Characterization and optical correction of beam wander at the pupil plane in point-scanning ophthalmic OCT systems

Amit Narawane; Pablo Ortiz; Mark Draelos; Ryan P. McNabb; Anthony N. Kuo; Joseph A. Izatt

doi:10.1117/12.3005602

13 March 2024 Characterization and optical correction of beam wander at the pupil plane in point-scanning ophthalmic OCT systems

Amit Narawane, Pablo Ortiz, Mark Draelos, Ryan P. McNabb, Anthony N. Kuo, Joseph A. Izatt

Author Affiliations +

Proceedings Volume PC12830, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVIII; PC128300L (2024) https://doi.org/10.1117/12.3005602
Event: SPIE BiOS, 2024, San Francisco, California, United States

Abstract

Point-scanning OCT systems often use a pair of sequential, single-axis galvanometer scanners to acquire volumetric data. This can introduce uncertainty in the beam position at the ocular pupil plane, an effect known as beam wander or pupil wobble, which can distort the resulting images. We propose a new approach to characterize and optically correct the pupil wobble with an additional scanning mirror placed anti-conjugate to the pupil plane. We evaluate this method by modeling the pattern of pupil wobble present in a research OCT system both theoretically and experimentally, and correcting for it with the proposed method.

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Citation Download Citation

Amit Narawane, Pablo Ortiz, Mark Draelos, Ryan P. McNabb, Anthony N. Kuo, and Joseph A. Izatt "Characterization and optical correction of beam wander at the pupil plane in point-scanning ophthalmic OCT systems", Proc. SPIE PC12830, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVIII, PC128300L (13 March 2024); https://doi.org/10.1117/12.3005602

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KEYWORDS

Optical coherence tomography

Beam wander

Mirrors

Galvanometers

Image resolution

Mirror surfaces

Optical scanning systems

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