橢偏儀反演

從光譜橢偏儀Ψ、Δ資料擬合n(λ)、k(λ)和d。單角度或多角度。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.