absorption2Od

absorption2Od(absorp)

Convert absorption signal to optical depth (OD).

Parameters:

absorp (double) – Absorption ratio \(I_\mathrm{atom}/I_\mathrm{light}\) (or equivalent)

Returns:

Optical depth \(\mathrm{OD} = -\ln(\lvert a \rvert + \epsilon)\) clipped to finite, real values

Return type:

double

\[\mathrm{OD} = -\ln\!\big( |a| + \epsilon \big)\]