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SCATMECH > List of Classes and Functions >
Surface Scattering Models
> Roughness_BRDF_Model
Abstract class Roughness_BRDF_Model
The abstract class Roughness_BRDF_Model handles the
generic operations associated with a BRDF scattering model
associated with roughness in the smooth surface limit. In
particular, it supplies a power spectrum for its inherited
classes.
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 the light is incident from above the
substrate or from within the substrate and whether the
scattering is evaluated in reflection or transmission.
The choices are:
0 : Light is incident from the above the substrate, and scattering is evaluated in reflection.
1 : Light is incident from the above the substrate, and scattering is evaluated in transmission.
2 : Light is incident from the within the substrate, and scattering is evaluated in reflection.
3 : Light is incident from the within the substrate, and scattering is evaluated in transmission.
For 1, 2, and 3, the substrate must be non-absorbing.
Not all modes are supported for all models inheriting BRDF_Model.
(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]. |
ABC_PSD_Function |
See also:
SCATMECH Home,
Conventions,
BRDF_Model,
Microroughness_BRDF_Model,
Correlated_Roughness_BRDF_Model,
Two_Face_BRDF_Model,
Roughness_Stack_BRDF_Model,
Correlated_Roughness_Stack_BRDF_Model,
Uncorrelated_Roughness_Stack_BRDF_Model,
Growth_Roughness_Stack_BRDF_Model,
PSD_Function,
Facet_BRDF_Model
J. C. Stover, Optical Scattering: Measurement and
Analysis, (SPIE Optical Engineering Press, Bellingham,
WA, 1995).
Include file:
#include "rough.h"
Source code:
rough.cpp
reg_rough.cpp
Definition of public elements:
class Roughness_BRDF_Model : public BRDF_Model
{
double Bragg_Frequency(double thetai, double thetas, double phis);
};
typedef Model_Ptr<Roughness_BRDF_Model> Roughness_BRDF_Model_Ptr;
This function
returns the spatial frequency associated with incident
angle thetai, scattering polar angle
thetas, and scattering azimuthal angle
phis. It is primarily used internally by inherited
classes.
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Current SCATMECH version: 7.22 (April 2021)
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