Abstract: An optical fluorophosphate glass with an anomalous positive incremental dispersion +.DELTA..nu..sub.e between 11.8 and 12.5, a refractive index n.sub.e between 1.53 and 1.55 and an Abbe coefficient .nu..sub.e between 72.8 and 73.5 has the following atomic composition (in atom %): Mg: 2.0-3.5, Ca: 2.5-4.5, Sr: 13.0-16.0, Ba: 22.0-25.0, Al: 4.5-6.0, K: 0.1-0.3, P: 9.0-12.0, O: 17.0-20.0 and F: 20.0-23.0, the F/P ratio lying between 1.8 and 2.4 and the sum of the alkaline earths between 39.5 and 49. The new glasses are melted from a material having the following initial composition (in wt. %): Ca(PO.sub.3).sub.2 : 1.0-2.5, Ba(PO.sub.3).sub.2 : 23.0-25.5, Al(PO.sub.3).sub.3 : 12.0-14.5, MgF.sub.2 : 6.5-8.5, CaF.sub.2 : 5.5-8.0, SrF.sub.2 : 16.0-19.0, AlF.sub.3 : 10.0-12.5, SrO: 2.0-3.0, BaO: 12.5-14.5 and K.sub.2 TiF.sub.6 : 0.2-0.7, the alkaline earth fluorides content lying between 28.0 and 35.5 and the total content of all fluorides used between 38.2 and 48.7.