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电视机品牌排行榜专利名称：HELMHOLTZ COIL 发明人：TAKANO ICHIROU 申请号：JP9218381
申请日：19810617
公文的种类公开号：JPS57207306A
全能自恋香港和台湾公开日：唐伞小僧
养老金计发月数19821220
专利内容由知识产权出版社提供
摘要：PURPOSE:To impart excellent performance in magnetic field uniformity to a coil system, by constituting two circular coils having a fan shaped cross ction. CONSTITUTION:The circular coils 3 and 4, which have the fan shaped cross ction, face each other. The directions of currents are the same. It is natural to describe the coil system having said cross ction by polar coordinates. Their magnetic fields are expanded by r<2n> (wherein r is the distance between an obrving point P and an original point O, and n is an integer) and a Legendre's function. Since the expansion equation and the coordinate system which describes the coil shape are the same, the magnetic uniformity is improved in a spherical space having a constant radius. Furthermore the volume occupied by the coil system is reduced.
蜀字开头的成语申请人：TOKYO SHIBAURA DENKI KK
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