Optical thin film inspection using parallel spectral domain optical coherence tomography

Muhammad Faizan Shirazi, Ruchire Eranga Wijesinghe, Naresh Kumar Ravichandran, Pilun Kim, Mansik Jeon, Jeehyun Kim

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The conventional Fourier domain optical coherence tomography system requires single scanner for two dimensional cross-sectional image and two scanners for volumetric image. Parallel spectral domain optical coherence tomography has advantage of single scanner for volumetric image, while two dimensional cross-sectional images are obtained by parallel acquisition of illuminated line on sample using area camera. In this study, the industrial inspection of optical thin film on touch screen panels was demonstrated using parallel spectral domain optical coherence tomography. The cross-sectional and volumetric images were acquired to detect the internal inf layer defects in optical thin film which are difficult to observe using visual or machine vision based inspection methods. The results indicate the possible application of the proposed system in touch screen panels inspection for quality assurance of product at consumer end.

Original languageEnglish
Title of host publication25th International Conference on Optical Fiber Sensors
EditorsLibo Yuan, Youngjoo Chung, Wei Jin, Byoungho Lee, John Canning, Kentaro Nakamura
PublisherSPIE
ISBN (Electronic)9781510610910
DOIs
StatePublished - 2017
Event25th International Conference on Optical Fiber Sensors, OFS 2017 - Jeju, Korea, Republic of
Duration: 24 Apr 201728 Apr 2017

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10323
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference25th International Conference on Optical Fiber Sensors, OFS 2017
Country/TerritoryKorea, Republic of
CityJeju
Period24/04/1728/04/17

Keywords

  • Industrial inspection
  • Line field
  • Liquid crystal display
  • Optical thin film
  • Parallel scanning
  • Spectral domain optical coherence tomography
  • Touch screen panel

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