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TRIZ를 활용한 클린룸용 저소음 및 저분진 케이블 이송 체인 시스템의 개발
김두진,현동훈,김영일,Kim, Du-Jin,Hyun, Dong-Hoon,Kim, Young-Il 한국반도체디스플레이기술학회 2009 반도체디스플레이기술학회지 Vol.8 No.4
In this paper TRIZ was used to solve noise and dust reduction related to cable carrier chain system. On modern machines in a clean room, the contradictions arose due to increase noise and dust for the high speed were eliminated with 40 principles and seperation rules. As the results, the sound pressure level of the new carrier chain system was reduced to below 40 dB(A), and cleanroom classifications was satisfied with ISO class 4. In these successful results, TRIZ showed its usefulness in solving the design problems even with severe constraints.
초소형 초광각 비구면 유리렌즈의 초정밀 연삭가공기술에 관한 연구
김두진,유경선,현동훈,Kim, Doo-Jin,Yoo, Kyung-Sun,Hyun, Dong-Hoon 한국생산제조학회 2010 한국생산제조학회지 Vol.26 No.2
This research's goal is to process directly aspherics with big sagment and thin center thickness. If we can process directly aspherics with big sagment and thin center thickness, we think it greatly helps to reduce the time of developing optical system. We made very thin glass using diamond grinding whetstone regarding the trace of tool and the detailed drawing of tool super precisive aspherics that has 0.46mm center thickness and over $30^{\circ}$ segment, $0.1{\mu}m$ machining accuracy, 15nm surface accuracy. We think this research's result will be effective to open new market because it is applied not only cell phone optical system but also CCTV robot optical system, internet phone optical system. Also we expect to enhance the super strong brittle precisive process's possibility with super precisive processing technique that achieves 0.46mm glass center thickness as first in the world.
HOE를 첨가한 Polycarbonate Lens의 가공 특성에 관한 연구
권용재(Yong Jae Kwon),현동훈(Dong Hoon Hyun) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
In this work, diamond turing characteristics of an aspherical Polycarbonate surface with HOE are studied under different turning conditions such as feedrate, rotational speed of a workpiece and the depth of cutting. Also it has been examined under two state of things, one is improving surface roughness and other things is the fabrication for physical forms of HOE.
전유태(Yoo Tae Jun),현동훈(Dong Hoon Hyun) 한국생산제조학회 2006 한국생산제조학회지 Vol.15 No.1
A Study of birefringence in an aspheric lens of injection molding became more important to improve its optical properties. In the present study, the experimental study was carried out to investigate the relationship between birefringence and injection molded conditions. The processing factors are conditions include packing pressure, packing time, injection speed, melt temperature of optical resin and wall temperature. Birefringence was observed figures by using a polarizer in light. This experiments were carried out using the simulation software and injection molding machine.
Pickup 렌즈의 사출조건이 복굴절 및 굴절율에 미치는 영향에 관한 연구
이승준(Seung-Joon Lee),현동훈(Dong-Hoon Hyun) 한국생산제조학회 2007 한국생산제조학회지 Vol.16 No.6
Injection molding process factors such as molding temperature, injection pressure, flow rate and flow velocity, must be controlled properly in filling and packing phases in the injection molding process. In this study, effects of these factors on the injection molding were investigated through the flow analysis for birefringence and refractive index for pickup lens. This paper presents the birefringence and refractive index reduced with increasing the holding pressure and also the holding pressure time. And there are interaction with birefringence and fill time in the injection process. The optimal conditions through DOE are validated by using injection molding analysis.
김은일(Eun-Il Kim),현동훈(Dong-Hoon Hyun) 한국생산제조학회 2019 한국생산제조학회지 Vol.28 No.1
LED, is one of the major next generation lamps that, is currently used as a point light source and a surface light source. However, the absence of lighting continuity and hot-spot, which is the biggest shortcoming of LEDs, hindered the production of painting sensation and emotional (or dimensional) lighting of high-end images. Therefore, this work aims to expand and develop the application of future LEDs by supplementing the disadvantages of the current LEDs and presenting their alternatives. The concept and structure of the line light source (LLS), the possible commercialization of the light guide film (LGF), and the LGF applications are proposed by introducing a new conceptual light source using LGF instead of the existing point light source and surface light source. If the basic light performance and reliability are met by LLS, it can be applied for automotive exterior, interior lamp, and building indoor interior.
유경선(Kyung-Sun Yoo),현동훈(Dong-Hoon Hyun),장홍순(Hong-Soon Chang),박용우(Yong-Woo Park),박찬열(Chan-Yul Park) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
This study is aimed to design LSU lens for copier, then to make a effective mold after securing yield and stability of injection molding through injection molding simulation S/W. After designing f-θ lens, CY lens, CO lens which are major parts of LSU, we secured stability by analyzing the mold. It is expected that the results will be used for developing LSU system and globalizing the technique.
초소형 휴대폰 광학계의 금형 정밀도가 광학성능에 미치는 영향
예인수,정선환,최성대,현동훈,Ye, In-Soo,Cheong, Seon-Hwan,Choi, Seong-Dae,Hyun, Dong-Hoon 한국생산제조학회 2010 한국생산제조학회지 Vol.25 No.5
In cellphone optical systems, a tiny difference of manufacturing has a strong influence on camera lenses. This study aims to find out the worst result by tolerances come from all parts in optical performance. First, 3D Measure Instrument, Roundness Measure Instrument, and Wavelength Measure Instrument were used for greater precision by making and measuring the parts to see how different from the drawings. It was confirmed that even narrow tolerances could result in defects by assembling. Tolerances in assembly should be concerned as those in parts through the research.
김장윤(Kim Jang Yun),현동훈(Hyun Dong Hoon),홍철의(Hong Cheol Ui) 한국생산제조학회 2015 한국생산제조학회지 Vol.24 No.2
In this paper, the performance of a system was analyzed according to the design parameters of a LED secondary lens that can be applied at a very close range, e.g., for direct lighting or display systems. We designed the secondary lens of the very-close-range LED using an aspheric equation and analyzed its performance―particularly the angle of the beam spread, central luminous intensity, and light uniformity―with respect to the thickness of lens, radius, conic constant, and asphericity (4th). Our analysis shows that four parameters affect the performance. The simulation results indicate an optimal thickness of 1 mm and show that a larger radius yields higher performance. The optimal range for the conic constant was determined as -1.21 to -1.25, the optimal range for the asphericity was determined as 0.0047xx to 0.0049xx (4th).