OPTICAL GLASS WITH VARYING REFRACTIVE INDEX

摘要

PCT No. PCT/DE96/00068 Sec. 371 Date Oct. 28, 1997 Sec. 102(e) Date Oct. 28, 1997 PCT Filed Jan. 18, 1996 PCT Pub. No. WO96/22254 PCT Pub. Date Jul. 25, 1996Optical glasses or lenses are described having a refractive index that varies as a function of at least one coordinate, which is made from a starting material with a constant refractive index by ion exchange. Greater index gradients than with the prior art are achieved by special compositions and ion exchange baths intended therefor. In addition, the stability of the glasses is increased.