Recent needs for the production of both spherical and aspherical optical surfaces place demands on the manufacturing techniques of polishing and metrology. However, there are several commercial optical polishing processes that can perform very-deterministic material removal once an accurate surface error map has been produced; it is the provision of this surface error map that is often difficult and time consuming. Part safety is also demanded and a great risk usually occurs in transferring the optic between polishing and metrology stages.
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