raytrace_to_det

anri.geom.raytrace_to_det(vec_lab, origin_lab, s_step_lab, f_step_lab, det_origin_lab)

Ray-trace from vector in lab frame (unknown length) to detector coordinates (sc, fc).

Adapted from ImageD11.transform.compute_xyz_from_tth_eta().

Parameters:

• vec_lab (Array) – [3] Outgoing scaled normalised wave-vector in lab frame

• origin_lab (Array) – [3] Origin of diffraction in lab frame

• s_step_lab (Array) – [3] Lab-frame step of one pixel along the slow direction, from detector_basis_vectors_lab().

• f_step_lab (Array) – [3] Lab-frame step of one pixel along the fast direction, from detector_basis_vectors_lab().

• det_origin_lab (Array) – [3] Lab-frame position of pixel (0, 0), from detector_basis_vectors_lab().

Returns:

• sc (jax.Array) – Slow coordinate on detector in pixels

• fc (jax.Array) – Fast coordinate on detector in pixels

See also

anri.geom.detector_basis_vectors_lab

Computes s_step_lab, f_step_lab and det_origin_lab.

Notes

Originally from section 5 of (Thomas, 1992) [3] .

References

[3]

Thomas, D.J., 1992. Modern equations of diffractometry. Diffraction geometry. Acta Crystallographica Section A 48, 134–158. https://doi.org/10.1107/S0108767391008577