Patent ID: 6392824
Filing Date: 2002-05-21
Classification: C03C,C23C,C25D

Abstract:
An assembly for connecting a lens made of CaF2 to a metal mount by soldering, comprising:a lens made of CaF2 having a connection region only on the periphery of said lens, a metal mount part soldered to said peripheral connection region, comprising: a solder connection having a layer structure comprising CaF2 lens material, comprising: an adhesive layer selected from the group consisting of chromium and aluminum, a diffusion barrier layer made of nickel following said adhesive layer, a first oxidation protective layer following said diffusion barrier layer, a second oxidation protective layer following said first oxidation protective layer, a solder layer of approximately 100 &mgr;m thickness following said second oxidation protective layer, selected from the group consisting of a tin alloy and an indium alloy, having a melting temperature below 200Â° C., a wetting auxiliary layer following said solder layer comprising nickel, said metal mount part comprising steel, with transitions between said layers.