PROBLEM TO BE SOLVED: To provide a technique capable of collecting polarization properties of the number of lines more than the conventional one with respect to the number of lines of an acquired interference light signal.SOLUTION: The diagnostic imaging apparatus periodically changes over polarization states of light transmitted by a light transmission/reception part on the basis of a pulse signal according to A line representing a period of a light source. Data of interference light between light received by the light transmission/reception part and reference light are acquired according to the pulse signal. When N (N is an integer of 2 or greater) is the number of polarization states for one period in the changeover, each time data are acquired, the polarization characteristics are acquired on the basis of the data and (N-1) data continuously acquired on and after the data acquisition.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】取得した干渉光信号のライン数に対し、従来よりも多くのライン数の偏光特性を収集可能な技術を提供する。【解決手段】光源の周期を表すAラインに応じたパルス信号に基づいて、光送受信部が送信する光の偏光状態を周期的に切り替える。光送受信部が受信した光と参照光との干渉光のデータを、上記パルス信号に従って取得する。切り替えにおける1周期分の偏光状態の個数をN(Nは2以上の整数)とすると、データを取得するたびに、該データと、該データの取得以降に連続して取得する(N-1)個のデータと、に基づいて偏光特性を求める。【選択図】図2
