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SCATMECH > Classes and Functions >
Surface Scattering Models
> Two_Face_BRDF_Model
class
Two_Face_BRDF_Model
The class Two_Face_BRDF_Model implements
the solution to first-order vector perturbation theory for
roughness in the smooth surface limit of a single interface
of a single dielectric film as described by Elson. It
inherits the properties of Roughness_BRDF_Model. The code is a
less general form of Roughness_Stack_BRDF_Model, which
handles the scattering from a single interface with any
number of dielectric layers.
Parameters:
| Parameter |
Data
Type |
Description |
Default |
| lambda |
double |
Wavelength of the light
in vacuum [µm].
(Inherited from BRDF_Model). |
0.532 |
| type |
int |
Indicates
whether scattering is evaluated in reflection (0) or
transmission (1).
(Inherited from BRDF_Model). |
0 |
| substrate |
dielectric_function |
The
optical constants of the substrate, expressed as a
complex number (n,k) or, optionally, as a function of
wavelength.
(Inherited from BRDF_Model). |
(4.05,0.05) |
| psd |
PSD_Function_Ptr |
The
two-dimensional power spectrum of the surface height
function [µm4].
(Inherited from Roughness_BRDF_Model). |
ABC_PSD_Function |
| film |
dielectric_function |
The
optical constants of the film, expressed as a complex
number (n,k) or, optionally, as a function of
wavelength. |
(1.46,0) |
| thickness |
double |
The
thickness of the film [µm]. |
0.05 |
| layer |
int |
Index of
the rough interface, where (1) represents the buried
interface, and (2) represents the exposed interface.
This model assumes that the other interface is not
rough. |
1 |
See also:
SCATMECH Home, Conventions, BRDF_Model, Roughness_BRDF_Model, Correlated_Roughness_BRDF_Model,
Roughness_Stack_BRDF_Model
J. M. Elson, "Multilayer-coated optics: guided-wave
coupling and scattering by means of interface random
roughness," J. Opt. Soc. Am. A 12(4), 729
(1995).
T. A. Germer, "Polarized light scattering by
microroughness and small defects in dielectric layers," J.
Opt. Soc. Am. A 18(6), 1279-1288
(2001).
Include file:
#include "twoface.h"
Source code:
twoface.cpp
Definition of public elements:
class Two_Face_BRDF_Model
: public Roughness_BRDF_Model
{
};
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Current SCATMECH version: 6.00 (February 2008)
This page first online: Version 2.00 (March 2001)
This page last modified: Version 6.00 (February 2008)
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