목 적: 13.56 MHz Radio Frequency(RF) 고주파 송수신 장치를 만들고, 이를 이용하여 ITO안경렌즈 코팅 막의 두께와 전면커브에 대한 유도기전력 감소를 관찰하여 ITO 박막두께 측정을 연구하였다. 방 법: 전자빔 증착 장치를 이용하여 안경렌즈 하드 코팅 막 위에 다층막 코팅(SiO2/ZrO2/SiO2/ZrO2/SiO2/ITO/발수코팅막)을 하였는데, 이 때 ITO 코팅 시 이온빔 보조 장치를 사용하였다. 광투과율측정기로 ITO 코팅 안경렌즈의 투과율을 확인하였고, 13.56 MHz 수정발진소자를 사용하여 RF 고주파 송수신 장치를 만들었으며, 이 송수신 장치로부터 ITO 박막의 두께와 안경렌즈 커브에 의한 유도기전력의 감소량을 측정하였다. 결 과: 광투과율 측정 장치를 이용하여 ITO 안경렌즈 박막 두께에 따른 투과율을 측정한 결과, 가시광선 영역에서 ITO 박막이 두꺼워짐에 따라 처음에는 약간 증가하다가 점차 감소하는 경향을 나타내었다. 또한 RF 고주파 송수신 장치에서 안경렌즈를 RF 송수신 코일 위에 놓았을 때 유도기전력의 감소량은, 각각의 커브에서 ITO 두께가 커짐에 따라 유도기전력의 감소량이 증가함을 알 수 있었다. 또한 안경렌즈를 RF 송수신 코일 위에 놓았을 때 유도기전력의 감소량이 안경렌즈를 RF 송수신기 코일 안에 놓았을 때 유도기전력의 감소량보다 큰 것을 알 수 있었다. 결 론: 13.56 MHz RF 고주파 송수신 장치를 만들고, 이를 이용하여 ITO 안경렌즈 코팅 막의 두께와 전면커브에 대한 유도기전력 감소를 관찰한 결과, 안경렌즈를 RF 송수신코일 위에 놓았을 때 유도기전력의 감소량은 각각의 커브에서 ITO 두께는 커짐에 따라, 안경렌즈 전면 커브는 작아짐에 따라 증가함을 알 수 있었다.

Purpose: This paper was to make 13.56 MHz RF high frequency apparatus and study the measurement for the thicknesses of ITO films of Ophthalmic lenses by measuring the induced e.m.f. on receive coil with the thicknesses of ITO films and the front curves of Ophthalmic lenses. Methods: Hard coatings on Ophthalmic lenses were produced, and an electron beam evaporator was used to produce multi-coatings on hard coatings, which were consisted of SiO2/ZrO2/SiO2/ZrO2/SiO2/ITO/SiO2/water-repellent coating. In ITO coating, ion beam assisted gun was used. Transmittance meter was used to determine the transmittances of Ophthalmic lenses. RF high frequency apparatus was made using 13.56 MHz crystal oscillation device and the reduction of the e.m.f. induced on receive coil was measured according to the thicknesses and the front curves of Ophthalmic lenses by this apparatus. Results: The transmittance with the thicknesses of ITO films for the Ophthalmic lenses by the transmittance meter was measured. The result obtained was that the transmittances in the visible region was initially increased a little and then tended to decrease later. It was known that the reduction of the induced e.m.f. on receive coil was increased with the thicknesses of ITO films for the front curves of Ophthalmic lenses for the lens placing on the send-receive coil. It was also known that the reduction of the induced e.m.f. on receive coil for the lens placing on send-receive coil was greater than for the lens placing in send-receive coil. Conclusions: RF high frequency apparatus was made and the reduction of induced e.m.f. on receive coil with the thicknesses of ITO films and the front curves of Ophthalmic lenses was obtained using that apparatus. As a result, it was known that the reduction of the induced e.m.f. on receive coil for the lens placing on send-receive coil was increased with the thicknesess of ITO films and the decrease of front curvatures of Ophthalmic leness.

• 박문찬(신한대학교 뷰티헬스사이언스학부 안경광학전공) | Moon Chan Park