ARRANGEMENT AND METHOD FOR COMPENSATING FOR THE TEMPERATURE DEPENDENCE OF A FACET LENS FOR DETERMINING THE TOPOGRAPHY OF AN EYE

摘要

The present invention relates to a solution for compensating for the temperature dependence of a facet lens which is used to determine the topography of an eye. The present solution consists of an illumination unit, a facet lens, an image recording unit, optical elements for separating illumination beam path and detection beam path, and a control and evaluation unit. According to the invention, temperature sensors for determining the temperature of the facet lens are additionally present. Moreover, the temperature dependences of the emission angles of the beams are stored in the control and evaluation unit; these are taken into account, in addition to the temperature of the facet lens transmitted by the temperature sensors, by the control and evaluation unit when evaluating the recordings of the image recording unit. The proposed solution is envisaged, in particular, for facet lenses used to determine the topography of an eye. However, in principle, the proposed solution can be used wherever a present temperature dependence should be compensated for, in particular of optical components.