2019/05/23 by Viktor Tsvirkun, Siddharth Sivankutty, Tsvirkun, Viktor +13
Engineering · Physics and Astronomy · #Optical Coherence Tomography Applications #Random lasers and scattering media #Orbital Angular Momentum in Optics
paper · pdf · doi:10.48550/arxiv.1905.09643
The lensless endoscope represents the ultimate limit in miniaturization of\nimaging tools: an image can be transmitted through a (multi-mode or multi-core)\nfiber by numerical or physical inversion of the fiber's pre-measured\ntransmission matrix. However, the transmission matrix changes completely with\nonly minute conformational changes of the fiber, which has so far limited\nlensless endoscopes to fibers that must be kept static. In this letter we\nreport for the first time a lensless endoscope which is exempt from the\nrequirement of static fiber by designing and employing a custom-designed\nconformationally invariant fiber. We give experimental and theoretical\nvalidations and determine the parameter space over which the invariance is\nmaintained.\n