2016年 第77回応用物理学会秋季学術講演会

講演情報

一般セッション(口頭講演)

4 JSAP-OSA Joint Symposia 2016 » 4.2 Bio-and Medical Photonics

[15a-C31-1~9] 4.2 Bio-and Medical Photonics

2016年9月15日(木) 09:15 〜 12:15 C31 (日航3階孔雀AB)

西舘 泉(農工大)、藤田 克昌(阪大)

09:15 〜 09:30

[15a-C31-1] Full-field optical coherence tomography through digital holography

Nicolas Pavillon1、Nicholas Smith1 (1.Osaka University)

キーワード:Optical coherence tomography, 3D imaging

Optical coherence tomography (OCT) enables the measurement of the structural information of diffuse samples such as tissue in a non-invasive and label-free way, by retrieving a depth-resolved signal from the back-scattered part of the excitation light. In its original implementation, classically denoted as time-domain OCT, a three-dimensional scanning is required to retrieve an x-y image of the signal emitted by the back-scatterers at a certain depth z, with the signal being extracted from the interference pattern in depth.
Several approaches were developed to reduce the scanning requirements and improve the acquisition speed. On one hand, Fourier-domain OCT enables the recording of the whole depth information through the recording of a spectrally-resolved interferogram. In parallel, full-field temporal OCT has been proposed, where the detector is replaced by a 2D camera, enabling the acquisition of the tomogram directly through a scan in depth by recording the interference patterns in parallel. We present early results of a full-field OCT implementation where the signal retrieval is based on off-axis holography. The scanning speed can be significantly improved due to the ability of recovering both amplitude and phase from the spatially-modulated interferogram.