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We report on a UV-oriented imaging survey in the fields of the old,metal-rich open clusters, NGC 6791, NGC 6819 and NGC 7142. These three clustersrepresent both very near and ideal stellar aggregates to match the distinctiveproperties of the evolved stellar populations, as in elliptical galaxies andbulges of spirals. The CMD of the three clusters is analyzed in detail, withspecial emphasis to the hot stellar component. We report, in this regard, onenew extreme horizontal-branch star candidate in NGC 6791. For NGC 6819 and7142, the stellar luminosity function points to a looser radial distribution offaint lower Main Sequence stars, either as a consequence of cluster dynamicalinteraction with the Galaxy or as an effect of an increasing fraction of binarystars toward the cluster core, as actually observed in NGC 6791 too.

UB CCD photometry of the old, metal rich, open clusters NGC 6791, NGC 6819 and NGC 7142