| 摘要 |
PURPOSE:To make possible the correct positioning of an optical element and besides carry it out automatically by installing a rotary member in such manner that it may slip at more than a prearranged resistance value and providing a stopper which serves as a rotation reference of a rotary member. CONSTITUTION:Four holes are provided through boring process on a filter rotary plate 7 and three holes of them have each three filters 13 to 15 fixed with adhesive. The rotary plate 7 is fixed on a shaft 22 of a step motor 2 with a slide seat 6, corrugated leaf spring 5 and an adjustment nut 4. On the rotary plate 7, a protrusion 8 which serves as a stopper is fixed and on a stand 1, a stop 25 which runs into the stopper 8 is installed. On the stand 1, a base 12 for a spectroscope is fixed. Under this constitution, it is possible to make easy an automatic positioning and improve a reproducibility with an accurate action. |
