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Proceedings Paper

Design and manufacturing of a high-quality railroad crossing roundel lens
Author(s): Jack Fu; Alex Ning
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Paper Abstract

A new and improved railroad crossing roundel lens with 12 inch diameter, 0.21 inch thickness using polycarbonate was designed and manufactured. This design meets or exceeds all the recommendations by the Association of American Railroads. The combination of the new design, precision tooling fabrication, and computer-controlled processing technology has allowed this new design to out-perform the existing products on the market.

Paper Details

Date Published: 18 August 1995
PDF: 9 pages
Proc. SPIE 2622, Optical Engineering Midwest '95, (18 August 1995); doi: 10.1117/12.216806
Show Author Affiliations
Jack Fu, AOtec, Inc. (United States)
Alex Ning, AOtec, Inc. (United States)


Published in SPIE Proceedings Vol. 2622:
Optical Engineering Midwest '95
Rudolph P. Guzik, Editor(s)

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