PROBLEM TO BE SOLVED: To enable faster and more accurate measurement in a larger portion of a measuring object.SOLUTION: A distance information acquisition device comprises: a light output part for outputting light that irradiates an object a light receiving part for receiving the light reflected by the object a bifurcation part for bifurcating the light output by the light output part into irradiation light that irradiates the object and reference light that reaches the light receiving part on a path different from the irradiation light a light condensing part with a lens for condensing the irradiation light at the object a light condensing position adjustment part with a focus variable lens for changing a light condensing position of the irradiation light in the object and a distance information acquisition part for acquiring information showing distances to a reference position at a plurality of positions of the object in accordance with the light condensing position of the irradiation light on the basis of the interference between the irradiation light and the reference light in the light received by the light receiving part.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2016,JPO&INPIT【課題】測定対象物のより大きな部分について、より高速に、かつ、より高精度に測定を行えるようにする。【解決手段】距離情報取得装置が、対象物に照射される光を出力する光出力部と、前記対象物で反射された光を受光する受光部と、前記光出力部が出力した光を、前記対象物に照射される照射光と、前記照射光とは異なる経路で前記受光部に到達する参照光とに分岐させる分岐部と、レンズを具備し、前記照射光を前記対象物にて集光させる集光部と、焦点可変レンズを具備し、前記照射光の前記対象物における集光位置を変化させる集光位置調節部と、前記受光部が受光した光における前記照射光と前記参照光との干渉に基づいて、前記照射光の集光位置に応じて前記対象物の複数箇所について、基準位置との距離を示す情報を取得する距離情報取得部と、を具備する。【選択図】図4
