Evaluation of water film thickness on contact lens by improved reflectometry technique

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

1 Citation (Scopus)

Abstract

We report the evaluation of water film on a contact lens using an improved optical reflectometry technique. A galvanometer scanner is added to an optical reflectometry system for fast measurement beam alignment. Light from a Tungsten Halogen light source travel down a 2x1 fiber coupler, go through the focusing lens and the galvanometer scanner, and light up the water film on the contact lens. The air/water and water/contact lens interfaces reflect the light back to the fiber, where the spectral dependent reflection data is acquired by the fiber coupled spectrometer for analysis. From the reflective spectra, the water film thickness can be calculated using predictor-corrector curve fitting method. In the scanning selection and the curve fitting calculation, a band stop filter is applied to the reflectance spectrum to eliminate data noise.

Original languageEnglish
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume8209
DOIs
StatePublished - Apr 2 2012
EventOphthalmic Technologies XXII - San Francisco, CA, United States
Duration: Jan 21 2012Jan 22 2012

Other

OtherOphthalmic Technologies XXII
CountryUnited States
CitySan Francisco, CA
Period1/21/121/22/12

Fingerprint

contact lenses
Contact lenses
Contact Lenses
Film thickness
film thickness
Water
evaluation
Galvanometers
Light
galvanometers
water
curve fitting
Curve fitting
scanners
fibers
Optical fiber coupling
Optical Devices
Tungsten
Halogens
Fibers

Keywords

  • Contact Lens
  • Hydrophilic
  • Reflectometry

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

Cite this

Lu, H., Wang, M. R., & Wang, J. (2012). Evaluation of water film thickness on contact lens by improved reflectometry technique. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE (Vol. 8209). [82091S] https://doi.org/10.1117/12.908321

Evaluation of water film thickness on contact lens by improved reflectometry technique. / Lu, Hui; Wang, Michael Renxun; Wang, Jianhua.

Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 8209 2012. 82091S.

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

Lu, H, Wang, MR & Wang, J 2012, Evaluation of water film thickness on contact lens by improved reflectometry technique. in Progress in Biomedical Optics and Imaging - Proceedings of SPIE. vol. 8209, 82091S, Ophthalmic Technologies XXII, San Francisco, CA, United States, 1/21/12. https://doi.org/10.1117/12.908321
Lu H, Wang MR, Wang J. Evaluation of water film thickness on contact lens by improved reflectometry technique. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 8209. 2012. 82091S https://doi.org/10.1117/12.908321
Lu, Hui ; Wang, Michael Renxun ; Wang, Jianhua. / Evaluation of water film thickness on contact lens by improved reflectometry technique. Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 8209 2012.
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