Measurement of edge angles of knives using a light sectioningtechnique

摘要

A novel instrument for measuring edge angles of knives wasdeveloped. This instrument is capable of nondestructive and non-attachedmeasurement. A light-sectioning technique was used for the measurementwherein laser beam was divided into two parallel beams and which weremade planar by a cylindrical lens. These two beams illuminated theobject knife edge which was set aslant to the beam. Thus we can observetwo wedge-shaped lines when we observe a direction normal to it. We cancalculate the edge angle from the angle made by these lines and theinterval of lines. This instrument enables accurate and simplemeasurement of the edge angles of knives