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 language | English |
|---|---|
| Title of host publication | Progress in Biomedical Optics and Imaging - Proceedings of SPIE |
| Volume | 8209 |
| DOIs | |
| State | Published - Apr 2 2012 |
| Event | Ophthalmic Technologies XXII - San Francisco, CA, United States Duration: Jan 21 2012 → Jan 22 2012 |
Other
| Other | Ophthalmic Technologies XXII |
|---|---|
| Country | United States |
| City | San Francisco, CA |
| Period | 1/21/12 → 1/22/12 |
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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
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 proceeding › Conference contribution
}
TY - GEN
T1 - Evaluation of water film thickness on contact lens by improved reflectometry technique
AU - Lu, Hui
AU - Wang, Michael Renxun
AU - Wang, Jianhua
PY - 2012/4/2
Y1 - 2012/4/2
N2 - 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.
AB - 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.
KW - Contact Lens
KW - Hydrophilic
KW - Reflectometry
UR - http://www.scopus.com/inward/record.url?scp=84859095527&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84859095527&partnerID=8YFLogxK
U2 - 10.1117/12.908321
DO - 10.1117/12.908321
M3 - Conference contribution
SN - 9780819488527
VL - 8209
BT - Progress in Biomedical Optics and Imaging - Proceedings of SPIE
ER -