PROBLEM TO BE SOLVED: To optimize a photographable range in a depth direction by a relationship with resolving power in an imaging technique using an optical coherence tomography.SOLUTION: An optical interference tomography imaging device 1 comprises: a light source 21； an interference light creation unit 22 that makes light from the light source branch, makes one branch light enter an imaged object via an objective lens, condenses light reflected from the imaged object by the objective lens, and makes interference light create by multiplexing other branch light； a detection unit 26 that detects the interference light； and a signal processing unit 33 that obtains a reflection light intensity distribution of the imaged object on the basis of a spectrum of the detected interference light. The signal processing unit is configured to: implement a spectrum conversion having a conversion characteristic in which a light source spectrum is converted into a Gauss distribution curve with respect to the spectrum of the interference light； and obtain the reflection light intensity distribution of the imaged object by Fourier-transforming a post-spectrum conversion spectrum, in which in the conversion characteristic, a center wavelength of the light source spectrum and a center wavelength of the Gauss distribution curve are different.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】光コヒーレンストモグラフィを用いた撮像技術において、奥行き方向の撮像可能範囲を分解能との関係で最適化する。【解決手段】光干渉断層撮像装置１は、光源２１と、光源からの光を分岐させ、一の分岐光を対物レンズを介して被撮像物に入射させ、被撮像物から反射された光を対物レンズで集光し他の分岐光と合波して干渉光を生じさせる干渉光生成部２２と、干渉光を検出する検出部２６と、検出された干渉光のスペクトルに基づき被撮像物の反射光強度分布を求める信号処理部３３とを備える。信号処理部は、光源スペクトルがガウス分布曲線に変換される変換特性を有するスペクトル変換を、干渉光のスペクトルに対して実行し、スペクトル変換後のスペクトルをフーリエ変換することで被撮像物の反射光強度分布を求める。変換特性においては光源スペクトルの中心波長とガウス分布曲線の中心波長とが異なる。【選択図】図１
