Pupil wobble in point-scanning retinal optical coherence tomography systems.

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

Ngôn ngữ: eng

Ký hiệu phân loại:

Thông tin xuất bản: United States : Optics letters , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 707422

Optical coherence tomography (OCT) systems utilize 2D scanning methods to acquire reflectance-based volumetric images of samples, such as the human retina, with micrometer-scale depth resolution. A common method for performing this scanning at high speeds is to use a pair of sequential, single-axis galvanometer scanners. An undesired effect of using separated scanners is the variation in the beam position at the pupil plane, a phenomenon known as beam wander or pupil wobble. This can lead to loss of signal and vignetting artifacts in the resulting images. To overcome these limitations, we propose a method to deterministically analyze the pupil wobble in a given retinal OCT system and to correct for the displacement using pupil tracking OCT with a 2D scanning mirror placed anti-conjugate to the pupil plane. We demonstrate that we can model the pattern of pupil wobble present in any OCT system both theoretically and empirically and then use a pupil tracking system to correct for the displacement of the beam to acquire OCT images without the imposed artifacts.
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