OPTICAL RANGE FINDER

To provide a technique of, in an optical range finder, suppressing incidence of disturbance light on each light receiving pixel used in range-finding by setting a light transmittance corresponding to the signal strength of the disturbance light individually for each light receiving pixel.SOLUTION: An optical range finder 200 is provided. This optical range finder comprises: a light receiving part 60 that includes a plurality of light receiving pixels 66 for receiving incident light and outputs a detection signal corresponding to the light receiving intensity of the incident light from each of the plurality of light receiving pixels; a filter 72 arranged at a light path of the incident light and setting a light transmittance for each of the plurality of light receiving pixels; and a controller 100 for acquiring the light receiving intensity of the disturbance light and calculating the distance to an object OB using the detection signal output from the light receiving pixel for which the light transmittance to reduce the acquired light receiving intensity of the disturbance light has been set.SELECTED DRAWING: Figure 1 【課題】光測距装置において、外乱光の信号強度に応じた光透過率を各受光画素に個別に設定し、測距に用いられる各受光画素に外乱光が入射することを抑制することができる技術を提供する。【解決手段】光測距装置２００が提供される。この光測距装置は、入射光を受光するための複数の受光画素６６を有し、前記入射光の受光強度に応じた検出信号を前記複数の受光画素のそれぞれから出力する受光部６０と、前記入射光の光路に配置され、前記複数の受光画素のそれぞれに光透過率を設定するフィルタ７２と、外乱光の受光強度を取得し、取得した前記外乱光の受光強度を低減させるための光透過率を設定された前記受光画素から出力された前記検出信号を用いて、対象物ＯＢまでの距離を算出する制御装置１００と、を備える。【選択図】図１