Diamond turning of mirrors and infrared optical components

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Abstract
The authors describe an experimental study of single-point diamond-machining techniques with a view to producing a low-cost production machine for the manufacture of infrared optical components such as aluminium mirrors, germanium lenses and zinc sulphide domes. These components may be machined to a high form accuracy and surface finish such that they require no subsequent polishing. Of the three possible machine configurations, X-Y, R- theta and spherical generation, the last two are considered the most efficient and cost effective for the present requirement. They have been extended to produce aspheric components with departures up to +or-2 mm from a best-fit sphere.

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