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Proceedings Paper

Freeform manufacturing of a progressive addition lens by use of a voice coil fast tool servo
Author(s): Yi Yu Li; Jiao Jie Chen; Hai Hua Feng; Chaohong Li; Jia Qu; Hao Chen
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Paper Abstract

The back surface of progressive addition lens (PAL) is a non-rotationally symmetric freeform surface. The local radius varies progressively from the far zone to the near zone along the intermediate zone to give the addition power. Numerical simulation method is performed to calculate the discrete points on the freeform surface in polar coordinate and generate the data files containing the trajectory of diamond tool tip for surface machining. The fabrication of PAL is accomplished by using self-developed single-point diamond turning machine with voice coil fast tool servo. The polished freeform surface profile measured by a 3-axes coordinate measuring machine shows little deviation to the simulation result. Surface power and cylinder of the fabricated PAL is also measured for comparison with theoretical design.

Paper Details

Date Published: 6 August 2014
PDF: 5 pages
Proc. SPIE 9281, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 92810Q (6 August 2014); doi: 10.1117/12.2067786
Show Author Affiliations
Yi Yu Li, Wenzhou Medical Univ. (China)
Jiao Jie Chen, Wenzhou Medical Univ. (China)
Hai Hua Feng, Wenzhou Medical Univ. (China)
Chaohong Li, Wenzhou Medical Univ. (China)
Jia Qu, Wenzhou Medical Univ. (China)
Hao Chen, Wenzhou Medical Univ. (China)


Published in SPIE Proceedings Vol. 9281:
7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Li Yang; Eric Ruch; Shengyi Li, Editor(s)

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