Studying parameters and quality of thread by optical light field recorder

Abstract

The work suggests a method to inspect the profile and micro-relief of thread surface using a light-field optoelectronic system based on a digital camera with a collection of microlenses. The authors have developed an optical scheme to record 3D images of the profile and micro-relief of the controlled thread surface. The system involves computer technologies of National Instruments Company (NI, USA) to elaborate the algorithms for determination of thread profile geometry and micro-relief parameters. The results demonstrate that the implementation of the algorithms of morphological image layer analysis derived from the light field file specifying the depth of field allows increasing multiple times the accuracy of thread profile determination using the profile height. The article was prepared according to the State task (the project’s number No 9.10520.2018/11.12)