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플라스틱 비구면 픽업 렌즈의 사출조건에 대한 수차변화 연구
현동훈(Dong-Hoon Hyun),이승준(Seung Joon Lee),이승수(Seoung Soo Lee) 한국생산제조학회 2004 한국생산제조시스템학회 학술발표대회 논문집 Vol.2004 No.4
In this study, the pattern of lens aberration was studied at different injection molding conditions such as injection speed, holding pressure, holding pressure time, mold temperature and cylinder temperature and, then, the results were analyzed with a laser interferometer. It was demonstrated that optimal condition of lens aberration could be achieved by adjustment of injection molding conditions.
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.
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.
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.
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.
광학 마이크로패턴의 광산란 Simulation에 관한 연구
윤철용(Chul-Yong Yoon),현동훈(Dong-Hoon Hyun),유경선(Kyung-Sun Yoo) 한국생산제조학회 2009 한국생산제조시스템학회 학술발표대회 논문집 Vol.2009 No.5
This paper has to gain visual effect as light scattering by various angle and phase using optical micro pattern for metal. Also applying to optical micro pattern for metal surface design by developing optical technology and ultra-precision machining technology.
노명재(Myeong-Jae Noh),현동훈(Dong-Hoon Hyun),장홍순(Hong-Soon Chang),박용우(Yong-Woo Park),박찬열(Chan-Yeal Park) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
In this paper, laser printer, laser scanning system, a core component of the unit is the study of system design. Laser scanning unit, in order to design a system, first check the first optical path and the optical path of the f-θ Lens, Cylinder Lens, Collimator Lens placed on such parts should be designed. This part of the core component of the various lens design flow in order to free surface, Aspheric, Toric, if the optical properties, such as injection molding and processing and the design should be taken into account.
HOE를 첨가한 Polycarbonate Lens의 가공 특성에 관한 연구
권용재(Yong Jae Kwon),현동훈(Dong Hoon Hyun) 한국생산제조학회 2006 한국생산제조시스템학회 학술발표대회 논문집 Vol.2006 No.5
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.