• 복식문화연구
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• 제11권6호
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• pp.967-971
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• 2003

As the concerns over health increased in 1990's, research and development on the health material were also activated. The development of UV-cut textile became the hot issue, because the damage of W irradiation due to ozone depletion has become widely known. UV-cut effect is determined by the material, the color, the organization and the density of UV-cut fibers. UV-cut effect is very different according to the fibers. Polyester is known to have a better effect. Even in the same textile material, staple fiber has more effect than filament fiber. Different colors have different offsets. Although textiles have the same color, the effects can be different according to the depth of color. PET, PET/cotton blend, nylon and cotton fabrics were ultraviolet cutting finished with padding method using several absorbers. These UV-cut effect can be improved through the processing. Safety of UV-cut textile for the body must be considered future, Until now the figure of the UV-cut effects has been emphasized. There has been no experiment on the human body, although the textiles are directly on the human body. Futhermore there os no safety standard of UV-cut textiles. Therefore every effort will be made to set the standard UV-cut processing is established. The need of UV-cut products will be known to the consumers.

• 한국안광학회지
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• 제6권1호
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• pp.107-110
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• 2001

렌즈에서 UV-A선의 차단효율을 평가하기 위해 320~400nm 영역에서 광 투과율을 측정하였다. 기준 CR-39와 sample을 320~400nm 영역에서 광 투과율을 적분하여 면적을 구하였으며, 이들의 면적 대비로 UV-A 차단효율 factor ${\alpha}$, ${\beta}$를 설정하였다. CR-39 렌즈의 질대 차단효율 ${\alpha}$ CR=0.59 값을 얻었다. UV-A 차단효과를 평가할 렌즈의 절대차단효율 ${\alpha}$ 값이면 상대차단효율 ${\beta}$ 값은 $1.69{\alpha}$ 값을 얻었다. 절대적 및 상대적 UV 제거 지수는 각각 $a=(1-{\alpha}){\times}100%$, $b=(1-{\beta}){\times}100%$을 이용하여 얻었다.

• 한국안광학회지
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• 제7권2호
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• pp.129-134
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• 2002

무코팅 CR-39 안경렌즈를 brown, green, blue 계열의 색으로 시간별로 착색하여 착색농도에 따른 UV차단효과를 관찰하였다. CR-39 안경렌즈의 착색농도에 따른 UV 스펙트럼은 먼저 분광광도계(spectrophotometer)로 분석하였고, 그 후 시중에서 많이 사용하는 400nm UV 차단 측정기의 투과수치와 비교하였다. 그 결과 착색 농도가 짙어짐에 따라 UV 차단 효과가 점점 증가하였고, 분광광도계의 UV 스펙트럼에서 400nm 기준 UV 투과률이 약 5% 미만의 경우에는 시중에서 많이 사용하는 400nm UV 차단 측정기의 투과수치에서는 0%로 됨을 확인했다.

• 한국염색가공학회지
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• 제14권4호
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• pp.223-228
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• 2002

Cotton fabric was treated with $TiO_2$-PEG600 dispersion colloid by pad-dry-cure and wet-fixation process to improve the performance properties as well as UV-cut effect. As the concentration of $TiO_2$/PEG increased tensile strength, crease resistance, stiffness of treated cotton fabric increased. Application of wet-fixation method provided a further improvement in tensile strength, crease resistance, stiffness of treated cotton fabric. Cotton fabric treated with $TiO_2$/PEG was more efficient in UV-cut property than untreated cotton.

• 한국의류학회지
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• 제25권5호
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• pp.925-932
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• 2001

The influence of ultraviolet(UV)-ray in sun light on human skin has been noted. Textiles can provide protection against harmful UV-radiation. Normally UV-absorbing finishes are used to get better protection. The purpose of this study is to evaluate the UV-cut properties of cotton fabrics treated with UV-absorber. 2,2-dihydroxy-4,4-dimethoxbenzophenone, as UV-absorber was applied to 100% cotton fabric. Reagents added in finishing solution were Triton X-100, polyethylene glycol 400, and $MgCl_2{\cdot}6H_2O$, and C.I. Direct Red 81. Both untreated and treated cotton fabrics were exposed to a xenon arc lamp for 20 and 80 hours. UV absorption spectra of finishing solutions and UV transmission spectra of fabrics were measured by the UV/VIS spectrophotometer. The results of this study can be summarized as follows. The results of this study can be summarized as follows. Absorption and the related transmission spectra were modified in a controlled way with UV-absorber. Absorption effect of UV-absorber was improved by adding Triton X-100, PEG 400, and $MgCl_2{\cdot}6H_2O$ in finishing solution. The UV absorption of finishing solution was in the following order: U/D/T/P/M>D/T/P/M> D/T> D/P, D>U/T/P/M>U/T>T/P/M>T. The UV transmittance of cotton fabrics was remarkably decreased by the application of UV-absorber and additives. The UV-cut properties were most improved by the application of U/D/T/P/M.

• 한국콘텐츠학회논문지
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• 제11권5호
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• pp.205-215
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• 2011

분광특성의 차이로 필름은 자외선에 민감한데 반해 디지털 카메라의 센서는 적외선에 굉장히 민감하다. 이에 따라 CCD 또는 CMOS를 사용하는 모든 디지털 카메라에는 IR Cut-Off Filter가 센서전면에 장착되어 있다. 이상적으로 100% 적외선을 차단하여야 하지만 실험 결과 완전히 적외선을 차단하지 못하고 있었으며, 각 카메라마다 적외선 투과량 또한 달랐다. 따라서 본 연구는 디지털 카메라에 장착되어 있는 IR Cut-Off Filter의 기계적 특성에 의해 투과되는 미량의 적외선이 디지털 화상이미지에 끼치는 영향을 분석하는 데 그 목적이 있다. UV필터를 장착한 상태(적외선 투과상태)와 UV-IR필터를 장착한 상태(적외선미투과상태)를 비교분석한 결과, 잡음(Noise)과 색 재현력 평가에서는 그 차이가 미세하거나 거의 동등한 수준이지만, 동적 폭(Dynamic Range)과 해상도에는 IR Cut-Off Filter를 통해 투과되는 미량의 적외선이 어느 정도 영향이 있음을 확인할 수 있었다.

• 한국안광학회지
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• 제6권2호
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• pp.17-21
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• 2001

렌즈에서 UV-A 선 차단 효율을 평가하기 위해 투과율에 의한 가시광 영역 luminance와 luminance에 의한 동공크기를 분석하였다. Luminance(L)에 따른 동공크기(${\Phi}$)는 ${\Phi}=d-e{\cdot}tanh(f{\cdot}logL)$로 주어지고, 동공 크기 (r)에 따른 투과효율은 $T_r(r)=1-gr^2+hr^4$으로 주어진다. $320{\sim}400nm$ 파장 영역인 UV-A에 대한 절대 차단 효율 ${\alpha}$와 제거 지수 $b=(1-{\alpha}){\times}100%$의 식을 유도하였다. UV-cut Lens, CR-39, red color 및 blue color 렌즈에 대한 ${\alpha}$ 값은 각각 0.018, 0.31, 0.273 및 0.153을 얻었고, b값은 각각 98, 69, 72 및 85%을 얻었다.

• 한국해양바이오학회지
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• 제7권2호
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• pp.52-57
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• 2015

The purpose of this study was to investigate a relationship between ultraviolet radiation and initial cell density (ICD) of microalgae using a floating marine photobioreactor (PBR). To examine the effect of ultraviolet (UV) radiation in sunlight on biomass productivity as a function of ICD, 0.5-L floating PBRs covered with or without UV cut-off film were placed in an outdoor rectangular tank containing 200 L of water. At the lower ICDs, 0.01 and 0.05 g/L, biomass productivities in the PBRs without UV cut-off film decreased by $278{\pm}21%$ and $222{\pm}3%$ compared with those with the film, respectively. In contrast, the presence of UV cut-off film did not have a significant effect on biomass productivities at the higher ICDs, 0.25 and 1.25 g/L. When the differences in biomass productivity made by the UV cut-off film were plotted against the sum of cell projection area per light receiving area of the PBR, the results revealed that the inhibitory effect of UV on biomass productivity can be negligible when the sum of cell projection area is equal to the light receiving area of the PBR. These results show that photoinhibition caused by UV radiation could be eliminated via operating the PBR with a proper ICD.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2010년도 춘계학술발표논문집 2부
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• pp.1112-1114
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• 2010

대기 영역을 통과한 UV는 인간과 자연 환경 및 재료 등의 합성 물질에 대해 심각한 피해를 유발할 수 있다. 폭발과 산처리된 나노 다이아몬드 표면의 곁가지 결합인 $Sp^2$ 결합체 내의 알킬기에 의한 광흡수 및 산란으로 UV을 차단할 수 있다. 본 연구에서는 폭발 및 산처리 다이아몬드와 나노급 흑연의 농도, 조성에 따른 수용성 현탁액에 의한 차외선 차단 효과를 조사하였다.

• 한국의류산업학회지
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• 제12권5호
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• pp.667-675
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• 2010

This research did chistosan and cation treatment to raise K/S vlue. In this result, chitosan 1%, cation 4% treatment showed the highest K/S value. Gilycyrrhizae radix dyeing showed the highest K/S value in pH3, pre-mordant, $30^{\circ}C$, 80 min.. Its color Y, YR. K/S value over 2.5 times showed in chitosan treatment fabrics, 5 times in cation treatment fabrics than cotton fabrics on the condition of none-mordant ones. In the antibacterial activity, staphylococus showed 99.9% in all fabrics. Klebsilla Pneumonia also showed 97.1% in chitosan treatment fabrics and it showed 99.9% in other all fabrics. In the deodorization and UV-cut effect, the more K/S value and the larger effect was showed.