Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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A Study on Assessment of MTF Performance and Theoretical Analysis of Convex Trial Lenses

볼록 검안렌즈의 MTF 성능 분석 및 이론적 해석에 대한 연구

  • Bang, Hyun Jin (Department of Laser and Optical Information Engineering, Cheongju University) ;
  • Lee, Jong Ung (Department of Laser and Optical Information Engineering, Cheongju University) ;
  • Son, Byung Ho (Department of Optometry, Konyang University) ;
  • Ahn, Kyo Hoon (Department of Optometry, Konyang University) ;
  • Choi, Eun Jung (Department of Optometry, Konyang University)
  • 방현진 (청주대학교 레이저광정보공학과) ;
  • 이종웅 (청주대학교 레이저광정보공학과) ;
  • 손병호 (건양대학교 안경광학과) ;
  • 안교훈 (건양대학교 안경광학과) ;
  • 최은정 (건양대학교 안경광학과)
  • Received : 2013.07.23
  • Accepted : 2013.08.12
  • Published : 2013.10.25
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Abstract

White light MTF(Modulation Transter Function)s of biconvex trial lenses from 10 to 20 diopter (D) were represented as a function of angular frequency and visual acuity, and then they were compared with AIM(Aerial Image Modulation) curves. All of the biconvex trial lenses evaluated in on-axis mode had MTF performance that could resolve Landolt's ring up to visual acuity 2.0. However, in a half field angle of five degrees, the trial lens of 10 diopters was able to resolve Landolt's ring up to visual acuity 0.9, and that of 20 diopter only up to visual acuity 0.8. This means that the trial lenses in the case of a half field angle of five degrees do not have sufficient resolution to measure visual acuity by 1.0.

10 diopter에서 20 diopter까지의 양볼록 검안렌즈에 대한 백색광 MTF(Modulation Transter Function)를 각주파수와 시력으로 나타낸 후, 이들을 각각 AIM(Aerial Image Modulation) curve와 비교하였다. 축상시야에서 평가된 양볼록 검안렌즈 모두 시력 2.0까지는 란돌트 링을 분해할 수 있는 MTF를 가지고 있었다. 하지만 반시야각 $5.0^{\circ}$인 비축시야에서는 10 diopter의 검안렌즈는 시력 0.9, 20 diopter의 검안렌즈는 0.8까지 란돌트 링을 분해할 수 있는 것으로 평가되어 시력을 1.0까지 측정하기에는 충분한 해상력을 가지지 못한 것으로 평가되었다.

Keywords

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