Gradient 10
This surface has the same shape as the Standard surface, with media whose index of refraction is described by
where ya = |y| and the || symbols indicate the absolute value. This form of gradient has a discontinuity at the plane y = 0, and the gradient is bisymmetric about the y = 0 plane. If the glass type is left blank, then there is no dispersion. If a glass type is entered in the glass column, then it must be one of the Gradient 5 materials defined in the section on the Gradient 5 surface type. The above formula then defines the index profile at the reference wavelength for the material, and the index at other wavelengths is computed according to the dispersion model defined for the Gradient 5 surface. The linear transverse term, ny1, is ignored when performing paraxial ray tracing.
The maximum step size Δt determines the trade-off between ray tracing speed and accuracy. For details see " Discussion on maximum step size for GRIN surfaces ". Also see " Restrictions on surfaces following GRIN surfaces ".
PARAMETER DEFINITIONS FOR GRADIENT 10 SURFACES
| Parameter # | Definition |
| 1 | Δt |
| 2 | n0 |
| 3 | ny1 |
| 4 | ny2 |
| 5 | ny3 |
| 6 | ny4 |
| 7 | ny5 |
| 8 | ny6 |
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