GrismEpsGrismEps - The angle between the normal and the dispersion plane

Description:
This attribute holds the angle (in radians) between the normal to the grating or exit prism face, and the dispersion plane. The dispersion plane is the plane spanned by the incoming and outgoing ray. The default value is 0.0.
Type:
Double precision.
Class Applicability:
GrismMapGrismMap
All GrismMaps have this attribute.