We present first results on the performance of a new generation of semitransparent amorphous silicon position detectors having good properties such as an intrinsic position resolution better than 5 mu m, an spatial point reconstruction precision better than 10 mu m, deflection angles smaller than 10 mu rad and transmission in the visible and NIR higher than 70%. In addition the sensitive area is very large: 30 x 30 mm(2).