DOI QR코드

DOI QR Code

안경 렌즈의 국소적 투과율 측정을 위한 방법에 관한 연구

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

  • 투고 : 2014.10.29
  • 심사 : 2014.12.11
  • 발행 : 2014.12.31

초록

목적: 국소 투과율 현미경을 이용하여 안경렌즈의 투과율 분포를 분석함으로써 렌즈의 광학적 균질성을 연구하고자 한다. 방법: 안경렌즈 표면에 집광된 레이저의 투과율을 광검출기와 락인앰프로 측정하고 그 결과를 분석하였다. 코팅되지 않은 렌즈와 멀티 코팅이 된 렌즈 그리고 누진렌즈가 시료로서 분석되었다. 결과: 누진렌즈와 물리적 자극이 가해진 렌즈의 측정 결과에서 국소 투과율 현미경 분석 결과가 광학 현미경을 통한 측정 결과와 높은 일치도를 보였다. 또한 광학적 결함이 있는 곳에서 투과율의 평균값은 감소하고 표준편차는 증가하였다. 자극이 가해지지 않은 렌즈에서는 반사방지 코팅의 유무가 투과율에 큰 영향을 미치는 것을 국소 투과율 현미경과 일반적 투과율 분석 모두에서 공통적으로 분석되었다. 결론: 시료에 다양한 자극이 가해졌을 때 투과율의 분포에 변화가 생김을 국소 투과율 현미경을 통해 확인하였다. 국소 투과율 현미경을 통한 이러한 분석은 렌즈 혹은 코팅막의 균일도를 평가 혹은 확인할 수 있는 하나의 방법으로 활용될 수 있다.

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.

키워드

참고문헌

  1. 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. https://doi.org/10.1097/00006324-199601000-00002
  2. 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.
  3. 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.
  4. 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.
  5. Noh HR. Changes of thin film coating on polymer lenses with varying temperature. J Korean Ophthalmic Opt Soc. 2014;19(1):1-8. https://doi.org/10.14479/jkoos.2014.19.1.1
  6. Sung PJ. Introduction to Optometry Optometric goods, 3rd Ed. Seoul: Daihak, 2008:14-15.
  7. Korean Industrial Standard, KS P 4404:2009.
  8. Korean Industrial Standard, KS P ISO 8980-1:2009.
  9. 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. https://doi.org/10.1103/PhysRevB.36.4021
  10. Larbalestier D, Gurevich A, Feldmann DM, Polyanskii A. High-Tc superconducting materials for electric power applications, Nature. 2001;414:368-377. https://doi.org/10.1038/35104654
  11. Gross R and Koelle D. Low temperature scanning electron microscopy of superconducting thin films and Josephson junctions, Rep. Prog. Phys. 1994;57:651-741. https://doi.org/10.1088/0034-4885/57/7/001
  12. 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. https://doi.org/10.1016/j.physc.2004.02.003
  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. https://doi.org/10.1016/S0921-4534(01)00590-1
  14. Oral A, Bending SJ, Henini M. Real-time scanning Hall probe microscopy, Appl. Phys. Lett. 1996;69:1324-1326. https://doi.org/10.1063/1.117582
  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. https://doi.org/10.1016/j.cryogenics.2012.06.006

피인용 문헌

  1. A Comparative Study on the Local Transmittance Homogeneity of the Ocular Lens vol.20, pp.4, 2015, https://doi.org/10.14479/jkoos.2015.20.4.471
  2. Effect of Strain on Eyeglasses Lens on Visual Field Clearness vol.23, pp.4, 2018, https://doi.org/10.14479/jkoos.2018.23.4.461