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정인숙,반민성,손광은,이병백,Jeong, In-Sook,Ban, Min-Sung,Son, Kwang-Eun,Lee, Byoung-Bag 대한기계학회 2013 대한기계학회 논문집. Transactions of the KSME. C, 산업기술과 혁신 Vol.1 No.1
$F{\theta}$ 렌즈는 레이저 프린터의 LSU(Laser Scanning Unit)의 중요 부품으로서 $F{\theta}$ 렌즈를 통과한 주사빔의 상 위치는 주사빔의 렌즈 입사각에 비례한다. 본 논문에서는 당사에서 개발한 A4 사이즈용 $F{\theta}$ 렌즈를 설계, 제작하고 보정하는 과정을 소개하였다. 렌즈 개발에서 광학설계는 Zemax를 사용하였고 주사빔의 주주사방향 및 부주사방향의 왜곡을 최소화 하기 위하여 렌즈면은 특수한 토릭면으로 하였다. 렌즈 금형은 1nm 의 분해능을 갖는 초정밀 가공기로 제작하였다. 렌즈 사출 후 성능을 평가하고 측정값과 설계값의 차이를 바탕으로 설계보정식을 유도하여 렌즈 금형을 수정하였다. 금형 수정 후 사출렌즈의 재측정 결과 초기 설계값에 가까운 성능을 확인하였다. Ftheta Lens, whose image height is proportional to its field view angle, is one of the most important parts in Laser Scanning Unit(LSU). In this paper $f{\theta}$ lens design, mold production and modification method of lens design and mold are introduced. Lens design was carried out with Zemax and Special Toric surfaces were applied for lens surfaces to minimize distortion both in main and sub scanning directions. And a high precision machine with 1nm resolution was used to fabricate lens mold cores. After injection the lens was evaluated and the difference from design was examined. This difference was compensated by modifying lens design and new lens mold cores were made according to modified lens design to obtain the quality of original design.
재생형 연료 펌프의 채널 면적 변화가 성능 특성에 미치는 영향에 대한 수치해석적 연구
이경용(Kyoung-Yong Lee),최영석(Young-Seok Choi),손광은(Kwang-Eun Son) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-
The effects of channel area on the performance of regenerative type fuel pump were numerically studied by commercial CFD code(ANSYS CFX-10). To examine the effects of a channel area only, the shapes of the side channel and blade were simplified. The channel area affected the flow characteristics of the internal recirculation flow between side channel and blade groove and also made differences of the overall performance. These loss mechanism with circulation flow were adopted as a loss coefficient in the performance prediction program. The loss coefficient was newly derived from the results of calculations with different channel area, and compared with experimental results in the reference paper and used to modify the performance prediction program. The circulation flow characteristics with different channel area, which were related with loss mechanism, were also discussed with the results of 3-dimensional flow calculations.
孫光殷 全南大學校 人文科學硏究所 1995 용봉인문논총 Vol.24 No.-
North Korean poetry has been discussed enough so far because of the ideological division on the Korean Peninsula. Lately, however, research and revaluation of the books on which the ban was lifted have been conducted at the level of continuity of the literature history as a national community. Considering the situational context, thus, I would like to describe literary history which includes the works excluded from discussion during the Cold War period. This paper examines some aspects of North Korean poetry, comparing the true and false side of proletarian literature of the 20's and 30's which has been addressed quite differently. As s result, it was observed that most of North Korean poetry had some specific purpose. They could be characterized as the "Juche"(self-reliance) literary theory allegedly created by the lake Kim Il-sung, literature as a study on hnmanity, literature serving the socialist revolution, and socialist realism literature. Poetry of North Korea mainly beautifies Kim's anti-Japanese struggles during the Japanese colonial rule over Korea, idolizes Kim Il-sung, pledges loyality, and admires the revolution or various national policies. Many of North Korea poem are and they were composed toward a special purpose official manifesto. Compared with the fact that South Korean poetry expresses the truth and pain appealing to the basic human mind, North Korean poetry is far differant from artistic essence. But we should note that the heterogeneity between the two comes from the fact that South Korean poetry was also innocence-oriented and sought for art for art's sake under the liberalism just as North Korean poetry emphasized the loyality to the Party, the working class, and the people's duty, etc. on the basis of socialism. To overcome this heterogeneity as well as recover homogeneity we need to open each other as a national community leaving behind the ideological friction. For example, we need to exchange mutually for reunification of our partitioned nation, to form national sympathy, and to introspect philosophically on the unflexible creation of North Korean poetry. In conclusion, we have to determine how to recover homogeneity of human beings, depending on whether we view the object of poetry as a phenomenon or as essence.