PROBLEM TO BE SOLVED: To provide a light amount adjustment mechanism having a simple structure and excellent operability.SOLUTION: A light amount adjustment mechanism of an endoscope includes a first polarizing plate 42 and a second polarizing plate 44 on an optical path. The first and second polarizing plates 42 and 44 are rotated around an optical axis to adjust an amount of light that transmits the first and second polarizing plates 42 and 44.COPYRIGHT: (C)2014,JPO&INPIT【課題】簡単な構成で、かつ、操作性の良い光量調整機構を提供する。【解決手段】内視鏡の光量調整装置は、光路上に、第1の偏光板42と第2の偏光板44を備える。第1または第2の偏光板42、44を光軸周りに回転させて、第1および第2の偏光板42、44を透過する光量を調整する。【選択図】図2
