IC 009. US 021 023 026 036 038. G & S: 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 use in laboratory measuring instruments; high-precision mechanical components made of glass ceramics with low expansion for the exact dimensioning of lithographical apparatus for use in lithography and micro-lithography, namely, movable mechanical parts in silicon wafer stepper and scanner machines for wafer positioning, and substrate material for reflective optics in EUV lithography; high-precision mechanical components made of glass ceramics with low expansion for the exact dimensioning of laser apparatus for use in laser technology, high-precision opto-mechanical components made of glass ceramics with low expansion used in opto-mechanical technology in the field of space exploration, high-precision components made of glass ceramics with low expansion for measurement technology, namely, gyroscopes and carriers for length scales
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