Testing aspheric surfaces with CGH of different accuracy in industrial manufacturing environs

摘要

Testing aspheric surfaces by interferometer set-up together with a "NULL-Computer Generated Hologram (NULL-CGH)" is a well-established method. Nevertheless, this method is used in industrial manufacturing environs only frequently yet due to certification issues, cost dependence on laboratory-intensive equipment and highly specialised skills that are required to perform Null-tests for aspheric surfaces. On the other hand there is no widely accepted alternate method to feedback the aspheric test surfaces's shap error to the workmanship during fabrication of aspherics. This paper deals with results obtained by testing aspheric surfaces in industrial manufacturing environs with CGH of different production accuracy.