Single-Fiber Based Endoscopic Imaging: Methods and Characteristics
Chengfang Xu1,2,3, Bin Zhuang1,3, Zhaoxin Wu2 and Liyong Ren1,4,*
1State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics,
2Department of Electronics Science and Technology, School of Electronic and Information Engineering, Xi’an
3University of Chinese Academy of Sciences, Beijing 100049, China
4School of Physics and Information Technology, Shaanxi Normal University, Xi’an 710119, China
Abstract: Different from imaging an object through a multimode optical fiber (MMF) directly, it is much more challenging to use a single MMF for practical endoscopic imaging in which the light wave has been distorted twice: on the way in for the illumination and on the way out for the detection. In this paper, based on obtaining the optical transmission matrix (TM) of the MMF working in the reflective mode, we demonstrate that, via the measured optical TM, the object can be reconstructed directly from its round-trip distorted output speckle fields. Compared with other single-fiber based endoscopic imaging methods, our method doesn’t involve any scanning operation during the imaging process. Such an efficient method might have potential applications for wide-field and ultrathin fiber endoscopic imaging.
Keywords: Single-fiber imaging, Transmission matrix, Endoscopic imaging, Computational imaging.