Phase difference

$\Delta ={\Delta }_{\text{TM}}-{\Delta }_{\text{TE}}$

Effective transmittance

$t_{\text{rms}}=\text{sqrt}\left(t_{\text{TM}}^2+t_{\text{TE}}^2\right)$

Ratio of transmittance

$\tan \Psi =t_{\text{TE}}/t_{\text{TM}}$