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Proceedings Paper

All-optical difference engine for in-process defect inspection for roll-to-roll printed electronics
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Paper Abstract

The increasing capabilities of roll-to-roll (R2R) printing processes present challenges for quality control, requiring inprocess inspection of large substrates with high resolution at high speed. In this paper, an all-optical difference engine (AODE) sensor has been developed for in-process defect inspection for R2R printed electronics. The AODE sensor achieves high-speed inspection by utilising the principle of coherent optical subtraction to minimise data processing. The capability of the developed sensor is demonstrated using industrial printed electrical circuity samples and the sensor is capable of inspecting areas of 4 mm width with a resolution of the order of several micrometres.

Paper Details

Date Published: 7 March 2019
PDF: 8 pages
Proc. SPIE 11053, Tenth International Symposium on Precision Engineering Measurements and Instrumentation, 1105308 (7 March 2019); doi: 10.1117/12.2511140
Show Author Affiliations
Xiaobing Feng, The Univ. of Nottingham (United Kingdom)
Rong Su, The Univ. of Nottingham (United Kingdom)
Tuomas Happonen, VTT Technical Research Ctr. of Finland Ltd. (Finland)
Jian Liu, Harbin Institute of Technology (China)
Richard Leach, The Univ. of Nottingham (United Kingdom)


Published in SPIE Proceedings Vol. 11053:
Tenth International Symposium on Precision Engineering Measurements and Instrumentation
Jiubin Tan; Jie Lin, Editor(s)

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