Ming-Fei CHEN, Yu-Sen HO^*, Chien-Kai CHUNG, Wei-Lun HUANG, and Shen-Mao WANG¹

Department of Mechatronics Engineering, National Changhua University of Education, Bao-Shan Campus, No. 2, Shi-Da Road, Changhua 50007, Taiwan, R.O.C.
¹PCB Department, Tongtai Machine and Tool Co., Ltd., No. 3, Luke 3rd rd., Luzhu Shiang, Kaohsiung 82151, Taiwan, R.O.C.

(Received May 31, 2010; Accepted October 26, 2010)

The galvanometric scanning system is widely used in laser material processing and laser shows. The scanner is a broadband component, damped sufficiently to operate over a wide range of frequencies, from zero to a higher value related to its mechanical resonance. Developing a galvanometric scanner is an important issue in the design of optical systems. This study focuses on the development of the scanning system for a laser projector using red, green, and blue diode lasers. The performance of the laser projector, which consists of the scanning control system, color control system, and position detector, is also discussed.

Key words: laser projector, scanner, red–green–blue diode lasers, dots scanning, vector scanning, capacitive position detector

^*E-mail address: d96631003@mail.ncue.edu.tw