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LIF를 이용한 Hg-Ar(1Torr)의 플라즈마 밀도 측정
양종경,이종찬,박대희 대한전기학회 2005 전기학회논문지C Vol.54 No.5(C)
In this paper, we introduced a LIF measurement method and summarized the theoretical side. When analtered wavelength of laser and electric power, lamp applied electric power, we measured the relative density of themetastable state in mercury after observing a laser induced fluorescence signal of 404.8nm and 546.2nm, and confirmed the horizontal distribution of plasma density in the discharge lamp. Due to this generation, the extinction of atoms in a metastable state occurred through collision, ionization, and excitation between plasma particles. The density and distribution of the metastable state depended on the energy and density of plasma particles, intensely. This highlights the importance of measuring density distribution in plasma electric discharge mechanism study. The results confirmed the resonance phenomenon regarding the energy level of atoms along a wavelength change, and also confirmed that the largest fluorescent signal in 436nm, and that the density of atoms in 546.2nm (63S1 → 63P2) were larger than 404.8nm (63S1 → 63P1). According to the increase of lamp applied electric power, plasma density increased, too. When increased with laser electric power, the LIF signal reached a saturation state in more than 2.6mJ. When partial plasma density distribution along a horizontal axis was measured using the laser induced fluorescence method, the density decreased by recombination away from the center.
양종경,백광현,이종찬,박대희,윤양웅,Yang, Jong-Kyung,Pack, Gewnag-Hyeon,Lee, Jong-Chan,Park, Dae-Hee,Yoon, Yang-Woung 한국전기전자재료학회 2005 전기전자재료학회논문지 Vol.18 No.8
In this paper, we designed the cylindrical type light source that had a electromagnetic principle of inductively coupled plasma, and measured its electrical-optical properties. Using the principle of transformer, electrically equivalent circuit of cylindrical type light source was analyzed. According to the parameters of electromagnetic induction which were diameter of coil with $0.3\~1.2\;mm{\Phi}$, number of turns with $4\~12$ turns, distance with $40\~120$ mm and RF power with $10\~150$ W, the electrical and optical properties were measured. When diameter of coil was $0.3\;mm{\Phi}$, number of turns was 8 turns and distance was 40 mm, the highest brightness of 29,730 $cd/m^2$ was shown with RF power 150 W. The relationship between electromagnetic induction and plasma discharges was shown by mode transition from E-mode to H-mode.
둥근형 무전극 램프의 페라이트 코어와 냉점의 온도 의존성
장혁진,양종경,김남군,정영일,박대희,Jang, Hyeok-Jin,Yang, Jong-Kyung,Kim, Nam-Goon,Jung, Young-Il,Park, Dae-Hee 한국전기전자재료학회 2009 전기전자재료학회논문지 Vol.22 No.12
Generally Lighting system consists of lamp and luminaire. When a fluorescent lamp is installed in luminaire, power and light output is changed by ambient temperature. Particularly electrodeless lamp depends on the changes that are mercury pressure with amalgam temperature and magnetic properties with ferrite temperature. It has finally influence on optical efficiency. In this study, the temperature change of ferrite and cold spot, vessel are measured at transitional state and then same characteristics are measured with increase of ambient temperature. At transitional state, luminous flux is related to temperature change of cold spot that compare with behavior of mercury pressure and light output. At increase of ambient temperature, we analyzed change that efficiency and electrical, optical characteristics of elecrodeless lamp are related to ferrite core and cold spot temperature.
100 W급 LED 보안 등기구용 비대칭 배광의 2차 렌즈 설계
신익태,양종경,이동진,박대희,Shin, Ik-Tae,Yang, Jong-Kyung,Lee, Dong-Jin,Par, Dae-Hee 한국전기전자재료학회 2010 전기전자재료학회논문지 Vol.23 No.6
This paper has studied dissymmetrical light distribution design using the secondary optics in the simulation. fundamental Lambertian radiation distribution based on LED has been cut off by the secondary optics, and the first surface slope of lens and second surface slope of total reflection area have been calculated through formula. PMMA (the index of refraction: 1.49361) which is material of lens has been selected. critical angle($42.02993^{\circ}$) between Air and PMMA has been calulated by snell's law, and total reflection angle slope has been selected about $16.67^{\circ}$ to occur the total reflection. when the first surface slope and the second surface slope has been set up, Rays of all total reflection area have generated the total reflection. finally, designed LED Module has been estimated by Korean Industrial Standards for LED safety street lighting. dissymmetrical light distribution have been analyzed with reached effect of road illuminance, and average road illuminance which are each 70.6 lx, 40.35 lx, and 25.88 lx have been satisfied with Korean Industrial Standards for LED safety street lighting.
무전극 형광램프용 페라이트에 따른 전기적 및 광학적 특성
백광현,양종경,이종찬,박대희,Pack Kwang-Hyeon,Yang Jong-Kyung,Lee Jong-Chan,Park Dae-Hee 한국전기전자재료학회 2006 전기전자재료학회논문지 Vol.19 No.2
An electric power efficiency of electrodeless fluorescent lamp depens on a big relative property of gas, gas pressure, lamp formation, ingredients of magnetic substance and shape and action frequency etc. in lamp. We used magnetic substance that opens self-examination material of electrodeless fluorescent lamp antenna. We used Mn-Zn type as the Ferrite. We have examined resistance, impedance and Q-factor's frequency characteristic by ferrite. Coil turns were changed from 13 to 15 turns to recognize brightness change of lamp by winding number. Optical equipment (LS-100) was used to measure brightness. We could know Q-factor's difference according to material is important part of antenna design. When an electrodeless fluorescent lamp was made using T company's PE22, it showed the highest brightness. As number of winding is increased the brightness increased, and starting characteristic became good.