Abstract
Details of a newly developed system for fracture surface contour measurement were described. A commercially available laser displacement meter based on the triangulation principle was used as a main hardware in the first system. Another laser displacement meter with higher resolution, which is based on the principle of critical angle, was utilized in the second system developed in the present study. An emphasis was put on the software development for widening a dynamic range of height measurement with keeping high resolution in both systems, in order to find a fracture surface zig-zag contour superposed on the long-range undulation. Finally, the successful use of the contour measurements by these systems was demonstrated for the topographical analysis of the fracture surfaces of ductile and brittle fracture samples.
