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Real time signal processing and data handling with dedicated hardware in handheld OCT device

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Academic year: 2020

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Figure 1. The Michelson interferometer. The reference mirrors and sample are positioned at distances l r  and ls respectively from the beamsplitter (BS)
Figure 2. Proposed architecture for OCT data retrieval. Different channels are demodulated to build the  A-Scan line
Table 1. Fundamental Rules for Fixed-point manipulation.  Input Representation  Q(ml,nl) + Q(ml,nl)  Q{m\,n\) * Q{m2,n2)  Q(ml,nl)/Q(na,n2)  Sum(g(ml,ral),/ times)  Sqrt(g(ml,ral))  Output Representation Q(mí + Í,ní) Q(mí+m2+í,ní+ri2) Q{mí+n2+í,ní-n2) Q{ml + log2{i),nl)  g(upper(ml/2), ral/2)  Observation
Figure 4. Possible pole locations for three-magnitude-bit coefficient quantization in the standard direct I  second order section (left) and coupled -form order (right)
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