Once the spectral optical constants are known, the effective spectral reflectance could be evaluated
Display Formula

(3)$\u211c\u22a5,\lambda =(na\u2009cos\u2009\psi \u2212u)2+v2(na\u2009cos\u2009\psi +u)2+v2$

Display Formula(4)$\u211c\u2225,\lambda =[(nh,\lambda 2\u2212\kappa h,\lambda 2)cos\u2009\psi \u2212nau]2+[2nh,\lambda \kappa h,\lambda \u2009cos\u2009\psi \u2212nav]2[(nh,\lambda 2\u2212\kappa h,\lambda 2)cos\u2009\psi +nau]2+[2nh,\lambda \kappa h,\lambda \u2009cos\u2009\psi +nav]2$

Display Formula(5)$\u211ceff,\lambda =\u211c\u22a5,\lambda +\u211c\u2225,\lambda 2$

Display Formula(6)$2u2=(nh,\lambda 2\u2212\kappa h,\lambda 2\u2212na2\u2009sin2\psi )+(nh,\lambda 2\u2212\kappa h,\lambda 2\u2212na2\u2009sin2\psi )2+4nh,\lambda 2\kappa h,\lambda 2$

Display Formula(7)$2v2=\u2212(nh,\lambda 2\u2212\kappa h,\lambda 2\u2212na2\u2009sin2\psi )+(nh,\lambda 2\u2212\kappa h,\lambda 2\u2212na2\u2009sin2\psi )2+4nh,\lambda 2\kappa h,\lambda 2$