• 한국광학회:학술대회논문집
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• 한국광학회 2004년도 제15회 정기총회 및 동계학술발표회
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• pp.204-205
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• 2004

• 한국지구물리탐사학회:학술대회논문집
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• 한국지구물리탐사학회 2011년도 학술대회 및 정기총회
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• pp.119-122
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• 2011

• 한국재료학회:학술대회논문집
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• 한국재료학회 1998년도 IUMRS-ICEM ABSTRACT BOOK
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• pp.92.2-92
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• 1998

• 한국광학회:학술대회논문집
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• 한국광학회 2002년도 제13회 정기총회 및 2002년도 동계학술발표회
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• pp.100-101
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• 2002

This paper show lens design and simulation for microdisplay system with two mirror, Lens design optimized consider to spherical aberration, astigmatism, distortion, and chromatic aberration.

• 영어어문교육
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• 제12권1호
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• pp.205-220
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• 2006

This paper argues how Adrienne Kennedy embodies the features of a black woman's self-identity in Funnyhouse of a Negro. An educated young black woman, Sarah lives in a funnyhouse which is surrounded by mirrors. The reflections in the funnyhouse's mirrors are a metaphor of a black woman's life in America. Sarah's narrative is played out by four "selves," differing by sex and race. These selves imply her mixed cultural heritage. Two white women symbolize white European royalty, Jesus expresses christianity which is the basis of western culture and Lumumba represents Africa. Sarah's desire for whiteness is concentrated on skin color and hair. She longs for pallid skin and straight hair of the white race. Sarah wanted to be white, but her "tainted blood" by her black father made that impossible. Sarah is always obsessed by the fear of her father and the unhappy destiny of her mother. Ceaseless knocking, paralyzed images of lifelessness and surreal dreams effectively show her fear. Sarah's selves remain fragmented in the funnyhouse. Sarah exposures the black woman's anger and frustration through her death. Her death is a gesture of denial and refusal of the dominant society. At the same time, it was her last choice and struggle not to completely lose her own identity.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2002년도 춘계학술대회 논문집
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• pp.59-64
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• 2002

One of the exciting research areas of the X-ray microscope is the observation of a living cell. In order to study a living cell with high resolution the order of the several tens nm, we need to improve the efficiency of mirrors which are components of an X-ray microscope system. In this paper we present the mirror design and manufacture to give a high resolution and reflectivity. We designed Wolter type I the condenser and objective mirror with the several tens of nm resolution. According to mirror design. we made the program using the visual basic. Using the new processing method as well as the ultra-precision diamond cutting, we directly processed the inside of an aluminum hulk in order to manufacture mirrors. From the experimental result, we think that the new processing method will improve a high reflectivity through the improved cutting tools and optimum cutting conditions.

• International Journal of Automotive Technology
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• 제5권4호
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• pp.277-285
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• 2004

This paper describes an intelligent mirror adjustment system that rotates a pair of side mirrors and the room mirror of a car to the optimal position for a driver by using the location of the driver's pupils. A stereo vision system measures the three-dimensional coordinates of a pair of pupils by analyzing the input images of stereo B/W CCD cameras mounted on the instrument panel. This system determines the position angle of each mirror on the basis of information about the location of the pupils and rotates each mirror to the appropriate position by mirror actuators. The vision system can detect the driver's pupils regardless of whether it is daytime or nighttime by virtue of an infrared light source. Information about the pair of nostrils is used to improve the correctness of pupil detection. This system can adjust side mirrors and the room mirror automatically and rapidly by a simple interface regardless of driver replacement or driver's posture. Experiment has shown this to be a new mirror adjustment system that can make up for the weak points of previous mirror adjustment systems.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 심포지엄 논문집 정보 및 제어부문
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• pp.113-115
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• 2005

This thesis presents a method for 3D modeling of facial expression from frontal and mirror-reflected multi-image. Since the proposed system uses only one camera, two mirrors, and simple mirror's property, it is robust, accurate and inexpensive. In addition, we can avoid the problem of synchronization between data among different cameras. Mirrors located near one's cheeks can reflect the side views of markers on one's face. To optimize our system, we must select feature points of face intimately associated with human's emotions. Therefore we refer to the FDP (Facial Definition Parameters) and FAP (Facial Animation Parameters) defined by MPEG-4 SNHC (Synlhetic/Natural Hybrid Coding). We put colorful dot markers on selected feature points of face to detect movement of facial deformation when subject makes variety expressions. Before computing the 3D coordinates of extracted facial feature points, we properly grouped these points according to relative part. This makes our matching process automatically. We experiment on about twenty koreans the subject of our experiment in their late twenties and early thirties. Finally, we verify the performance of the proposed method tv simulating an animation of 3D facial expression.

• 한국광학회지
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• 제13권3호
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• pp.209-214
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• 2002

기판의 표면거칠기가 반사경의 산란에 미치는 영향을 조사하였다. 기판의 표면거칠기가 다른 다섯 종류의 기판에 이온빔 스퍼터링 방법과 전자총 증착 방법으로 각각 반사율이 1에 가까운 고반사율 박막을 증착하고 산란을 TIS 방법으로 측정하였다. 기판의 표면거칠기가 2$\AA$ 이상인 경우의 기판의 산란에 대한 반사경 산란 비율은 표면거칠기가 2$\AA$ 미만인 경우의 산란 비율에 비하여 급격한 증가를 나타냄을 알 수 있었으며, 기판의 표면거칠기가 낮은 경우 반사경의 산란은 기판의 표면거칠기보다 반사경을 구성하는 박막의 미세구조에 의존하는 것으로 판단되었다. 한편 반사경 중에서 가장 작은 산란은 2.1 ppm이었고, 이것은 표면거칠기 0.23$\AA$인 기판에 이온빔 스퍼터링 방법으로 제작되었다.

• 한국광학회지
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• 제7권4호
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• pp.370-374
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• 1996

Superstructure Grating Distributed-Bragg Reflector(SSG DBR) 레이저는 비교적 높은 Mode Suppression Ratio(MSR)을 가지면서 넓은 파장 대에서 불연속 파장가변 특성을 가진다. 그러나 SSG DBR 레이저는 출력파장을 가변 시킬 때 파장가변 영역을 구성하는 채널 중 몇 개가 빠지는 현상이 실험을 통해 관찰되어 왔다. 우리는 수치해석적인 시뮬레이션을 통해 이 현상이 SSG DBR 거울을 구성하는 linearly chirped grating의 불균일한 반사 피크 높이에 의한 영향임을 발견했고 반사율 피크 높이를 거의 균일하게 만들 수 있는 nonlinearly chirped grating을 제안한다. 그리고 이 거울을 가지는 파장 가변 레이저가 채널의 손실 없이 넓은 파장가변 영역에서 동작하는 것을 확인했다. 그러므로 nonlinearly chirped grating을 가지는 DBR 거울은 넓은 파장가변 영역을 가지는 가변 레이저에 적용할 수 있다.