Fig. 3.

Top row shows dark field images and bottom row confocal images. The range of the extinction coefficients is displayed in between rows. The images from left to right with γ = 0.11 mm⁻¹, γ = 0.00 mm⁻¹, γ = 0.18 mm⁻¹ and γ = 0.02 mm⁻¹. Bar indicates 50 μm.