椭偏仪反演

从光谱椭偏仪Ψ、Δ数据拟合n(λ)、k(λ)和d。单角度或多角度。Cauchy + Urbach色散模型。

Cauchy + Urbach dispersion model fit by bounded gradient-descent. Multi-angle data resolves the (n, d) ambiguity of single-angle measurements. Built-in synthetic demo dataset; CSV upload supported.