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9 March 2023 Extended depth of focus in spectral-domain optical coherence tomography using in-situ ultrasonic virtual tunable optical waveguides
Yasin Karimi, Hang Yang, Junze Liu, Hyle Park, Maysamreza Chamanzar
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Proceedings Volume PC12367, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVII; PC123670N (2023) https://doi.org/10.1117/12.2647472
Event: SPIE BiOS, 2023, San Francisco, California, United States
Abstract
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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Yasin Karimi, Hang Yang, Junze Liu, Hyle Park, and Maysamreza Chamanzar "Extended depth of focus in spectral-domain optical coherence tomography using in-situ ultrasonic virtual tunable optical waveguides", Proc. SPIE PC12367, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVII, PC123670N (9 March 2023); https://doi.org/10.1117/12.2647472
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KEYWORDS
Optical coherence tomography
Waveguides
Ultrasonics
Refractive index
Gaussian beams
Modulation
Signal to noise ratio
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