An optical measurement apparatus capable of obtaining a highly accurate stereoscopic image is provided. The radiation angle of the light beam is changed by controlling the rotational speed of two motors that respectively rotate and drive the first optical path conversion unit and the second optical path conversion unit, and the light beam is emitted to the front three-dimensional region. Three-dimensional data of the object to be measured is obtained by obtaining reflected light and calculating with a computer. Then, the amount of play (vibration) in the axial direction of a rotating mechanism such as a motor shaft that emits light rays is measured in real time, and the amount of play and play is subtracted from the three-dimensional image obtained by the computer to cancel them. Thus, a highly accurate stereoscopic image is obtained. [Selection] Figure 1【課題】 高精度な立体画像を得ることができる光学式測定装置を提供する。【解決手段】 第１光路変換手段と第２光路変換手段とを各々回転駆動させる２個モータの回転数を制御することで光線の放射角度を変化させ、光線を前方の３次元領域に放射し反射光を得てコンピュータで計算することにより、被測定物の立体データを得る。そして、光線を放射するモータ軸等の回転機構の軸方向のガタや遊びの量（振動量）をリアルタイムで計測し、コンピュータに得られた立体画像にそのガタや遊びの量を差し引きし相殺することで、高精度な立体画像を得る。【選択図】 図１
