SCATMECH > Classes and Functions > Surface Scattering Models > Correlated_Roughness_BRDF_Model

class Correlated_Roughness_BRDF_Model

The class Correlated_Roughness_BRDF_Model implements the solution to first-order vector perturbation, or Rayleigh-Rice, theory for conformal roughness of a dielectric film in the smooth surface limit. It inherits the properties of Roughness_BRDF_Model, which inherits the properties of BRDF_Model.

Diagram showing the components contributing to the effective BRDF of a sample surrounded by air.

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. (1.46,0.05)
thickness double The thickness of the film [µm]. 0.05

See also:

SCATMECH Home,   Conventions,   BRDF_Model,   Roughness_BRDF_Model

J. M. Elson, "Light scattering from surfaces with a single dielectric overlayer," J. Opt. Soc. Am. 66 (7) 682-694 (1976).

Include file:

#include "crough.h"

Source code:

crough.cpp

Definition of public elements:

class Correlated_Roughness_BRDF_Model
 : public Roughness_BRDF_Model
{
    public:
        Correlated_Roughness_BRDF_Model( int ask=0);

        void set_thickness( double t);
        double get_thickness();

        void set_film(const dielectric_function& e);
        dielectric_function get_film();

        virtual void AskUser();
        virtual void set_parameter(const string& name,const string& value);
        static Inheritance inheritance;
        virtual Model* clone() const;
};

void set_thickness( double t)
double get_thickness()

Functions to set and get the thickness of the film.

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void set_film(const dielectric_function& f)
dielectric_function get_film()

Functions to set and get the dielectric function of the layer.

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Correlated_Roughness_BRDF_Model( int ask=0)

The constructor for Correlated_Roughness_BRDF_Model. If ask=1, then the program asks the user for the layer thickness and optical constant.

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Current SCATMECH version: 6.00 (February 2008)
This page first online: Version 1.00 (March 2000)
This page last modified: Version 6.00 (February 2008)