Fig. 3.

A- Plot of normalized signal ratio epi/DIVER detectors vs. imaging depth in 3mm thick samples: 1- clear sample (no ink and TiO₂ added); 2- sample with ink added (μ_a = 0.1mm⁻¹, no TiO₂); 3- sample with lower scattering (μ_s = 3.5mm⁻¹, no ink); 4- sample with lower scattering and ink (μ_s = 3.5mm⁻¹; μ_a = 0.1mm⁻¹); 5- sample with higher scattering (μ_s = 10mm⁻¹, no ink). λ_exc 800nm. B- Explanation for better DIVER performance at increased imaging depth in clear samples: the effective NA for the DIVER detector increases with depth, while remains the same for the epi-detector.