Patent ID: 6448772
Filing Date: 2002-09-10
Classification: G01R

Abstract:
A magnet field adjusting apparatus for adjusting a magnetic field of a space in a magnetic field generator including a pair of plate yokes opposed to each other and a permanent magnet disposed on an opposed surface of each plate yoke, comprising:means for measuring a magnetic field strength at a predetermined position in the space; means for storing in memory an amount of change in the magnetic field caused by placement of a magnetic field adjusting piece at a predetermined location of the magnetic field generator; means for inputting a target value for a magnetic uniformity; means for calculating a location and the number of the magnetic field adjusting pieces based on the magnetic field strength, the amount of change in the magnetic field and the target value; means for calculating a value corresponding to an expected magnetic field uniformity based on the location and the number of the magnetic field adjusting pieces; and means for outputting the location and the number of the magnetic field adjusting pieces if the value corresponding to the expected magnetic field uniformity is not greater than a predetermined value.