PROBLEM TO BE SOLVED: To provide an easy-to-assemble and small-diameter scanning type observation device using a wide-angle light detection member having a wide light detection angle, the wide light detection angle being configured not to decrease even if liquid is attached to an end of the observation device.SOLUTION: A scanning type observation device comprises a scanning illumination optical system 10 to vibrate an illumination light fiber 10a to scan illumination light on an object, and at least one wide-angle light detection member 11 disposed laterally to the scanning illumination optical system 10. The wide-angle light detection member 11 comprises a detection light fiber 1 to receive light, a detection angle enlarging surface 4 (4) disposed at a tip of the detection light fiber 1 to enlarge a detection angle, and sealing means 5 (5) to seal the detection angle enlarging surface 4 (4), the sealing means having a refractive index different from that of an optical element located backwardly nearby the detection angle enlarging surface 4.COPYRIGHT: (C)2015,JPO&INPIT【課題】細径を維持しながら取り込み角を広角化でき、且つ、先端の液体付着によっても取り込み角が減少せず、さらに組立も容易化できる広角光検出部材を用いた走査型観察装置を提供する。【解決手段】照明用光ファイバ10aを振動させて対象物上で照明光を走査する走査照明光学系10と、走査照明光学系10の側方に、少なくとも一つの広角光検出部材11を有し、広角光検出部材11は、光を受光する検出用光ファイバ1と、検出用光ファイバ1の先端に設けられた、取り込み角を拡大させる取り込み角拡大面4(4’)と、取り込み角拡大面4の後方近傍に位置する光学要素の屈折率と異なる屈折率を持ち、取り込み角拡大面4(4’)を封止する封止手段5(5’)を有する。【選択図】図7
