Off-axis full-field swept-source optical coherence tomography using holographic refocusing

Dierck Hillmann; Gesa Franke; Laura Hinkel; Tim Bonin; Peter Koch; Gereon Hüttmann

doi:10.1117/12.2006436

20 March 2013 Off-axis full-field swept-source optical coherence tomography using holographic refocusing

Dierck Hillmann, Gesa Franke, Laura Hinkel, Tim Bonin, Peter Koch, Gereon Hüttmann

Proceedings Volume 8571, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVII; 857104 (2013) https://doi.org/10.1117/12.2006436
Event: SPIE BiOS, 2013, San Francisco, California, United States

Abstract

We demonstrate a full-field swept-source OCT using an off-axis geometry of the reference illumination. By using holographic refocusing techniques, a uniform lateral resolution is achieved over the measurement depth of approximately 80 Rayleigh lengths. Compared to a standard on-axis setup, artifacts and autocorrelation signals are suppressed and the measurement depth is doubled by resolving the complex conjugate ambiguity. Holographic refocusing was done efficiently by Fourier-domain resampling as demonstrated before in inverse scattering and holoscopy. It allowed to reconstruct a complete volume with about 10μm resolution over the complete measurement depth of more than 10mm. Off-axis full-field swept-source OCT enables high measurement depths, spanning many Rayleigh lengths with reduced artifacts.

Citation Download Citation

Dierck Hillmann, Gesa Franke, Laura Hinkel, Tim Bonin, Peter Koch, and Gereon Hüttmann "Off-axis full-field swept-source optical coherence tomography using holographic refocusing", Proc. SPIE 8571, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVII, 857104 (20 March 2013); https://doi.org/10.1117/12.2006436

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