finesse.thermal.hello_vinet.substrate_thermal_expansion_depth

finesse.thermal.hello_vinet.substrate_thermal_expansion_depth(data, z, h)

Computes the depth displacements throughout the bulk of an optic due to coating absorption. Displacement is in units of m per absorbed Watts for a custom axisymmetric heating beam, see get_p_n_s_numerical().

Parameters:

datatuple

Irradiance fit data from get_p_n_s_numerical()

zndarray

Longitudinal points, should sample points between -h/2 and h/2. Sampling outside this region will yield incorrect results.

hfloat

mirror thickness

Returns:

U_z_coat_per_Wndarray(shape=(z.size, r.size))

D Array of z displacements throughout the substrate per absorbed Watts of HG00 beam in coating

Notes

Solving equation 3.117 and 3.118 in [29]

Currently only works for n_max == 0.