@inproceedings{ba081518d6d741d4849aa5368eb2fe06,
title = "Slow tool servo diamond turning of optical freeform surface for astigmatic contact lens",
abstract = "Three ultra-precision machining processes namely fast tool servo, slow tool servo and diamond milling, are frequently used to produce optical freeform surface. Slow tool servo machining has the advantages of no extra attachment and fast setting-up, however the three dimensional tool shape compensation and tool-path generation must be conducted carefully for getting high form accuracy and fine surface finish. This research aimed to develop a model of three dimensional tool shape compensation for generating 3D tool path in slow tool servo diamond turning of asymmetrically toric surface for astigmatic contact lens. The form accuracy of freeform surface was measured by ultra-high accuracy 3D profilometer (UA3P) with user define function. After correction, the form error is less than 0.5μm both in X- and Y-direction and the surface roughness is less than 5nm.",
keywords = "Astigmatic contact lens, Optical freeform surface, Slow tool servo diamond turning",
author = "Chen, {Chun Chieh} and Cheng, {Yuan Chieh} and Hsu, {Wei Yao} and Chou, {Hsiao Yu} and Wang, {Pei Jen} and Tsai, {Din Ping}",
year = "2011",
month = aug,
doi = "10.1117/12.892447",
language = "English",
isbn = "9780819487360",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Optical Manufacturing and Testing IX",
note = "Optical Manufacturing and Testing IX ; Conference date: 22-08-2011 Through 24-08-2011",
}