finesse.knm.maps.Map.get_linear_terms

Map.get_linear_terms(self, double spot_size: float)

Returns the spot weighted x and y linear terms from the OPD map data. For a surface z this is:

\[z(x,y) = a x + b y \]

Parameters:

spot_sizefloat

Spot size to use for weighting during curvature removal

Returns:

a, b(float, float)

Linear terms in x and y