Chien-Yao HUANG^1*, Chun-Chieh CHEN¹, Hsiao-Yu CHOU¹, and Chang-Pin CHOU²

¹Instrument Technology Research Center, National Applied Research Laboratories, 20, R&D Rd. VI, Hsinchu Science Park, Hsinchu 300, Taiwan
²Department of Mechanical Engineering, National Chiao Tung University, 1001 University Road, Hsinchu 300, Taiwan

(Received July 13, 2012; Accepted November 16, 2012)

In this paper, we describe the fabrication of a Fresnel lens with a diameter of 15 mm by a glass molding technique. Tungsten carbide and K-CSK120 were used as the materials of the mold and lens, respectively. The optimal parameters determined for the molding process included a molding temperature of 560 °C, a molding force of 300 N, a temperature holding time of 180 s, and a cooling rate of 18.5 °C/min.

Key words: Fresnel lens, glass molding, diamond grinding, K-CSK120

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