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Proceedings Paper

Automatic optical inspection method for soft contact lenses
Author(s): Chun-Li Chang; Wen-Hong Wu; Chi-Chun Hwang
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Paper Abstract

In general, the manufacture of contact lenses is conventionally labor intensive, requiring manual handling and inspection of the cast lens during production. This paper is to build an AOI (automatic optical inspection) system, which include suitable light source, camera and image processing algorithms, for contact lenses defect inspection. The mainly defect type are missing lens and surface defect on the contact lenses. An illumination system with fixed focal lens and charge coupled device (CCD) is used to capture the images of contact lenses. After images are captured, an algorithm is employed to check if there are flaws showed on the images. Five kinds of defect can be detected by the designed algorithm. A prototype of the AOI system for contact lenses inspection is implemented. The experimental result shows that the proposed system is robust for in-line inspection.

Paper Details

Date Published: 17 July 2015
PDF: 6 pages
Proc. SPIE 9524, International Conference on Optical and Photonic Engineering (icOPEN 2015), 952402 (17 July 2015); doi: 10.1117/12.2182366
Show Author Affiliations
Chun-Li Chang, Instrument Technology Research Ctr. (Taiwan)
Wen-Hong Wu, Instrument Technology Research Ctr. (Taiwan)
Chi-Chun Hwang, Instrument Technology Research Ctr. (Taiwan)

Published in SPIE Proceedings Vol. 9524:
International Conference on Optical and Photonic Engineering (icOPEN 2015)
Anand K. Asundi; Yu Fu, Editor(s)

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