Sub-wavefront birefringent phase measurement of anodised aluminium surface coatings

Abstract

There are many research areas where the birefringent properties of materials can be used to provide relevant measurements. In this paper 2 examples are presented which describe how a high resolution phase-encoded intensity distribution of birefringence may be used to non-intrusively derive the stress experienced by use of an anodised aluminium riveting process and a gas turbine compressor blade under impact loading.