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양순철(Sun Choel Yang),허명상(Myung Sang Huh),김상혁(Sang Hyuk Kim),이길재(Gil Jae Lee),이상용(Sang Yong Lee),국명호(Myung Ho Kook),장기수(Ki Soo Chang),유선영(Seon Young Ryu),원종호(Jong Ho Won),김건희(Geon Hee Kim) Korean Society for Precision Engineering 2012 한국정밀공학회지 Vol.29 No.3
In nowadays, the infrared optics is frequently employed to various fields such as military, aerospace, industry and medical. To develop the infrared optics, special glasses which can transmit infrared wave are required. Ge(Germanium), Si(silicon), and fluoride glasses are typically used for material of the infrared optics. Compared with Ge and Si glasses, fluoride glasses have high transmittance in infrared wavelength range. Additionally, UV(ultraviolet) and visible light can be transmitted through fluoride glasses. There characteristics of fluoride glasses makes it possible to evaluate optical performance with generally used visible testing equipment. In this paper, we used design of experiment to find ultra precision machining characteristic of Ge and fluoride glasses and optimized machining process to obtain required form accuracy of PV(Peak to Valley) 0.2 ㎛.