Method For Tomography Of Microscopic Samples
US Patent:
5659175, Aug 19, 1997
Filed:
Dec 21, 1995
Appl. No.:
8/576607
Inventors:
Lawrence Allan Shepp - Piscataway NJ
Peter C. Fishburn - Madison NJ
Peter Schwander - Zurich, CH
Robert Joseph Vanderbei - Belle Mead NJ
Peter C. Fishburn - Madison NJ
Peter Schwander - Zurich, CH
Robert Joseph Vanderbei - Belle Mead NJ
Assignee:
Lucent Technologies Inc. - Murray Hill NJ
International Classification:
H01J 3726, G01N 2304
US Classification:
250311
Abstract:
A type of tomography is described, wherein occupancy of lattice sites in a microscopic sample of crystalline material is predicted. An electron beam is projected through the sample, at a specific angle, causing discernible spots in a detector, such as photographic film. Each spot corresponds to a row of atoms. The intensity of each spot indicates the number of atoms in the row, and the number is called a "line count. " Projecting the electron beam at specific additional angles produces additional line counts. From all the line counts, a set of equations is derived. Each variable in the equations corresponds to a lattice site in the material. A solution to the equations is found by linear programming techniques, thus assigning a value to each variable. Each value indicates the probability of occupancy of a respective lattice site.