| 摘要 |
PURPOSE: A displaying device of the irradiated position of radioactive rays is provided to improve the interchangeability by optionally adjusting the angle and the direction of a reflecting plate. CONSTITUTION: A cylindrical supporting member(20) is fixed in an inner wall located inside of a window. A perforation hole(20a) is formed in the supporting member. A reflecting mirror is rotatable by installing a shaft pin(21a) inside the supporting member. Light to display the position to be irradiated from the supporting member is reflected to a wanted position. By adjusting the position of a support of the reflecting mirror, the production cost is reduced.
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