The present invention by achieving both high-speed scanning and large scan range, two-dimensional data, further provides an optical coherence tomography apparatus that enables the collection of high-speed three-dimensional data. A light source 1 for outputting a low coherence light to a subject T, a beam splitter 2 for outputting said a low interference light of two of the reference light L1 is divided in the direction measurement light L2, the a flatbed scanning unit 10 to irradiate to a plane scanning the measurement light to the subject, a light detection means 7 for detecting light and the reference light and the reflected light is combined in the beam splitter, said optical detection means in analyzes the interference of light detected and a signal processing unit 8 for generating an optical tomographic image of the subject, the planar scanning means, at least two electrooptical provided in the optical path of the measurement light optical coherence tomography, characterized by a plane scanning the measurement light on the Lissajous figure by deflecting the measurement light by applying a voltage to the crystal 41 and 51 in the same direction as the application direction of the voltage.FIELD 4【課題】高速スキャンと大きいスキャン範囲とを両立させて、2次元データ、さらには、3次元データの高速での収集を可能とする光干渉断層装置を提供する。【解決手段】被検体Tに低干渉光を出力する光源1と、前記低干渉光を2つの方向に分割して参照光L1と測定光L2として出力するビームスプリッタ2と、前記被検体に対して前記測定光を平面走査して照射する平面走査手段10と、前記参照光と前記反射光とが前記ビームスプリッタで結合した光を検出する光検出手段7と、前記光検出手段で検出された光の干渉を解析して前記被検体の光断層画像を生成する信号処理装置8とを備え、前記平面走査手段は、前記測定光の光路上に設けられた少なくとも2つの電気光学結晶41,51に電圧を印加することで当該測定光を当該電圧の印加方向と同じ方向に偏向することにより前記測定光をリサジュー図形に平面走査することを特徴とする光干渉断層装置。【選択図】図4
