Mirror holders made of glass ceramics for concave, convex, and plane optical mirrors; translucent optical components made of glass ceramics for the testing of astronomical mirror holders, namely, mandrel material for the shaping of mirror shells in x-ray telescopes and mirror substrates of earthbound and orbital telescopes; high-precision mechanical components made of glass ceramics with low expansion for laboratory apparatus for the exact dimensioning of laboratory constructions, namely, for...

LENSES, PRISMS; GAUGE BLOCKS, MIRROR BLANKS AND TUBES AND HEATABLE REACTION VESSELS FOR CHEMICAL TECHNOLOGY