Double-clad fiber-based handheld confocal scanning laser ophthalmoscope using a novel hybrid spiral scan pattern

Franklin Wei; Christian Viehland; Yuankai K. Tao; Anthony N. Kuo; Joseph A. Izatt; Al-Hafeez Dhalla

doi:10.1117/12.2608347

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7 March 2022 Double-clad fiber-based handheld confocal scanning laser ophthalmoscope using a novel hybrid spiral scan pattern

Franklin Wei, Christian Viehland, Yuankai K. Tao, Anthony N. Kuo, Joseph A. Izatt, Al-Hafeez Dhalla

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Proceedings Volume PC11941, Ophthalmic Technologies XXXII; PC1194112 (2022) https://doi.org/10.1117/12.2608347
Event: SPIE BiOS, 2022, San Francisco, California, United States

Abstract

We present a portable confocal scanning laser ophthalmoscope (cSLO) for high-resolution, widefield retinal imaging that uses a low-backreflection double-clad fiber for both illumination and collection to maintain robust alignment of confocal pinholes in a handheld form factor. The cSLO uses a new type of "hybrid spiral" scan pattern that is a hybridization of a constant angular velocity spiral with a constant linear velocity spiral. The hybrid spiral offers efficiency advantages over traditional raster scan patterns while serving as a natural fixation target. Feasibility of the system is demonstrated by imaging a human volunteer.

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Franklin Wei, Christian Viehland, Yuankai K. Tao, Anthony N. Kuo, Joseph A. Izatt, and Al-Hafeez Dhalla "Double-clad fiber-based handheld confocal scanning laser ophthalmoscope using a novel hybrid spiral scan pattern", Proc. SPIE PC11941, Ophthalmic Technologies XXXII, PC1194112 (7 March 2022); https://doi.org/10.1117/12.2608347

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