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비구면 렌즈의 설계 및 제조를 위한 칼코게나이드계 유리의 물리적 화학적 특성 연구
고준빈,김정호,Ko, Jun-Bin,Kim, Jeong-Ho 한국생산제조학회 2010 한국생산제조학회지 Vol.10 No.6
In recent years the research has been focused on the preparation of special glasses, i.e., chalcogenide and heavy metal oxide ones that can transmit optical radiation above 2 um and also other optical parameters exceed those of silica based glasses. The attention in this paper is focused on chalcogenide glasses, on preparation of high quality base glass, for an application in infrared optical product design and manufacture. The amorphous materials of As-Se and Ge-As-Se chalcogenides were prepared by a standard melt-quenching technique. The compositions were mesaured by ICP-AES and EPMA, and structural and thermal properties were studied through various annealing processes. Several anomalies of glass transition and crystallization were observed in the DSC/DTA/TG results of the chalcogenide glass.
STS304 TIG 용접시 발생하는 잔류응력과 열응력 해석에 관한 연구
고준빈,박희상,Ko, Jun-Bin,Park, Hee-Sang 한국생산제조학회 2008 한국생산제조학회지 Vol.17 No.5
Residual stress caused in the weldments with high restraint force are often during welding observed in the weldments of large size nozzles or radial tanks. The reason is that quantitative analysis about thermal stresses during welding is lack for this weldments. To verify Finite Elements Method(FEM) theory, the temperature was measured with thermocouple in a real time in this paper. Also analysis of the thermal stress for welding condition is performed by ABAQUS program package on various welding condition in 304 stainless steel butt welding.
비구면 렌즈의 설계 및 제조를 위한 칼코게나이드계 유리의 물리적 화학적 특성 연구
고준빈(Jun-Bin Ko),김정호(Jeong-Ho Kim) 한국생산제조학회 2010 한국생산제조학회지 Vol.19 No.3
In recent years the research has been focused on the preparation of special glasses, i.e., chalcogenide and heavy metal oxide ones that can transmit optical radiation above 2 ㎛ and also other optical parameters exceed those of silica based glasses. The attention in this paper is focused on chalcogenide glasses, on preparation of high quality base glass, for an application in infrared optical product design and manufacture. The amorphous materials of As-Se and Ge-As-Se chalcogenides were prepared by a standard melt-quenching technique. The compositions were mesaured by ICP-AES and EPMA, and structural and thermal properties were studied through various annealing processes. Several anomalies of glass transition and crystallization were observed in the DSC/DTA/TG results of the chalcogenide glass.
비구면렌즈 설계를 위한 칼코게나이드 Ge-Sb-Se계 구조적, 광학적 특성 연구
고준빈(Jun Bin Ko),명태식(Tae Sik Myung) 한국생산제조학회 2014 한국생산제조학회지 Vol.23 No.2
The recent development of electro-optic devices and anticorrosion media has made it necessary investigate infrared optical systems with solid-solid interfaces of materials with amorphous characteristics. One of the most promising classes of materials for these purposes seems to be chalcogenide glasses, which are based on the Ge_Sb_Se system, have drawn much attention because of their use in preparing optical lenses and fibers that are transparent in the range of 3-12 um. In this study, a standard melt-quenching technique was used to prepare amorphous Ge_Sb_Sechalcogenideto be used in the design and manufacture of infrared optical products. The results of structural, optical, and surface roughness analyses of high purity Ge_Sb_Sechalcogenide glasses after various annealing processes reported.
고준빈(Jun-Bin Ko),김우강(Woo-Kang Kim),전택종(Tek -Jong Jeon) 한국기계가공학회 2008 한국기계가공학회지 Vol.7 No.4
This study aims to find the optimal cutting conditions, which are obtained by grinding condition, and the grinding characteristics and condition of constant velocity joint were investigated with respect to wheel velocity, depth of cut, feed speed. Grinding machine has been widely used in manufacturing optical reflects of metal. Such as steel are easy to be machined because of their proper material. As a result I obtained the data of grinding conditions makes good surface roughness and the optimal condition of grinding and get the mesh condition. The purpose of this study is to find the optimum grinding wheel characteristics for cutting constant velocity joint.