Figure 6.

SHG polarization images from the stretched rat-tail tendon collagen sample used to determine ρ. (a,b) SHG images of the collagen sample with excitation polarization (indicated by the arrows) mostly parallel (a) and perpendicular; (b) to the fiber orientations; (c) The value of ρ for each pixel, calculated as $\rho =\sqrt{I_{\left|\right|}/I_{\perp }}$. The white square indicates the area used to determine a value of 1.36 ± 0.01 for ρ.