Wen-Tse HSIAO^1*, Shih-Feng TSENG¹, Chien-Kai CHUNG¹, Pin-Hung CHEN², and Ming-Fei CHEN²

¹Instrument Technology Research Center, National Applied Research Laboratories, Hsinchu 30076, Taiwan
²Department of Mechatronics Engineering, National Changhua University of Education, Changhua 50058, Taiwan

(Received August 14, 2012; Revised December 25, 2012; Accepted December 27, 2012)

This study presents a portable laser machining system that consists of a fiber-optic diode laser source with a wavelength of 808 nm, optic/opto-mechanical components, a laser scanning module, and a laser energy control module. The laser beam quality was measured at different operation frequencies during system evaluation. The experimental results of beam profile evaluation indicate that the enlarged collimated beam was the TEM₀₀ mode with a roundness of approximately of 96%. The output laser power level increased as the pulse frequency increased during laser power evaluation. To control the rotating angle of the galvanometric scanning system, the deflective angle was adjusted using a 0.192 voltage to obtain a deflective value of 1 mm and the maximum scan field of 100× 100 mm². The laser source operated at different frequencies, with pulse widths ranging from 530 to 48 μs. Finally, the proposed machine can also be used for black thick paper laser writing applications.

Key words: portable laser machining system, opto-mechanical system, scanning control module, multi-function, marking, texturing

^*E-mail address: wentse@itrc.narl.org.tw