• Korean Journal of Optics and Photonics
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• v.32 no.6
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• pp.296-305
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• 2021

This paper reports a study on the long axis performance of the line beam optics used in laser lift-off equipment for the OLED manufacturing process. The centration errors of the cylindrical lens are classified and defined in seven categories, and the measurement methods are presented. The cylindrical fly-eye lens is analyzed theoretically and experimentally to find the influence of the surface shape error and decentering error on the long axis performance of the line beam optics system. A future research direction is also presented to improve the long axis performance.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.05a
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• pp.735-737
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• 2023

본 논문에서는 대퇴골의 3D 메쉬 모델에 대해 원통형 좌표계(cylindrical coordinate system)를 생성하는 방법을 제안한다. 원통형 좌표계는 대퇴골 메쉬의 방향에 따라 장축 및 단축을 결정한 뒤, 대퇴골을 포함하는 원통(right circular cylinder)을 계산하여 생성된다. 실험을 통해, 생성된 원통형 좌표계에서 균일하게 생성한 삼각형 메쉬(triangular mesh)를 대퇴골 메쉬에 투사한 결과를 보인다.

• Korean Journal of Plant Resources
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• v.29 no.5
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• pp.564-573
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• 2016

This research was performed to develop mass propagation method of round-leaved sundew (Drosera rotundifolia L.) for improving horticultural usefulness. Seeds were collected around Hwaseong-si, Gyeonggi-do in October of 2011 and experimented upon while being dry-stored at 4 ± 1.0℃ (darkness). Seed length of a major and minor axis were 1.58 ± 0.060 and 0.21 ± 0.016 ㎜, respecrively, and weight of 1,000 seeds was 6.24 ± 0.172 ㎎. Seeds were thus classified as ‘dwarf seeds’. Regarding the dormancy type, since round-leaved sundew seeds were dormancy broken and germinated at 20~30℃ under the light condition after wet-chilling treatment for 12 weeks, seeds were estimated to have physiological dormancy. Germination conditions of dormancy broken seeds were found to be 20℃ and light condition (54.7%), but germination decreased at higher temperature. Percent germination (PG), germination energy (GE), mean germination time (MGT) and T₅₀ were effectively improved by chemical treatment such as GA₃ 200 ㎎/L + kinetin 20 ㎎/L and wet-chilling treatment for 14 weeks. In conclusion these optimal conditions were thought to be a useful method for raising seedling uniformly.