Real time FPGA resampling for swept source optical coherence tomography
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United States of America Patent
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Aug 27, 2019
Grant Date -
Jan 28, 2016
app pub date -
Jul 27, 2015
filing date -
Jul 25, 2014
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Abstract
Real-time swept source OCT data is most often sampled using a specially cut hardware k-clock. The present invention involves mathematically resampling signals within an FPGA-based data acquisition board based on data sampled from a wide free spectral range reference interferometer. The FPGA can then multiply up the reference clock rate to achieve greater imaging depth. The Nyquist fold-over depth can thus be programmed from a standard reference to an arbitrary depth, much as PLL frequency synthesizer can produce many frequencies from a standard stable reference. The system is also capable of real-time performance.
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