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Fabrication of Large-area Micro-lens Arrays with Fast Tool Control
Young Jin Noh,Yoshikazu Arai,Makoto Tano,Wei Gao 한국정밀공학회 2008 International Journal of Precision Engineering and Vol.9 No.4
This paper describes a fast tool control (FTC)-based diamond turning process for fabricating large-area high-quality micro-lens arrays. The developed FTC unit has a stroke of 48 ㎛ and a resonance frequency of 4.9 kHz. Micro-lens arrays were fabricated using a micro-cutting tool with a nose radius of 50 ㎛. The FTC unit was integrated 'with a force sensor so that the initial position of the micro-cutting tool with respect 10 the workpiece surface could be detected through monitoring the contacting force. The length and depth of the designed parabolic micro-lens profile were 190 ㎛ and 20㎛, respectively. A micro-lens array was fabricated on a cylinder surface over an area of φ 55 ㎜ × 40 ㎜.
Fabrication of Large-area Micro-lens Arrays with Fast Tool Control
Noh, Young-Jin,Arai, Yoshikazu,Tano, Makoto,Gao, Wei Korean Society for Precision Engineering 2008 International Journal of Precision Engineering and Vol.9 No.4
This paper describes a fast tool control (FTC)-based diamond turning process for fabricating large-area high-quality micro-lens arrays. The developed FTC unit has a stroke of $48{\mu}m$ and a resonance frequency of 4.9 kHz. Micro-lens arrays were fabricated using a micro-cutting tool with a nose radius of $50{\mu}m$. The FTC unit was integrated with a force sensor so that the initial position of the micro-cutting tool with respect to the workpiece surface could be detected through monitoring the contacting force. The length and depth of the designed parabolic micro-lens profile were $190{\mu}m$ and $20{\mu}m$, respectively. A micro-lens array was fabricated on a cylinder surface over an area of ${\phi}55 mm{\times}40 mm$.