Abstract
High precision optical metrology may be viewed from the perspective of the relevant object properties for optical measurement such as microstructure, surface gradient and geometrical complexity. We discuss high precision measurement methods and compare their suitability with respect to these object properties. We emphasize reflectometry and shearography as examples of two interesting techniques particularly suited for high precision optical metrology and extend the discussion to optical non destructive testing (NDT). In this context, reflectometry and shearography appear to be interesting techniques suitable for both optical metrology and NDT. We finally discuss the unique features of laser ultrasonic for NDT.
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