Biomedical Engineering Reference
In-Depth Information
Figure 14.13
Four healthy RBCs. (A) True color representation superposed with the topological map. (B)
Negative log of the standard deviation of the changes in the real part of the RI superposed with
the topological map.
biologically relevant properties of samples, which would include their scattering,
anisotropy, absorption, and dispersion properties.
14.6 Conclusions
In contrast to the single-polarization, single-wavelength operation in conventional digital-
holography-based QPM systems, probing a sample with additional polarizations and
wavelengths generates a wealth of new information that can be exploited to markedly
enhance system performance and functionality.
As we have demonstrated in this chapter, information from these extra dimensions can be
acquired with a variety of configurations. Both the DQPM system and the SD-DIC system
take advantage of a Wollaston prism to create an orthogonal polarization component, which
shares similar noise characteristics with the original polarization, and hence greatly
facilitates noise reduction and stability improvement. While the DQPM technique takes a
full-field approach to capture high-speed dynamics across the entire object, SD-DIC is
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