PROBLEM TO BE SOLVED: To provide an internal observation device such as an endoscope enabling shortening the time required for detecting an object to be observed (for example, blood vessel), and detecting a region deeper than before.SOLUTION: An internal observation is performed in which illumination light is radiated to a minute area on a surface of an object that has light scattering property (for example, bio tissue) and its rear scattering light is detected. By making an area of a detection region larger than an illumination region, a detection light quantity is increased with a simple and low-cost configuration. Presence of a measurement target is confirmed in the data that is obtained by a detection part. An analysis part is provided in which, based on a distance between the illumination position and a position at which the measurement target is confirmed, the position information including depth of the measurement target in the scattering body is obtained. The illumination part and the detection part perform measurement without contacting to the scattering body.COPYRIGHT: (C)2015,JPO&INPIT【課題】観察すべき物体(例えば血管)の検出に要する時間を短縮したり、従来より深い領域を検出できる内視鏡等の内部観察装置を提供する。【解決手段】光散乱性を有する対象(例えば生体組織)表面の微小面積に照明光を照射しその後方散乱光を検出するようにした内部観察を実行し、検出領域の面積を照明領域よりも大きくすることにより、簡便かつ安価な構成で検出光量を増やし、検出部により取得されたデータにおいて測定対象の存在の有無を確認し、照射位置と前記測定対象が確認された位置との距離から、散乱体における前記測定対象の深度を含めた位置情報を求めるように構成された解析部とを備え、照明部と前記検出部が前記散乱体に非接触で計測を行う。【選択図】図2
