• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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• pp.1330-1333
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• 2006

The channel shape of FFL(Flat Fluorescent Lamp) was designed by optical simulation. It was possible to design and manufacture the channel in any shape using glass forming. The best suitable brightness uniformity of 83.7% was achieved.

• Proceedings of the Optical Society of Korea Conference
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• 한국광학회 2004년도 하계학술발표회
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• pp.134-135
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• 2004

• Proceedings of the Optical Society of Korea Conference
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• 한국광학회 2007년도 하계학술발표회 논문집
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• pp.105-106
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• 2007

• The Optical Journal
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• 통권87호
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• pp.22-27
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• 2003

일본에서 먼저 100만화소급 이상의 모바일용 카메라모듈이 상품화되면서 우리나라도 그 뒤를 따르고 있는 가운데 렌즈에 있어서는 현재 Plastic lens와 연마 Glass lens로 국내에서는 대응하고 있지만 품질과 수량을 맞추기 위해 프레스 몰딩 Glass의 개발능력과 생산능력을 조속히 키우는 것이 시급하다. 또한 모바일용 카메라 모듈은 품질도 중요하지만 무엇보다 중요한 것은 생산능력, 제품의 균일성과 가격이다. 이를 위해 packaging공정은 현재

• Proceedings of the Optical Society of Korea Conference
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• 한국광학회 2005년도 하계학술발표회
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• pp.274-275
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• 2005

• Proceedings of the Optical Society of Korea Conference
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• 한국광학회 2005년도 하계학술발표회
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• pp.282-283
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• 2005

• Proceedings of the Optical Society of Korea Conference
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• 한국광학회 2008년도 하계학술발표회 논문집
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• pp.237-238
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• 2008

• Journal of the Korean Ceramic Society
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• 제40권11호
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• pp.1078-1084
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• 2003

In order to develop a new type of nonlinear optical materials or photocatlaysts, Na$_2$O-Nb$_2$ $O_{5}$-Te $O_2$ glasses were prepared using conventional melt quenching method, and the crystallization behaviors and optical properties of these glasses was investigated. The optical and physical properties for Na$_2$O-Nb$_2$ $O_{5}$-Te $O_2$ glasses are: refractive index, n=2.04$\pm$0.04; density, p (g/㎤)=4.87$\pm$0.58; optical energy band of the transmission cut-off wavelength, E$_{0}$ (eV)=3.14$\pm$0.04. The transparent glass ceramics consisting of the nanocrysatls were obtained when the Na$_2$O-Nb$_2$ $O_{5}$-Te $O_2$ glass was first heat-treated at 3$50^{\circ}C$ for 1 h and than at 40$0^{\circ}C$ for 1 h. A cubic crystalline phase consisting of the nano-crysatls transforms into a stable phase at temperature above 47$0^{\circ}C$ for 1 h.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• 제31권5호
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• pp.324-329
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• 2018

Red phosphor in glasses (PiGs) for automotive light-emitting diode (LED) applications were fabricated with 620-nm $CaAlSiN_3:Eu^{2+}$ phosphor and Pb-free silicate glass. PiGs were synthesized and mounted on high-power blue LED to make a monochromatic red LED. PiGs were simple mixtures of red phosphor and transparent glass powder. After being fabricated with uniaxial press and CIP at 300 MPa for 20 min, the green bodies were thermally treated at $550^{\circ}C$ for 30 min to produce high dense PiGs. As the phosphor content increased, the density of the sintered body decreased and PiGs containing 30% phosphor had a full sintered density. Changes in photoluminescence spectra and color coordination were studied by varying the thickness of plates that were mounted after optical polishing. As a result of the optical spectrum and color coordinates, PiG plate with $210{\mu}m$ thickness showed a color purity of 99.7%. In order to evaluate the thermal stability, the thermal quenching characteristics were measured at temperatures of $30{\sim}150^{\circ}C$. The results showed that the red PIG plates were 30% more thermally stable compared to the AlGaInP red chip.

• Nuclear Engineering and Technology
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• 제56권1호
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• pp.247-256
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• 2024

The glass series modified by tungsten oxide was created using the compounds (75-x) B₂O₃- 10SrCO₃- 8TeO₂- 7ZnO - xWO₃, where x = 0, 1, 5, 10, 22, 27, 34, and 40% mole percentage. A UV-visible spectrophotometer and thermogravimetric-differential thermal analysis (TG-DTA) methods were employed to characterize the specimen's optical and phase transition attributes, respectively. The mass-attenuation coefficient (AC) of all created glasses from BSTZW0 to BSTZ7 was estimated using Geant4 code from 0.05 to 3 MeV and compared to the XCOM software results, with a relative difference of less than 2% between the two results. The increase of WO₃ percentage lead to an increase in the Linear-AC at each studied energy, and this is mainly due to the fact that the higher the percentage of WO₃ in the glass increases its density which causes an increase in the Linear-AC, so an energy of 0.06 MeV, as an example, the values of the Linear-AC was 4.009, 4.509, 5.442, 6812, 8.564, 9.856, 10.999 and 11.628 cm^-1 form BSTZW0 too BSTZW7, respectively. The Half-VL (value layer), Mean-FP (free path), Tenth-VL, and Radiation attenuation performance (RAP) were also calculated for the current BSTZW-glass samples and revealed that BSTZW7 had the best gamma ray attenuation performance at all discussed energies when compared to other studied glass samples.