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Proceedings Paper

Study of ultra-precision diamond turning of a microlens array with a fast tool servo system
Author(s): S. To; T. C. Kwok; C. F. Cheung; W. B. Lee
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Paper Abstract

A Microlens array is a critical component for optimizing display functions. With the increasing usage of display systems in photonic products nowadays, more attention is being paid to the research and development of fabrication technology for microlens arrays. Ultra-precision machining with a fast tool servo (FTS) is one of the leading methodologies for fabrication of high-quality optical microstructural surfaces. FTS is an independently operated positioning device, which provides an indispensable solution for machining optical microstructures with sub-micrometer form accuracy and nanometric surface finish, without the need for any subsequent post processing. The surface quality of an FTS machined surface depends largely on the selection of cutting conditions. However, the achievement of ultra-precision surface finishing depends greatly on the experience and skill of the machine operators. Determination of optimal cutting conditions can stabilize the quality of the fabricated microlens array. In this paper, the effect of cutting conditions such as depth of cut, feed rate, spindle speed and surface speed are investigated; and optimal surface roughness and surface profiles in ultra-precision machining with FTS can be observed.

Paper Details

Date Published: 9 June 2006
PDF: 6 pages
Proc. SPIE 6149, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 61490S (9 June 2006); doi: 10.1117/12.674215
Show Author Affiliations
S. To, Hong Kong Polytechnic Univ. (Hong Kong China)
T. C. Kwok, Hong Kong Polytechnic Univ. (Hong Kong China)
C. F. Cheung, Hong Kong Polytechnic Univ. (Hong Kong China)
W. B. Lee, Hong Kong Polytechnic Univ. (Hong Kong China)


Published in SPIE Proceedings Vol. 6149:
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Li Yang; Shangming Wen; Yaolong Chen; Ernst-Bernhard Kley, Editor(s)

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