In FIG. 4, to illustrate this distribution of the picture elements 35, a regular grid is shown that comprises a plurality of first reference lines R1 extending rectilinearly along the first direction of extent E1 and a plurality of second reference lines R2 extending rectilinearly along the second direction of extent E2. Both the first reference lines R1 and the second reference lines R2 have a regular spacing d from one another. The regular spacing d of the first reference lines R1 from one another corresponds to a mean value of spacings which picture elements 35 adjacent to one another along the second direction of extent E2 have from one another, and the regular spacing d of the second reference lines R2 from one another corresponds to a mean value of spacings which picture elements 35 adjacent to one another along the first direction of extent E1 have from one another. Furthermore, the number of the first reference lines R1 corresponds to a number of picture elements 35 arranged behind one another along the second direction of extent E2. A number of the second reference lines R2 also corresponds to a number of picture elements 35 arranged behind one another along the first direction of extent E1. In this regard, the first reference lines R1 and the second reference lines R2 form a regular grid, wherein, in a conventional regular arrangement, the picture elements 35 could be arranged at the respective points of intersection of the first reference lines R1 and the second reference lines R2.