The mirror system of the HERA-B RICH consists of two spherical and two planar mirrors, composed of altogether 116 mirror segments. Analysis of displacements of the \v{C}erenkov ring center relative to the charged particle track, for given spherical-planar segment pairs, leads to accurate information regarding the orientation of individual mirror segments. The method is described and the effect of applying the required corrections on the \v{C}erenkov angle resolution of the HERA-B RICH is discussed.
@article{arxiv.0710.0747,
title = {Calibration of the mirror system in the HERA-B RICH},
author = {Marko Starič and Peter Križan},
journal= {arXiv preprint arXiv:0710.0747},
year = {2008}
}