| 摘要 |
PROBLEM TO BE SOLVED: To select and form a plurality of kinds of periodical magnetic fields in accordance with the characteristics of a orbital radiation light by continually joining divided insert light sources having a plurality of upper side and under side magnet arrays, by synchronously driving for switching the magnet arrays and for adjusting the intervals between the upper and under magnet arrays. SOLUTION: Divided insert light sources 1D1-1D3 composed of an under side magnet array switch driving mechanism, an upper side magnet array switch driving mechanism and a magnet array interval adjustment driving mechanism are joined. A pulse motor 9 and a bevel gear box 10 as driving machines are disposed on the ceiling part of an angular support column of the center divided insert light source 1D2. One output shaft of the bevel gear box 10 is sequentially coupled to the ball screw driving shaft SA of a worm gear box 8A of the divided insert light source 1D2 and respective ball screw driving shafts SA of worm gear boxes 8 and 8A of the divided insert light source 1D3 by a synchronizing coupling shaft SS having a coupling. Thereby, a driving force of the pulse motor 9 can be transferred to the divided insert light sources 1D1-1D3 with no trouble.
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