This function uniformly adds an incremental refractive index to the background, which is assumed to be 1.0 (vacuum).
b f
Each line describes a separate function. There is no limit to the number of segments that can be entered.
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Uniform Fill This function uniformly adds an incremental refractive index to the background, which is assumed to be 1.0 (vacuum). b f |
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Linear Distribution This function linearly varies the incremental refractive index between two defined points. l x1 f1 x2 f2 x3 f3 .. Each point is described by the (distance, incremental index) pair. The the incremental index is added to the background index. Since there is no limit to the number of points that can be on a single descriptor, this method allows one to describe any complicated refractive index distribution. |
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Parabolic Distribution A parabolic refractive index distribution follows the equation 
The syntax is: p f xr xc |
 | If the value of f is negative, the resulting parabola will be concaved. |
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Gaussian Distribution A gaussian refractive index distribution follows the equation  The syntax can be summarized as: g f w xc |
| Distribution | Syntax |
| Uniform Fill | b f |
| Linear | l x1 f1 x2 f2 x3 f3 .. |
| Parabolic | p f xr xc |
| Gaussian | g f w xc |