2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/148081It is shown that single and double spin asymmetries in polarized diffractive $Q \bar Q$ production depend strongly on the spin structure of the quark-pomeron vertex. They can be studied in future spin experiments at HERA.7 pages, latex, 4 figures in one uuencode compressed PS file. Plenary talk at the International workshop Spin-95, Sept.18-23, Protvino, RussiaHigh Energy Physics - Phenomenologytext