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http://dx.doi.org/10.14479/jkoos.2014.19.4.471

A Study on the Method for the Local Transmittance Measurements of the Ocular Lens  

Park, Sang-Kook (Dept. of Physics, Kyungpook National University)
Ri, Hyeong-Cheol (Dept. of Physics, Kyungpook National University)
Youk, Do-Jin (Dept. of Ophthalmic Optics, Suseong College)
Sung, Duk-Yong (Dept. of Ophthalmic Optics, Suseong College)
Kang, Sung-Soo (Dept. of Ophthalmic Optics, Suseong College)
Publication Information
Journal of Korean Ophthalmic Optics Society / v.19, no.4, 2014 , pp. 471-477 More about this Journal
Abstract
Purpose: We have analyzed the transmittance distribution of the ocular lens using local transmittance microscope to investigate the optical homogeneity of the lens. Methods: The transmittance of the laser which is focused on the surface of the ocular lens was measured by using the photo-detector and lock-in amplifier and analyzed. Multi-coated, uncoated, and progressive lenses were analyzed. Results: In the measurement of the progressive lens and a physical stimulated lens, local transmittance microscopy analysis showed a high degree of match with the measurement results through the optical microscope. In addition, the average value of the transmittance is reduced and the standard deviation was increased in the presence of optical defects. In unstimulated lens, there are a large impact on transmittance whether the anti-reflective coating is presence or absence in both the local transmittance microscopy and general transmittance analysis. Conclusions: The distribution of the transmittance measured by local transmission microscopy were changed when the various stimulus is applied to the lenses. These analyzes by local transmission microscopy can be utilized as a way to evaluate or determine the uniformity of the coating film or lens.
Keywords
Transmittance; Local properties; Ocular lens; Coating film; Microscope;
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1 Kang SS, Lee SH, Jang YS, Park SC. The electrical and optical characteristics of ATO films prepared by RF magnetron sputtering methods. J Korean Ophthalmic Opt Soc. 2010;15(4):299-305.
2 Corzine JC, Greer RB, Bruess RD, Lee GK, Scaief AL. Effects of coatings on the fracture resistance of ophthalmic lenses. Optom. Vis. Sci. 1996;73(1):8-15.   DOI   ScienceOn
3 Moon BY, Hwang KJ, Lee YJ, Yu DS. Changes of the plastic lens properties caused by etching of the coating films. J Korean Ophthalmic Opt Soc. 2010;15(1):55-60.   과학기술학회마을
4 Noh HR. Changes of thin film coating on polymer lenses with varying temperature. J Korean Ophthalmic Opt Soc. 2014;19(1):1-8.   과학기술학회마을   DOI   ScienceOn
5 Sung PJ. Introduction to Optometry Optometric goods, 3rd Ed. Seoul: Daihak, 2008:14-15.
6 Korean Industrial Standard, KS P 4404:2009.
7 Korean Industrial Standard, KS P ISO 8980-1:2009.
8 Crabtree GW, Liu JZ, Umezawa A, Kwon WK, Sowers CH, Malik SK et al. Large anisotropic critical magnetization currents in single-crystal $YBa_2Cu_3O_{7-{\delta}}$, Phys. Rev. B 1987;36:4021-4024.   DOI   ScienceOn
9 Larbalestier D, Gurevich A, Feldmann DM, Polyanskii A. High-Tc superconducting materials for electric power applications, Nature. 2001;414:368-377.   DOI   ScienceOn
10 Gross R and Koelle D. Low temperature scanning electron microscopy of superconducting thin films and Josephson junctions, Rep. Prog. Phys. 1994;57:651-741.   DOI   ScienceOn
11 Wang LB, Price MB, Young JL, Kwon C, Haugen TJ, Barnes PN. Observation of nonuniform current transport in epitaxial $YBa_2Cu_3O_{7-x}$ film near the superconducting transition temperature, Physica C. 2004;405:240-244.   DOI
12 Kim SR, Kim JY, Kim KY, Park MJ. The effect of physical and chemical stimuli on ophthalmic lens coating. J Korean Ophthalmic Opt Soc. 2011;16(3):237-245.
13 Sugimoto A, Yamaguchi T, Iguchi I. Evaluation of supercurrent distribution in high-$T_c$ superconductor by scanning SQUID microscopy, Physica C. 2001;357-360:1473-1477.   DOI   ScienceOn
14 Oral A, Bending SJ, Henini M. Real-time scanning Hall probe microscopy, Appl. Phys. Lett. 1996;69:1324-1326.   DOI   ScienceOn
15 Park SK, Cho BR, Park HY, Ri H-C. Analysis of the local current in GdBCO coated conductors using low-temperature scanning laser and Hall probe microscopy, Cryogenics, 2012;52:744-748.   DOI   ScienceOn