Needle-shaped beam by a novel diffractive optical element for the extended depth-of-focus of optical coherence tomography

Jingjing Zhao; Yonatan Winetraub; Edwin Yuan; Adam de la Zerda

doi:10.1117/12.2583288

5 March 2021 Needle-shaped beam by a novel diffractive optical element for the extended depth-of-focus of optical coherence tomography

Jingjing Zhao, Yonatan Winetraub, Edwin Yuan, Adam de la Zerda

Author Affiliations +

Proceedings Volume 11630, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXV; 116301I (2021) https://doi.org/10.1117/12.2583288
Event: SPIE BiOS, 2021, Online Only

Abstract

Optical coherence tomography can acquire the entire depth-resolved profile of the sample at a single shot (A-scan). However, the lateral resolution changes with depth, achieving the smallest focus at the focal plane and increasing significantly with the defocusing distance, especially for the high numerical aperture lens. In order to maintain a high resolution over a large depth range, a novel diffractive optical element is developed to construct a needle-shaped beam with a depth-of-focus of 10- to 150-fold Rayleigh lengths, a relatively constant diameter, a uniform axial intensity distribution, and negligible sidelobes. The lateral resolution improvement is experimentally demonstrated.

Conference Presentation

Citation Download Citation

Jingjing Zhao, Yonatan Winetraub, Edwin Yuan, and Adam de la Zerda "Needle-shaped beam by a novel diffractive optical element for the extended depth-of-focus of optical coherence tomography", Proc. SPIE 11630, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXV, 116301I (5 March 2021); https://doi.org/10.1117/12.2583288

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