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Proceedings Paper

Residue stress analysis of molding aspherical plastic lens
Author(s): Ming-Ying Hsu; Yuan-Chieh Cheng; Shenq-Tsong Chang; Ting-Ming Huang
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Paper Abstract

The aspherical plastic lens is widely used in commercial optical products. Warpage and residue stress are two important factors that influence wavefront error. Several investigators have discussed warpage. We propose a methodology to study the effect of residue stress on wavefront error. Mold flow software was adopted to calculate the residue stress in injection processes. Optical software was used to find optical ray paths through the lens. Corresponding Optical Path Different (OPD) in each ray path was simulated by self-developed software. A 50-mm diameter plastic lens was used in this study. The mild- and high-frequency wavefront errors and the stress OPD effect at the injection area were found to be a result of the molding process. The proposed methodology was found to be very suitable for finding the effect of residue stress on wavefront error in plastic lenses.

Paper Details

Date Published: 2 September 2015
PDF: 8 pages
Proc. SPIE 9573, Optomechanical Engineering 2015, 95730P (2 September 2015); doi: 10.1117/12.2185267
Show Author Affiliations
Ming-Ying Hsu, Instrument Technology Research Ctr. (Taiwan)
Yuan-Chieh Cheng, Instrument Technology Research Ctr. (Taiwan)
Shenq-Tsong Chang, Instrument Technology Research Ctr. (Taiwan)
Ting-Ming Huang, Instrument Technology Research Ctr. (Taiwan)

Published in SPIE Proceedings Vol. 9573:
Optomechanical Engineering 2015
Alson E. Hatheway, Editor(s)

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