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Material::Dielectric class reference
[Core module]

Declaration  

#include <Goptical/Material/Dielectric>

namespace Goptical {
namespace Material {
class Dielectric;
};
};

This class is a member of the Material namespace.

This abstract class contains pure virtuals.

Inheritance  

ref_base<Base>

 
 

 
 

Base

 
 

 
 

Solid

 
 

 
 

Dielectric

 
 

 
 
 
 
 
 
 
 

DispersionTable
Schott
SellmeierMod
Abbe
Sellmeier
Herzberger
Conrady

 
 

 
 

Mil

Description  

This class models optical properties of dielectric materials. Transmittance values are stored in an Data::Set object with Data::Cubic interpolation enabled.

Child class has to implement the get_measurement_index function which must return relative refractive index as measured in medium material set by set_measurement_medium function. Default measurement medium is std_air.

The relative refractive index together with the absolute refractive index of measurement medium are used to compute absolute refractive index of dielectric material at reference temperature. This is the value returned by the get_refractive_index function when no temperature model is in use.

Temperature coeffiecients can be defined to take current material temperature into account when computing absolute refractive index:

  • The set_temperature_dndt function enables use of refractive index temperature deviation factor.

  • The set_temperature_schott function enables Schott temperature model as described in Schott "TIE-19: Temperature Coefficient of the Refractive Index" technical information document. It uses the following formula:

    n_t = \frac{{n}^{2}-1.0}{2\times n} \times \Delta t<br /> \times \left( \frac{\Delta t\times E_1+E_0}{{\lambda}^{2}-{\lambda_{tk}}^{2}} +<br /> D_2\times {\Delta t}^{2}+D_1\times \Delta t+D_0 \right)

    with \Delta t = t - t_{ref} and \lambda the micrometer wavelength.

Members  

See also the full member list section for this class.

Inherited members  

  • 23 members inherited from Solid

Functions  

Members detail  

Dielectric()  

No documentation available

void clear_internal_transmittance()  

Clear all transmittance data. Returned transmittance value is always 1.0 when the data set is empty.

See also get_transmittance_dataset function.

void disable_temperature_coeff()  

Disable use of temperature coefficients

double get_abbe_vd() const  

Compute glass Abbe number from refractive index model. Use d spectral line. Wavelen is in nm

double get_abbe_ve() const  

Compute glass Abbe number from refractive index model. Use d spectral line. Wavelen is in nm

virtual double get_internal_transmittance(double wavelen, double thickness) const  

This virtual function overrides the get_internal_transmittance virtual function defined in the Base base abstract class.

Documentation inherited from base class:

Get material internal transmittance for thickness in mm. Subclasses _must_ provide this function or the get_extinction_coef() function.

double get_internal_transmittance(double wavelen) const  

This function shadows the get_internal_transmittance function defined in the Base base abstract class.

Documentation inherited from base class:

Get material internal transmittance for 1mm thickness.

virtual double get_measurement_index(double wavelen) const = 0;  

Get material relative refractive index in measurment medium at specified wavelen in nm.

double get_partial_dispersion(double wavelen1, double wavelen2) const  

Compute glass partial dispersion between two wavelen in nm

double get_principal_dispersion() const  

Compute glass principal dispersion.

virtual double get_refractive_index(double wavelen) const  

This virtual function implements the get_refractive_index pure function declared in the Base base abstract class.

Documentation inherited from base class:

Get material absolute refractive index at specified wavelen in nm.

Data::DiscreteSet & get_transmittance_dataset()  

Get internal tranmittance dataset object.

See also clear_internal_transmittance function.

virtual bool is_opaque() const  

This virtual function implements the is_opaque pure function declared in the Base base abstract class.

Documentation inherited from base class:

Return true if material must be considered opaque for ray tracing

virtual bool is_reflecting() const  

This virtual function implements the is_reflecting pure function declared in the Base base abstract class.

Documentation inherited from base class:

Return true if material may reflect most of the light and must be considered as a mirror when ignoring ray intensity computation during ray tracing.

void set_internal_transmittance(double wavelen, double thickness, double transmittance)  

Add transmittance data, wavelen in nm

void set_measurement_medium(const const_ref<Base> &medium)  

Set glass measurement medium material.

void set_temperature_dndt(double dndt)  

Set and enable dn/dt thermal coefficient.

void set_temperature_schott(double d0, double d1, double d2, double e0, double e1, double wl_tk)  

Set and enable Schott thermal coefficients. wl_tk in um.

void set_wavelen_range(double low, double high)  

Set wavelen validity range in nm

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