#ifndef __DRCOPTMATNLAK33A_H__
#define __DRCOPTMATNLAK33A_H__

/*! 
  \brief Class for optical material representation.

  In this case the glass N-LaK33A (Lanthanum crown) from Schott. See 
  http://www.schott.com/optics_devices/german/products/flash/abbediagramm_flash.html

*/

class DrcOptMatNLAK33A : public DrcOptMatAbs
{
 protected:

  //!                                   Sellmeier coefficient for refractive index.
  double  m_B1;                         
  //!                                   Sellmeier coefficient for refractive index.  
  double  m_B2;                         
  //!                                   Sellmeier coefficient for refractive index.
  double  m_B3;                         
  //!                                   Sellmeier coefficient for refractive index.
  double  m_C1;                         
  //!                                   Sellmeier coefficient for refractive index.  
  double  m_C2;                         
  //!                                   Sellmeier coefficient for refractive index.
  double  m_C3;                         
  //!                                   Random generator.
  mutable TRandom m_ran;                

 private:
  /*! \brief Auxiliary function for assignment operator and copy constructor..
    \param s The object to copy.
  */
  void copy(const DrcOptMatNLAK33A& s);         

 public:

  //!                                             Empty constructor.
  DrcOptMatNLAK33A();                

  /*! Copy constructor.
    /param Object to copy.
  */ 
  DrcOptMatNLAK33A(const DrcOptMatNLAK33A& mat);

  /*! Assignment operator.
    /param Object to assign.
  */ 
  DrcOptMatNLAK33A& operator=(const DrcOptMatNLAK33A& mat);

  // Implementation of pure virtual functions from base class.
  DrcOptMatNLAK33A* clone() const;
  double refIndex(const double lambda) const;
  double refIndexDeriv(const double lambda) const;
  bool   absorptionFlag(double lambda, double length) const;  

 
};
#endif