opd_manual¶

pyoof.telgeometry.opd_manual(Fp, F)[source]¶

Optical path difference (OPD) function, \(\delta(x, yd_z)\). Given by geometry of the telescope and defocus parameter, \(d_z\). For Cassegrain/Gregorian geometries. Primary and total (or effective) foci are required, \(F_\mathrm{p}\) and \(F_\mathrm{eff}\), respectively.

Parameters

FpQuantity: Focus primary reflector, \(F_\mathrm{p}\), in length units.
FQuantity: Effective or total focus for the telescope mirror configuration, \(F_\mathrm{eff}\), in length units.

Returns

opd_funcfunction: It returns the function opd_func(x, y, d_z), which depends only on the grid and radial offset values, similar to opd_effelsberg.