목적: 비구면 디자인의 소프트 콘택트렌즈 ASCL(aspheric soft contact lens)로 굴절교정을 한 젊은 성인 근시안에서 콘택트렌즈 착용 후 안구의 구면수차와 코마수차 변화를 확인하였다. 방법: 건강한 성인 근시안 50명(평균 연령: 23.15±1.70세, 평균 등가구면굴절력: –2.90±1.75 D)을 대상으로 굴절교정용 ASCL(Biotrue, Bausch+Lomb, USA)을 착용시킨 후 검사실의 조도 100 lx에서 고위수차와 동공크기를 측정하였다. 고위수차는 Wavefront Analyzer를 사용하여 동공크기 4 mm 영역에서 측정하였고, 동공크기는 Pupillometer를 이용하여 3.5 m 거리의 물체를 주시하도록 한 후 암소시(scotopic condition, light off) 상태에서 측정하였다. 결과: 20대 근시안의 구면수차와 코마수차는 0.026±0.031 ㎛, 0.078±0.039 ㎛, ASCL 착용 후에는 0.019±0.026 ㎛ and 0.082±0.038 ㎛로 구면수차는 감소하고 코마수차는 유의하게 증가하였다. 대상안 중 구면수차가 감소한 경우는 전체의 68%로 양의 구면수차를 갖는 대상안에서 감소하였고, 증가한 경우는 11%로 음의 구면수차를 갖는 대상안에서 증가하였다. 코마수차는 대상안의 53%에서 증가하였고 19%에서는 변함이 없었으며 28%에서 감소하였다. 약도 및 중등도 근시안에서 구면수차는 근시도와 상관성이 없었고, 코마수차는 근시도가 높을수록 큰 것으로 나타났다. 결론: 조절자극이 없는 암소시 상태에서 ASCL 착용 후 안구의 구면수차는 양의 값을 갖는 경우에는 감소 하지만 음의 값을 갖는 경우에는 증가하였고, 이는 ASCL 디자인과 동공크기가 영향을 준 것으로 생각된다.

The recent development of electro-optic devices and anticorrosion media has led to the necessity to investigate infrared optical systems with solid-solid interfaces of materials that often have the characteristic of amorphousness. One of the most promising classes of materials for those purposes seems to be the chalcogenide glasses. Chalcogenide glasses, based on the Ge-Sb-Se system, have drawn a great deal of attention because of their use in preparing optical lenses and transparent fibers in the range of 3~12 um. In this study, amorphous Ge-Sb-Se chalcogenide for application in an infrared optical product design and manufacture was prepared by a standard melt-quenching technique. The results of the structural, optical and surface roughness analysis of high purity Ge-Sb-Se chalcogenide glasses are reported after various annealing processes.

In this study, mold core of can type lens for optical communication has been fabricated and heat transfer analysis has been conducted. Through this study, results were obtained as follows. Surface roughness of upper and lower cores by ultra precision grinding were Ra 0.002074(um) and 0.004316(um), respectively. Design P-V and Bestfit P-V as shape accuracy of upper core were 0.0858(um) and 0.0843(um), respectively, and those of lower core were 0.0957(um) and 0.0546(um), respectively. The temperatures of upper and lower surfaces of lens during machining obtained by heat transfer analysis were 576.05℃ and 576.4℃, respectively. In case of inner sleeve, it was estimated that the temperature of the side surface were 575.95℃ by heat transferred from lower core. The maximum and minimum temperatures of lower surface of lens were 576.4℃ and 575.96℃, respectively, according to the positions of holes for air circulation from out side.

This study presents the method of design and manufacturing of aspheric lens for flow visualization. Spherical lens is used in many fields especially flow visualization experiment. Because sperical lens has aberration by origin in flow visualization, there is case that is alternated by asperic lens. Most of asperic lens's modeling which is applied to Taylor's method. This study is designed to the aspheric lens by Euler's method, which is useful method for various geometric shape and complex experimental apparatus for flow visualization. In the present study, we have verified design and manufacturing aspheric lens through a flow visualization experiment.