Paper
27 February 2019 Coating geometry measurement of specialty fiber with dark-field illumination technique
Author Affiliations +
Proceedings Volume 10914, Optical Components and Materials XVI; 109141V (2019) https://doi.org/10.1117/12.2509502
Event: SPIE OPTO, 2019, San Francisco, California, United States
Abstract
We have proposed the systematic measurement of coating geometry for specialty fibers based on dark field illumination technique. The measured dark-field projection image shows clear interfaces between different refractive index materials. Using own developed image processing tool, the interfaces automatically detected and analyzed. Every degree of measurements provides circularity of each layer and then shows the center point of individual layer. Using this technique, coating diameter, coating non-circularity and coating ellipticity for double clad fiber were successfully measured and high resolution camera also detected some of existing coating defect and delamination.
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Gaye Park, Junho Lee, Derek Minwoo Jung, Byung Joo Kong, Dae Seung Moon, Chang Hyun Jung, Woojin Shin, Jaesun Kim, and Chihwan Ouh "Coating geometry measurement of specialty fiber with dark-field illumination technique", Proc. SPIE 10914, Optical Components and Materials XVI, 109141V (27 February 2019); https://doi.org/10.1117/12.2509502
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KEYWORDS
Coating

Specialty optical fibers

Cladding

Fiber coatings

Refractive index

Fiber lasers

Prisms

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