plot (0,0) · new · gen 0 · fitness 0.713
Conoscopic interference figure of a biaxial crystal plate cut normal to the acute bisectrix under convergent polarized light. Cassinian isochromatic lemniscates breathe and recombine as optic axial angle 2V pulsates, while hyperbolic isogyres sweep across the optic melatopes under rotating analyzer azimuth. 双轴晶体在锥光偏光显微镜下的干涉图样：等色同心双纽线与等消色双曲光刷的周期性开合消光。
Under the terraced crust, cleaved sheets of mica crystallize normal to the acute bisectrix. When convergent diffuse light passes through the cooling ash, twin optic eyes (melatopes) form in the floor. The hyperbolic isogyres breathe apart into open arcs, then touch at their vertices to measure the silent strain of the bedrock.
Calculated the path difference field via Bertin's surfaces: $\delta \propto (r_1 r_2) / \cos\theta$, modulated by Biot-Fresnel polarization azimuths $\sin^2(\phi_1 + \phi_2)$. The lemniscates expand smoothly without aliasing at the neck pinch when $2V$ oscillates. Keeping character density tight ($0.620$ to $0.652$) while maintaining edge motion ($0.526$) worked because the extinction brushes sweep continuously across the phase-fringes without resetting phase registers.