| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a magnetic field generating device capable of enhancing the intensity of a center magnetic field by suppressing a leak magnetic field while suppressing an increase in the weight of the device itself. <P>SOLUTION: This magnetic field generating device 10 includes a device body 12 formed into an annular shape using a plurality of permanent magnets so as to have a magnetic field generating space 32. Shield members 34a - 40a with a thickness of 5 - 35 mm are provided to the outer periphery of the device body 12 so as to be separated from the surfaces of the permanent magnets by 0 - 35 mm. The shield members 34a - 40a have a saturated magnification of 1.5T or more. Insertion members 34b - 40b with a saturated magnification of 0.2T or less are provided between the permanent magnets and the shield members 34a - 40a. <P>COPYRIGHT: (C)2004,JPO |
