Healing of micro-cracks in optical glass using a pulsed laser

Nozomi Takayama, Yuta Nishide, Jiwang Yan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Optical glasses are used in a wide range of applications such as lenses in cameras and projectors, medical instruments and window panes. It is highly important to remove cracks in glass in order to prevent breakage, to prolong the lifetime of the glass part and to prevent injury to the user. In this study, the possibility of healing cracks in glass using laser irradiation is presented. Micro-indents, generated under indenting loads, were irradiated using a pulsed laser with a wavelength of 1064 nm using various coating materials at various laser fluences. The results show that laser irradiation greatly decreases the depth of the indents and closes the subsurface cracks. This is due to laser light interaction with glass and coating materials leading to a localized high temperature and the softening of glass.

Original languageEnglish
Title of host publicationProceedings of the 9th International Conference on Leading Edge Manufacturing in 21st Century, LEM 2017
PublisherJapan Society of Mechanical Engineers
Publication statusPublished - 2017 Nov 13
Event9th International Conference on Leading Edge Manufacturing in 21st Century, LEM 2017 - Hiroshima City, Japan
Duration: 2017 Nov 132017 Nov 17

Other

Other9th International Conference on Leading Edge Manufacturing in 21st Century, LEM 2017
CountryJapan
CityHiroshima City
Period17/11/1317/11/17

Keywords

  • Healing
  • Laser melting
  • Laser processing
  • Micro-cracks
  • Micro-indentation
  • Optical glass

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering

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  • Cite this

    Takayama, N., Nishide, Y., & Yan, J. (2017). Healing of micro-cracks in optical glass using a pulsed laser. In Proceedings of the 9th International Conference on Leading Edge Manufacturing in 21st Century, LEM 2017 [069] Japan Society of Mechanical Engineers.