OPHTHALMIC IMAGING WITH K-MIRROR SCANNING, EFFICIENT INTERFEROMETRY, AND PUPIL ALIGNMENT THROUGH SPATIAL FREQUENCY ANALYSIS
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United States of America Patent
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Issued Date -
Aug 18, 2022
app pub date -
Jul 30, 2020
filing date -
Aug 1, 2019
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Abstract
Various techniques for providing a low-cost ophthalmic imaging system, such an OCT or fundus imagers are presented. Cost is reduced by using a K-minor as a scanning component. The K-mirror is positioned at a retina conjugate. A beam splitter is positioned at the pupil conjugate and may be used to provide pupil splitting functionality. The beam splitter's shape and area conform to the focal light footprint of an illumination source such that it spans only a fraction of a collection window. 2D FFT is applied to capture spectra for purposes of selectively removing complex conjugate components and for extracting patient pupil to system collection pupil alignment. Consequently, pupil alignment is achieved by use of captured OCT data without the need for additional pupil cameras.
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