Abstract: The sensitive, active surface of a wire-grid polarizer is protected from degradation by ambient environments by incorporating the component in a non-reactive atmosphere maintained by a sealed enclosure. The enclosure may provide a unitary mounting system for the polarizer, a liquid crystal light modulation panel and a projection lens to form a last-stage sub-assembly for a projection display system.

Abstract: A process for producing a catalyst structure comprised of nickel, chromium and copper and having a stratified surface material formed as a coherent layer on a substrate, said substrate being a nickel- and chromium-containing alloy, comprising: providing a copper-containing coating on the substrate, said substrate containing at least about 10 weight percent chromium; and heating said coated substrate in a protective atmosphere to a temperature of at least the melting point of copper to form a surface area material which is or is capable of being developed into a stratified surface material and a chromium-rich sublayer.