Removed optika.surfaces.AbstractSurface.is_spectral_stop since it w…

…as too difficult to figure out.

optika/_tests/test_surfaces.py

@@ -53,9 +53,6 @@ def test_is_field_stop(self, a: optika.surfaces.AbstractSurface):
     def test_is_aperture_stop(self, a: optika.surfaces.AbstractSurface):
         assert isinstance(a.is_aperture_stop, bool)
 
-    def test_is_spectral_stop(self, a: optika.surfaces.AbstractSurface):
-        assert isinstance(a.is_spectral_stop, bool)
-
     def test_is_stop(self, a: optika.surfaces.AbstractSurface):
         assert isinstance(a.is_stop, bool)
 

optika/surfaces.py

@@ -106,20 +106,12 @@ def is_aperture_stop(self) -> bool:
         for the system
         """
 
-    @property
-    @abc.abstractmethod
-    def is_spectral_stop(self) -> bool:
-        """
-        flag controlling whether this surface should act as the surface
-        determining the wavelength range of the system
-        """
-
     @property
     def is_stop(self) -> bool:
         """
-        If this surface is any type of stop, field/pupil/spectal, return :obj:`True`.
+        If this surface is pupil stop or the field stop, return :obj:`True`.
         """
-        return self.is_field_stop or self.is_aperture_stop or self.is_spectral_stop
+        return self.is_field_stop or self.is_aperture_stop
 
     def propagate_rays(
         self,