Stratification¶

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This section is used to define a stratified media at the output plane of the imaging system. The situation is as depicted in Figure “Stratified media”. The $z-$ direction coincides with the optical axis when the output plane is not tilt (as set by the parameter Rotation).

Stratified media¶

The medium is stratified in the $z-$ direction, that is, the refractive index $n(z)$ is a piece-wise constant of function of $z$ ,

$\begin{eqnarray*} n(z) = n_l, \; \mbox{for}\; z_{l} \leq z \leq z_{l+1}, \end{eqnarray*}$

where $z_l$ is the position of the $l\mbox{th}$ interface. $d_l=z_{l+1}-z_{l}$ denotes the thickness of the $l\mbox{th}$ layer. The medium below the output plane ( $z<0$ ) has the refractive index $n_{\mathrm{img}}$ of the optical system’s image space as specified by the parameter ../../OpticalSystem/OutputRefractiveIndex. The multilayer stack is followed by an infinite thick medium of refractive index $n_\mathrm{b}$ .