Non-destructive characterisation of AR coatings on curved surfaces
23.11.2010 - Photonik international 1/2010 | [ deutsche Version lesen ]
Highly efficient anti-reflective coatings minimize disruptive reflection losses for optical components, such as precision optical lenses or ophthalmic lenses. Surface measurements for coatings, which are taken in quality assurance steps by means of scanning spectral photometers, are either destructive or else they cannot be taken at any user-defined spot on a curved surface. Now a novel design in surface measuring heads, in conjunction with a diode array spectrometer, offers a versatile non-destructive remedy.
Authors: Lothar Völker, Michael Schulz-Grosser, Jos. Schneider Optische Werke GmbH, Bad Kreuznach, Germany Rüdiger Kubitzek, AudioDev GmbH, Heinsberg, Germany