• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.42 no.11
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• pp.958-967
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• 2014

A hybrid method based on high-frequency asymptotic optics was developed in order to predict the RCS of flying vehicles for RCS reduction studies. In cavity return, the rays are assumed to bounce from the inlet cavity based on the laws of geometrical optics and to exit the cavity via the aperture. In other parts of a flying vehicle, the physical optics method is applied to compute the back-scattered field from the solid surface. The hybrid method was validated by considering simple models of sphere and sphere with cavity. In addition, RCS analysis of a flying vehicle was conducted using the new hybrid electromagnetic scattering method based on physical optics and geometrical optics theories.

• Journal of Korean Ophthalmic Optics Society
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• v.2 no.1
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• pp.97-101
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• 1997

We studied the Malus's law for two and three polarizers experimentally. It was satisfied for two polarizers such as ${\phi}=cos^2{\theta}$, for three polarizers such as ${\Phi}=\frac{1}{4}sin^22{\theta}$.

• Proceedings of the Korean Magnestics Society Conference
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• 2010.06a
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• pp.92-93
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• 2010

• Proceedings of the Optical Society of Korea Conference
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• 2000.02a
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• pp.68-68
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• 2000

In this paper a very brief review of historical development of optical science and technology in China is presented. More attention has been pain on Modem Optics, which developed since 1950s. The recent development of optical science and technology in following fields are introduced. 1. Optical engineering and instrumentation (tracking theodolites, high speed cameras, satellite laser ranging systems, satellite flying attitude control, cameras for remote sensing, astronomical optical instrument) 2. Applied optics (adaptive optics, optical metrology, infrared optics, optical processing, optical holography) 3. Laser science and technology (ultrashort pulse lasers, UV-X ray lasers, high power laser facilities and laser fusion, laser isotope separation) 4. Laser and nonlinear materials (rare earth elements doped laser glasses and crystals, tunable laser crystals, borate series and organic nonlinear crystals) 5. Optoelectronic science and technology (Optical communication, optical data storage, optical computing) The current situation and developing prospect of optical and optoelectronic industry in China are presented. Furthermore it points out that the optical industry could be developed vigorously only if products development capacity is enhanced and new products industrialization is heightened. The main research and education institutions in the optics field in China, as well as the Chinese Optical Society (COS) are introduced.

• Proceedings of the Optical Society of Korea Conference
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• 2006.07a
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• pp.503-504
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• 2006

• Proceedings of the Korean Nuclear Society Conference
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• 2004.10a
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• pp.1267-1268
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• 2004

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.10a
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• pp.1290-1294
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• 2004

Exposure System is used for printing a prescribed pattern on a printed board, a liquid crystal substrate or the like. In this paper we are trying to develop projection Optics Exposure System for manufacturing Color Filter of LCD Display. This paper explain the Projection Optics Design and Illumination Optics Design of Color Filter Exposure system.

• Journal of Korean Ophthalmic Optics Society
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• v.2 no.1
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• pp.45-54
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• 1997

We chose four typas of Huygenian, Ramsden, Kellner, Erfle, among the eyepieces frequently used for optical instruments. Then we calculatde their optical properties and investigated characters of each type by comparing them.

• Proceedings of the Korean Magnestics Society Conference
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• 2009.12a
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• pp.104-105
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• 2009

• Proceedings of the Korean Nuclear Society Conference
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• 2005.05a
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• pp.1044-1045
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• 2005