Analysis of the light transmission ability of reinforcing glass fibers used in polymer composites

Gergely Hegedus, Tamás Sarkadi, T. Czigány

Research output: Contribution to journalArticle

6 Citations (Scopus)


This goal of our research was to show that E-glass fiber bundles used for reinforcing composites can be enabled to transmit light in a common resin without any special preparation (without removing the sizing). The power of the transmitted light was measured and the attenuation coefficient, which characterizes the fiber bundle, was determined. Although the attenuation coefficient depends on temperature and the wavelength of the light, it is independent of the power of incident light, the quality of coupling, and the length of the specimen. The refractive index of commercially available transparent resins was measured and it was proved that a resin with a refractive index lower than that of the fiber can be used to make a composite whose fibers are capable of transmitting light. The effects of temperature, compression of the fibers, and the shape of fiber ends on the power of transmitted light were examined. The measurement of emitted light can provide information about the health of the fibers. This can be the basis of a simple health monitoring system in the case of general-purpose composite structures.

Original languageEnglish
Article number637
Issue number6
Publication statusPublished - Jun 10 2017



  • Attenuation coefficient
  • Light transmission
  • Polymer resins
  • Refractive index
  • Reinforcing glass fiber
  • Sensor
  • Structural health monitoring

ASJC Scopus subject areas

  • Materials Science(all)

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