diff --git a/Device/Pol/PolFilter.cpp b/Device/Pol/PolFilter.cpp
index 514b651951b680ea12d5a8f8e0b0fbd2c8f27976..1cd7e374707f40a42db710f6564d1939935985c8 100644
--- a/Device/Pol/PolFilter.cpp
+++ b/Device/Pol/PolFilter.cpp
@@ -16,21 +16,21 @@
 #include "Base/Spin/SpinMatrix.h"
 #include "Base/Util/Assert.h"
 
-PolFilter::PolFilter(R3 direction, double efficiency, double total_transmission)
+PolFilter::PolFilter(R3 direction, double efficiency, double transmission)
 {
-    ASSERT(total_transmission == 0.5);
-    double aplus = total_transmission * (1.0 + efficiency);
-    double amin = total_transmission * (1.0 - efficiency);
+    ASSERT(transmission == 0.5);
+    double aplus = transmission * (1.0 + efficiency);
+    double amin = transmission * (1.0 - efficiency);
     if (aplus < 0.0 || aplus > 1.0 || amin < 0.0 || amin > 1.0)
         throw std::runtime_error("Invalid efficiency and transmission for polarization analyzer");
-    if (efficiency == 0.0 || total_transmission == 0.0 || direction.mag() == 0.0) {
+    if (efficiency == 0.0 || transmission == 0.0 || direction.mag() == 0.0) {
         m_direction = {};
         m_efficiency = 0;
-        m_total_transmission = total_transmission;
+        m_transmission = transmission;
     } else {
         m_direction = direction.unit_or_throw();
         m_efficiency = efficiency;
-        m_total_transmission = total_transmission;
+        m_transmission = transmission;
     }
 }
 
@@ -42,9 +42,9 @@ PolFilter::PolFilter()
 SpinMatrix PolFilter::matrix() const
 {
     if (m_direction.mag() == 0.0 || m_efficiency == 0.0)
-        return m_total_transmission * SpinMatrix::One();
+        return m_transmission * SpinMatrix::One();
     R3 v = m_direction.unit_or_throw() * m_efficiency;
-    return 2 * m_total_transmission * SpinMatrix::FromBlochVector(v);
+    return 2 * m_transmission * SpinMatrix::FromBlochVector(v);
 }
 
 R3 PolFilter::analyzerDirection() const
@@ -57,7 +57,7 @@ double PolFilter::analyzerEfficiency() const
     return m_efficiency;
 }
 
-double PolFilter::totalTransmission() const
+double PolFilter::transmission() const
 {
-    return m_total_transmission;
+    return m_transmission;
 }
diff --git a/Device/Pol/PolFilter.h b/Device/Pol/PolFilter.h
index 536549f251e39ff25add751f7f39a55816611122..3570c04b19176e625d9cab067ecd3d23f5d90db3 100644
--- a/Device/Pol/PolFilter.h
+++ b/Device/Pol/PolFilter.h
@@ -24,7 +24,7 @@ class SpinMatrix;
 
 class PolFilter : public INode {
 public:
-    PolFilter(R3 direction, double efficiency, double total_transmission);
+    PolFilter(R3 direction, double efficiency, double transmission);
     PolFilter();
     ~PolFilter() override = default;
 
@@ -40,12 +40,12 @@ public:
     //! Retrieve the analyzer characteristics
     R3 analyzerDirection() const;
     double analyzerEfficiency() const; //!< will always return positive value
-    double totalTransmission() const;
+    double transmission() const;
 
 private:
-    R3 m_direction;              //!< direction of polarization analysis
-    double m_efficiency;         //!< efficiency of polarization analysis
-    double m_total_transmission; //!< total transmission of polarization analysis
+    R3 m_direction;        //!< direction of polarization analysis
+    double m_efficiency;   //!< efficiency of polarization analysis
+    double m_transmission; //!< transmission of unpolarized beam
 };
 
 #endif // BORNAGAIN_DEVICE_POL_POLFILTER_H
diff --git a/GUI/Model/FromCore/ItemizeSimulation.cpp b/GUI/Model/FromCore/ItemizeSimulation.cpp
index 990383c993377d9d7698ae68d95fcae9111359e2..9338a180a3391f664bd765ac4c36334cffa5a420 100644
--- a/GUI/Model/FromCore/ItemizeSimulation.cpp
+++ b/GUI/Model/FromCore/ItemizeSimulation.cpp
@@ -318,15 +318,15 @@ void setDetectorResolution(DetectorItem* detector_item, const IDetector& detecto
 
 void setPolarizer2(InstrumentItem* instrument_item, const PolFilter& analyzer)
 {
-    double total_transmission = analyzer.totalTransmission();
-    if (total_transmission <= 0.0)
+    double transmission = analyzer.transmission();
+    if (transmission <= 0.0)
         return;
 
     R3 analyzer_dir = analyzer.analyzerDirection();
     double efficiency = analyzer.analyzerEfficiency();
     instrument_item->setAnalyzerDirection(analyzer_dir);
     instrument_item->setAnalyzerEfficiency(efficiency);
-    instrument_item->setAnalyzerTotalTransmission(total_transmission);
+    instrument_item->setAnalyzerTotalTransmission(transmission);
 }
 
 void updateDetector(GISASInstrumentItem* instrument_item, const IDetector& detector)
diff --git a/Sim/Export/SimulationToPython.cpp b/Sim/Export/SimulationToPython.cpp
index 177701912d09dc4431b97f8eb00d53c4748d2079..db2c0102ca93e07fe63c47363da2da6be66f4bdc 100644
--- a/Sim/Export/SimulationToPython.cpp
+++ b/Sim/Export/SimulationToPython.cpp
@@ -123,7 +123,7 @@ std::string definePolarizationAnalyzer(const PolFilter& analyzer, const std::str
     std::ostringstream result;
     R3 analyzer_direction = analyzer.analyzerDirection();
     double analyzer_efficiency = analyzer.analyzerEfficiency();
-    double analyzer_total_transmission = analyzer.totalTransmission();
+    double analyzer_transmission = analyzer.transmission();
 
     if (analyzer_direction.mag() > 0.0) {
         std::string direction_name = "analyzer_direction";
@@ -133,7 +133,7 @@ std::string definePolarizationAnalyzer(const PolFilter& analyzer, const std::str
                << Py::Fmt::printDouble(analyzer_direction.z()) << ")\n";
         result << indent() << parent << ".setAnalyzer(" << direction_name << ", "
                << Py::Fmt::printDouble(analyzer_efficiency) << ", "
-               << Py::Fmt::printDouble(analyzer_total_transmission) << ")\n";
+               << Py::Fmt::printDouble(analyzer_transmission) << ")\n";
     }
     return result.str();
 }