Patent ID: 7934390

Claim:
A method for manufacturing a lens of synthetic quartz glass with increased H 2 content for an optical system with an operating wavelength of less than 250 nm, comprising: (1) providing a precursor product of synthetic quartz glass with a first H 2 content of less than 2·10 15 molecules/cm 3 , with a circumferential border surface and two base surfaces on opposite sides, wherein at least one partial surface of at least one of said base surfaces has a curvature, (2) treating the precursor product in an H 2 -containing atmosphere in order to produce a precursor product of synthetic quartz glass with a second H 2 content that is increased in relation to the first H 2 content to more than 10 16 molecules/cm 3 , and measuring at least one optical property of said precursor product with said second H 2 and (3) simulating the H 2 diffusion and/or the formation of SiH inside the precursor product which occurs in the treatment under an H 2 -containing atmosphere and, based on said simulated diffusion and/or formation, determining a temperature and/or a pressure for the treatment of the precursor product in an H 2 -containing inert gas atmosphere.