PROBLEM TO BE SOLVED: To provide an optical system that is compact and suitable for the generation of a sheet beam and an endoscope apparatus comprising the same.SOLUTION: An optical system has a light guide member (102, 104) that guides incident light, a reflection member (107) that reflects light emitted from the light guide member toward an object, and rotation means (105) that rotates a part of the light guide member (104) and the reflection member (107) so as to keep the relative position between the part of the light guide member (104) and the reflection member (107).COPYRIGHT: (C)2016,JPO&INPIT【課題】小型でシートビームの生成に有利な光学系およびそれを備えた内視鏡装置を提供すること。【解決手段】光学系は、入射光を導光する導光部材(102,104)と、該導光部材から出射する光を物体に向けて反射する反射部材(107)と、前記導光部材の一部(104)と前記反射部材(107)との相対位置を維持するように、前記導光部材の前記一部および前記反射部材を回転させる回転手段(105)と、を有することを特徴とする。【選択図】図1
