Ultra-Precision Machining of Dies for Microlens Arrays Using a Diamond Cutting Tool
Patterning of numerous microlenses on a surface improves the optical performance of components such as liquid crystal displays. A cutting method using a diamond tool is examined to fabricate a molding die that employs arbitrary array patterns to mold millions of microlenses. The present paper investigates machining of microlenses on the order of 2 kHz, using a piezo-actuated micro cutting unit and a synchronous control system of the cutting unit with an NC controller. Experiments using this system revealed that it is possible to machine a large number of microlenses on a molding die with high precision.
Fan Rui, Qiao Lihong, Chen Huawei, Ochi Akio, Usuki Hiroshi and Sekiya Katsuhiko
T. Yoshikawa et al., "Ultra-Precision Machining of Dies for Microlens Arrays Using a Diamond Cutting Tool", Key Engineering Materials, Vols. 407-408, pp. 359-362, 2009