• Journal of the Korean Society of Manufacturing Process Engineers
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• v.11 no.3
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• pp.1-6
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• 2012

This study is focused on simulation technology in injection molding process for plastic optic lenses. The CAE program, $3D-TIMON^{TM}$ is used for the injection molding simulation with O-PET resin material. The design for different gate shape and runner layout has been under review by CAE simulation results. Moreover, the prediction of birefringence and polarized light in injection molded optic lenses has been tested by the CAE Program. The simulation results have been expected to effectively use in the design of injection molding mould.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.19 no.2
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• pp.195-199
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• 2006

We report a novel simulation method to calculate optical transmission considering the real paths of optic introduced in a unit pixel of TFT-LCDs using three-dimensional molecular director simulation of the tensor model. The simulation of optical path transmission profile was carried out by calculating new permittivity considered the real paths of optic in liquid crystal cell. As a result, it was clarified that the electro-optic characteristics such as movement of disclination line, contrast ratio and transmittance profile show a large difference according to the viewing angle compared with the conventional method.

• 제어로봇시스템학회:학술대회논문집
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• 1996.10b
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• pp.1149-1152
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• 1996

Recently visual servo control is an important feature of an intelligent robot system. In this paper, we presents a Kalman filter approach for estimation of the linear optic flow model which is utilized in the visual servoing of a mobile robot. The proposed method is also compared with the conventional least mean square method via computer simulation.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.651-652
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• 2013

• Journal of the Optical Society of Korea
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• v.11 no.2
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• pp.55-58
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• 2007

We propose a systematic method for design of fiber-optic surface plasmon resonance (SPR) sensors. We used rigorous coupled wave analysis (RCWA) for analysis of the transmission spectrum, and the (1+1) evolution strategy (ES) was employed as an optimization tool. The simulation results show that the optimization method presented here is very useful in designing fiber-optic SPR sensor for strain and temperature measurement. This algorithm can be extended to another objective function with other weighting factors and optical parameters.

• Transactions of the Korean Society of Automotive Engineers
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• v.7 no.6
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• pp.231-240
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• 1999

The most important thing to be considered in designing stop lamps for automobiles is to satisfy the photometric requirement in various countries and achieve the equal image. To meet these requirements, parabolic reflector and fish-eye optics has been widely applied. The form of the embodied optic is most important in satisfying the photometric requirement and achieving the equal image because the impact of fish-eye optic is decisive. In this study, a series of researches has been performed to optimize of the fish-eye optic by analyzing beam pattern through the photometric simulation based on CATAI program. The optimized results have been shown to meet the various photometric requirements including non dazzling condition considering the following car. The methodology of this study is excepted to influence the development procedure of light system. The time and cost for the system development would be greatly saved by suing this simulaion technique.

• Journal of KSNVE
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• v.9 no.3
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• pp.565-569
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• 1999

Recently, fiber optic hydrophone is a subject which has attracted as a underwater acoustic sensor. In this study, Finite element modeling of fiber optic hydrophone for hollow cylindrical mandrel was performed and the acoustic sensitivity was calculated to estimate the performance of single element fiber optic hydrophone. And acoustic sensitivity was measured in acoustic water tank to verify the result of simulation. The result of FE analysis and experiment is -126 dB re rad/$\mu$ Pa and -128 dB re rad/$\mu$ Pa respectively.

• Journal of the Korean Magnetics Society
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• v.10 no.2
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• pp.93-98
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• 2000

Drive line shape for reflective magneto-optic spatial light modulator has been designed by computer simulation. A factor of 3 improvement in pixel switching sensitivity and power consumption, compared to the conventional reflective magneto-optic spatial light modulator, has been achieved by the use of wedge-shape drive line and a soft magnetic layer. A factor of 2 higher optical efficiency and a factor of 2 simpler fabrication process have been achieved by the use of drive lines that covers most of the surface of pixel and unpatterned insulator.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.37 no.8
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• pp.789-797
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• 2009

Gyroscope's deadzone is a region where can not detect the rate even though the actual rotation is applied. This paper analyzed the cause of deadzone by modeling/simulation and introduced pulse dithering method to overcome. From the testing of 3-axis fiber optic gyro system using 900m fiber, it confirmed deadzone could be effectively eliminated by combination of three factors, dither amplitude, dither frequency, and gyro loop gain.

• Korean Journal of Optics and Photonics
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• v.5 no.4
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• pp.493-498
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• 1994

A fiber-optic matched filter with Cr/ Au film-deposited fiber-optic delay lines is fabricated for a possible application as photonic packet address detectors for an all-optical slotted ring network. Correlation waveforms for a set of 6-bit address codes with 2.5 Gb/s are produced by simulation. It is shown that the measured correlation outputs agree well with the calculated ones.d ones.