Three-dimensional beam focusing control for lensless vascular endoscopes using local wavefront control

Masaki Hisaka

doi:10.1117/12.2319167

24 April 2018 Three-dimensional beam focusing control for lensless vascular endoscopes using local wavefront control

Masaki Hisaka

Proceedings Volume 10711, Biomedical Imaging and Sensing Conference; 107111N (2018) https://doi.org/10.1117/12.2319167
Event: SPIE Structured Light, 2018, Yokohama, Japan

Abstract

In this study, the focusing beam generated by an optical fiber bundle having locally optical delay has been investigated to simplify the structure of vascular endoscopes. The wavefront propagating within each fiber core is delayed locally by an optical delay system. Each diffraction beam emitted from the fiber core forms a superimposed convergent wave. The optical delays make arbitrary beam focusing after the light exits the bundle. We have demonstrated the beam focusing and three-dimensional scanning of the beam using a liquid lens. In this experiment, six points of unnecessary convergent light, which depended on the hexagonal lattice structures of the bundle, were also formed at the same time.

Citation Download Citation

Masaki Hisaka "Three-dimensional beam focusing control for lensless vascular endoscopes using local wavefront control", Proc. SPIE 10711, Biomedical Imaging and Sensing Conference, 107111N (24 April 2018); https://doi.org/10.1117/12.2319167

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