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극미세 3 차원 형상제작의 효율성 향상을 위한 영역분할 단면법에 관한 연구
박상후(S.H. Park),임태우(T.W. Lim),양동열(D.Y. Yang),이신욱(S.Y. Yi),공홍진(H.J. Kong),이광섭(K.S. Lee) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
A subregional slicing method (SSM) is proposed to increase the nanofabrication efficiency of a nano-stereolithography (NSL) process based on two-photon polymerization (TPP). The NSL process can be used to fabricate 3D microstructures via the accumulation of layers of uniform thickness; hence, the precision of the final 3D microstructure depends on the layer thickness. The use of a uniform layer thickness means that, to fabricate a precise microstructure, a large number of thin slices is inevitably required, leading to long processing times. In the SSM proposed here, however, the 3D microstructure is divided into several subregions on the basis of the geometric slope, and then each of these subregions is uniformly sliced with a layer thickness determined by the geometric slope characteristics of each subregion. Subregions with gentle slopes are sliced with thin layer thicknesses, whereas subregions with steep slopes are sliced with thick layer thicknesses. Here, we describe the procedure of the SSM based on TPP, and discuss the fabrication efficiency of the method through the fabrication of a 3D microstructure.
간섭무늬 분석을 통한 게이지 블록의 거칠기 효과 보정용 광산란장치 교정
강주식(C.-S. Kang),김재완(J.W. Kim),조미정(M.J. Cho),공홍진(H.J. Kong) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
A roughness measuring system which comprises an integrating sphere and a stabilized laser has been fabricated with the aim of measuring the roughness correction value which is necessary in gauge block measurement by optical interferometry. To calibrate the system, a Newton’s ring interferometer has been introduced. The method how to calibrate the roughness measurement system has been described.