The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 1987
Filed:
Mar. 11, 1985
Syunji Yamamoto, Itami, JP;
Tadatoshi Yamada, Kobe, JP;
Masao Morita, Itami, JP;
Tetsuya Matsuda, Kawanishi, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A process and apparatus for correcting a crude magnetic field of a main field generator having correcting magnetic field generators associated therewith to produce a substantially homogeneous corrected field. The process comprises the steps of measuring the distribution of said crude magnetic field at a plurality of points, expressing the crude magnetic field at each of the plurality of different measured points by a polynomial equation which contains a main homogeneous magnetic field component, successively higher order inhomogeneous magnetic field components, and a residual, determining the magnetic field output for the correcting generators such that the successively higher order inhomogeneous magnetic field components of the crude magnetic field are completely cancelled by the magnetic field outputs, respectively, of the correcting generators, and producing and superpositioning on the crude magnetic field the determined magnetic field output from the correcting generators.