The Potassium Dihydrogen Phosphate(KDP) crystal is used as key non-linear optical material in Inertial Confinement Fusion(ICF). Traditional photoprocessing methods such as grinding and polishing are not suitable and Single Point Diamond Fly Cutting is adopted because of its special physicochemical characteristics. A method of observing KDP chips to study cutting mechanics has been presented in this paper. The KDP crystal was processed by a mono diamond tool with arc-nose, and plastic deformation can be found in the inside chip by optical microscope, also apparent transition of brittle fracture to plastic deformation can be found along the width direction of chips. By this method, chips in different cutting parameters were compared to study the relationship between critical thickness of ductile removal and cutting parameters like cutting depth and feedrate. Cutting experiments along different direction on different crystal planes were operated to research anisotropic characteristic of KDP crystal.

Date Published: 6 October 2010
PDF: 6 pages
Proc. SPIE 7655, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 76551W (6 October 2010); doi: 10.1117/12.867229

Published in SPIE Proceedings Vol. 7655:
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Li Yang; Yoshiharu Namba; David D. Walker; Shengyi Li, Editor(s)