A Proposition for New Quality 3D Indexes to Measure Surface Roughness

摘要

The average absolute roughness S a presented in ISO 25178, commonly used in the industry, is not a reliable discriminator of different surface texture types. This paper presents new quality indexes for a 3D characterization of surface texture of diamond cut die inserts used for injected plastic optics in lighting applications. The proposed surface quality indexes, namely floor and ceiling surface quality index ( FSQI, CSQI ) were tested on nineteen different die insert samples. The results of the analysis demonstrate that FSQI and CSQI provide a better understanding and improved discriminator of the texture of different high precision diamond cutting processes than S a .