2023/05/26 by Ningzhi Xie, Xie, Ningzhi, Quentin A. A. Tanguy +7 · 1 citation
Engineering · #FOS: Physical sciences #Optical Coherence Tomography Applications #Optics (physics.optics)
paper · pdf · doi:10.48550/arxiv.2305.17113
openalex publication_date 2023/05/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
With the advent of neuroimaging and microsurgery, there is a rising need for capturing images through an optical fiber. We present an approach of imaging through a single fiber without mechanical scanning by implementing spatial-spectral encoding. The spectral encoding is achieved through a microfabricated spectral filter array, where light from different spatial pixels is coded with a highly orthogonal spectrum. The image is then computationally recovered via pseudo inverse of the encoding process. We demonstrate imaging of a 4 × 4 binary object at the proximity of the spectral filter array using 560-625nm wavelength band. The recovered image maintains an error rate of <11% when measured using a spectrometer with a spectral resolution of 1.5nm. The image remains unchanged with fiber bending or moving. Thus our approach shows a more robust way to image through a single optical fiber, with potential applications in compact endoscopes and angioscopes.