PROBLEM TO BE SOLVED: To provide an apparatus and method for acquiring an OCT tomographic image with high image quality by improving focus position deviation that becomes larger than that of the conventional one.SOLUTION: The optical coherence tomography apparatus according to the present invention includes: planar image acquisition means that acquires a planar image of a subject on the basis of return light from the subject to which irradiation means for applying first wavelength band light to the subject, applies light； tomography image acquisition means that acquires a tomography image of the subject on the basis of multiplexed light obtained by multiplexing the return light from the subject to which laser light is applied, while sweeping a second wavelength band longer than the first wavelength band, and reference light corresponding to the laser light； and correction means for correcting an optical path length difference generated by a difference between the first wavelength band and the second wavelength band.SELECTED DRAWING: Figure 12COPYRIGHT: (C)2017,JPO&INPIT【課題】従来よりも大きくなったピントの位置ずれを改善し、高画質なＯＣＴ断層画像を取得する装置および方法を提供する。【解決手段】本発明に係る光干渉断層撮影装置は、第１の波長帯域の光を被検体に照射する照射手段により照射した前記被検体からの戻り光に基づいて、被検体の平面画像を取得する平面画像取得手段と、第１の波長帯域よりも長い第２の波長帯域を掃引させながらレーザ光を照射した被検体からの戻り光と、該レーザ光に対応する参照光とを合波した光に基づいて、該被検体の断層画像を取得する断層画像取得手段と、第１の波長帯域と第２の波長帯域との差によって生じる光路長差を補正する補正手段と、を有する。【選択図】図１２
