Product Code: ICAL09_1809

Microlens Fabrication with Fiber Laser Induced Thermo-Mechanical Plastic Forming Method
Authors:
Tao Chen, Institute of Laser EngineeringBeijing University of Technology; Beijing Peoples Republic of China
Tong Wang, Institute of Laser Engineering, Beijing University of Technology; Beijing Peoples Republic of China
Ji-Min Chen, Institute of Laser EngineeringBeijing University of Technology; Beijing Peoples Republic of China
Tie-Chuan Zuo, Institute of Laser EngineeringBeijing University of Technology; Beijing Peoples Republic of China
Shi-Bing Liu, Institute of Laser Engineering,Beijing University of Technology; Beijing Peoples Republic of China
Presented at ICALEO 2009

Optical fibre laser and its application research becomes one of research focuses in recent years, for its specific high beam quality characteristics. This paper reported a new fabrication method of refractive microlens with fiber laser. The mechanism of obtained microlens spherical surface on PMMA material is based on the laser-induced local thermal plastics deformation. The experiment setup is constructed, involving a fibre laser, a focus lens, a workpiece bearing stage, a monitoring microscope. We directly make the fiber laser irradiating on the transparent polymer plate, while controlling the defocusing distant, laser power, and exposing timesucceeded in producing microlens with diameter and surface curvature size in several thousand micrometers to millimeters. We performed the orthotropic test and made its variance analysis. By doping with the experimental datum, the main influence factors of obtained refractive micro lens were match up with curve fitting. The research results show that the fibre laser output power has the extinct effect on the produced microlens prarameters, whereas the irradiating time has subordinate affection and the defocusing distant hasnt obvious action. The relationship formulae between the optical fiber laser processing parameters and lens parameters are acquired.