slmsuite.holography.toolbox.phase.zernike

zernike(grid, n, m, aperture=None)[source]

Returns a single real Zernike polynomial.

Parameters

  • grid ((array_like, array_like) OR SLM) – Meshgrids of normalized \(\frac{x}{\lambda}\) coordinates corresponding to SLM pixels, in (x_grid, y_grid) form. These are precalculated and stored in any SLM, so such a class can be passed instead of the grids directly.

  • n (int) – Cartesian Zernike index defining the polynomial.

  • m (int) – Cartesian Zernike index defining the polynomial.

  • aperture ({"circular", "elliptical", "cropped"} OR (float, float) OR None) – See zernike_sum().

Returns

The phase for this function.

Return type

numpy.ndarray