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Physics Colloquium Series: Professor Ping Yu
(Physics Lecture Series) University of Missouri, Department of Physics & Astronomy
“Airy Beam for Optical Biomedical Imaging”
Since the invention of the laser, Gaussian beam has been extensively used in optical imaging. In most biomedical coherence domain imaging modalities, the light beam is focused into a small diameter so that high lateral resolution is possible. In addition, the beam should maintain a small size in axial direction for a distance called Rayleigh length or depth of field (DOF). Gaussian beam has a fundamental limitation in the DOF due to its diffraction, which gives a trade-off between the lateral resolution and the total image depth. Recently, structured Airy light beams have been developed. In this talk, I will give our recent results on the development of optical coherence tomography using a finite energy Airy beam to improve the DOF. I will discuss technical challenges of how to use modified Airy beam for imaging applications. I will also show some results of using the developed Airy beam technique to study biological tissue.