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5 March 2021 Predicting the spectral domain optical coherence tomography point spread function rolloff without an interferometer
Aaron M. Kho, Jun Zhu, Tingwei Zhang, Vivek Srinivasan
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Proceedings Volume 11630, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXV; 116301K (2021) https://doi.org/10.1117/12.2582610
Event: SPIE BiOS, 2021, Online Only
Abstract
Measuring the point spread function (PSF) rolloff is a time-consuming part of spectral/Fourier domain Optical Coherence Tomography (SD-OCT) system characterization. Here, we introduce a method that predicts the PSF (sensitivity and axial resolution) rolloff without an interferometer. Instead, the method analyzes correlations of incoherent excess noise from the light source across the detector array to characterize the spectrometer response. We demonstrate this technique using supercontinuum and superluminescent diode sources, showing that a noise time course of just 0.5 seconds predicts axial imaging performance, as confirmed by meticulous measurements using a Michelson interferometer. This approach promises to facilitate SD-OCT system development.
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Aaron M. Kho, Jun Zhu, Tingwei Zhang, and Vivek Srinivasan "Predicting the spectral domain optical coherence tomography point spread function rolloff without an interferometer", Proc. SPIE 11630, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXV, 116301K (5 March 2021); https://doi.org/10.1117/12.2582610
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KEYWORDS
Point spread functions
Optical coherence tomography
Interferometers
Spectral resolution
Spectroscopy
Imaging systems
Light sources
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