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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Device/Pol/PolFilter.cpp
//! @brief Implements class DetectionProperties.
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************************************
#include "Device/Pol/PolFilter.h"
#include "Base/Spin/SpinMatrix.h"
#include "Base/Util/Assert.h"
PolFilter::PolFilter(R3 Bloch_vector, double mean_transmission)
: m_vec_bloch(Bloch_vector)
, m_transmission(mean_transmission)
{
if (m_transmission < 0 || m_transmission > 0.5)
throw std::runtime_error("Invalid analyzer transmission");
if (m_vec_bloch.mag2() > 1)
throw std::runtime_error("Invalid analyzer Bloch vector");
}
SpinMatrix PolFilter::matrix() const
{
return 2 * m_transmission * SpinMatrix::FromBlochVector(m_vec_bloch);
}
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