Being the hot reactor introspective observing/thinking

摘要

PROBLEM TO BE SOLVED: To provide a small and lightweight observation device of a high temperature furnace, and can use a cooling device whose size as comparatively small.;SOLUTION: In the observation device in the high temperature furnace provided with an image pickup unit, a reflection type filter at the front part of this image pickup unit and an infrared absorption filter at an interval between this reflection type filter and the image pickup unit, are provided. Further, this reflection type filter in the observation device in the high temperature furnace, is formed of a metallic film having the composition of 80-100 wt.% platinum on the one side surface or the both surfaces of a base board.;COPYRIGHT: (C)2004,JPO