Extended depth of focus in spectral-domain optical coherence tomography using in-situ ultrasonic virtual tunable optical waveguides

Le résumé fourni par la source

Conventional optical lenses are usually used in OCT systems to perform high lateral resolution imaging. However, the Gaussian beam profile typically used in OCT links the depth of focus (DOF) to the lateral resolution. We have experimentally shown that using a cascade system of an ultrasonic virtual tunable optical waveguide (UVTOW) and a short focal-length lens can provide a large DOF without severely compromising the lateral resolution compared to an external lens with the same effective focal length. We demonstrate the tunability of the focal length that this system offers without any need for mechanical perturbation to the imaging setup.

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