• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.13 no.1
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• pp.15-20
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• 1999

A spectrophotorreter using two-beam type integrating sphere is developed, and the measurerrent accuracy is analyzed. The efficiency of the integrating sphere is analyzed, and the relation between the efficiency and the total measurerrent error is found. Especially, the integrating sphere is fabricated on the basis of its characteristics according to its shape such as the sample port. The perfonnance of the developed spectrophotorreter is tested using a black and a white standard reflectance plate, and the measurerrent error of $\pm0.5%$ is obtained.tained.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.3 no.4
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• pp.16-22
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• 2010

In this paper, we evaluated the effect with respect to the light of 700-1,100 nm NIR(near infrared radiation) for spectrophotometer. Standard, red, yellow, green and blue color paper which was Munsell color paper were used for experiments. Our used light is incandescent lamp, fluorescent lamp, invert fluorescent lamp and combined lamp. Each color paper was measured 20 times. Therefore we concluded that it is possible to build a spectrophotometer for NIR(near infrared radiation) measurement we applied an spectrophotometer to measurement system in incandescent lamp.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.11 no.4
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• pp.51-58
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• 1997

I배열형 광다이오드인 EG&G Reticon을 사용하여 측정시간이 약 10[ms]인 광측정용 초고속 분광광도계를 제작하였다. 핵심 부품인 배열형 광다이오드의 물리적 특성인 화소의 균일성, 선형성, 분광감응도를 측정하였다. 화소의 균일성과 선형성은 각각 0.5[%] 이내에서 일치하였으며, 분광감응도는 400[nm]에서 900[nm]까지 표준검출기를 사용하여 구하였다. 제작된 분광광도계는 2[nm]의 대역폭으로 측정이 가능하며 측정불확도는 2[%] 정도였다. 성능평가를 위해 미표준국의 표준기준물인 2009 didymium 필터와 수은 선광원을 측정한 결과 양호한 값을 얻었다.

• Journal of Bio-Environment Control
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• v.9 no.4
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• pp.223-229
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• 2000

This study was conducted to analyze the opto-electric characteristics of light-emitting diodes(LED) designed for growth and morphogenesis control of transplant and to quantify the photon flux emittig from LED using a quantum sensor spectroradiometer. Difference in photon flux for blue and red LED between measured by a quantum sensor and measured by a spectroradiometer and numerically integrated was not observed. This result implies a spectroradiometer can be applied to quantify the photon flux emitting from far-red LED, which can not be measured using a quantum sensor. Since photon flux increases in proportion to wavelength, photon flux of LED modules arranged for red and far-red increased in proportion to wavelength, photon flux of LED modules arranged for red and rar-red increased gradually as the number of LED stick emitting far-red in LEd modules increased. Illumination of LED modules arranged for red and far-red decreased as the number of LED stick emitting far-red in LED modules increased. There was no difference in irradiance between LED modules arranged for red and far-red.

• 월간산업보건
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• s.87
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• pp.23-32
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• 1995

• Applied Biological Chemistry
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• v.48 no.2
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• pp.183-188
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• 2005

This study was conducted to develop a method for the quantitative determination of soil clay content by spectophotometry. The optimum wavelength obtained with reference clay minerals for spectrophotometry was 500 nm. For the proposed spectrophotometry, 0.5 g of soil sample was put in the 250 ml Erlenmeyer flask and 100 ml dispersing agent was added. After shaking the flask at 130 rpm with a mechanical shaker overnight, the flask was removed from the shaker and was shaken up-and-down for 30 seconds. With a micro-pipet, 4 ml of the suspension was transferred into the previously-inserted cell and the absorbance was measured instantly. Results by the spectrophotometry for clay content analysis were compared with those by the conventional sedimentation technique (the pipet method). The proposed equation was $y\;=\;38.03x_1-0.17x_2-1.17$, where y, $x_1$, and $x_2$ were clay content (%) by the pipet method, water content corrected clay content (%) by spectrophotometry, and organic matter content ($g{\cdot}kg^{-1}$), respectively. The regression coefficient for the equation was $r\;=\;0.984^{**}$, indicating highly significant correlation between the results of the two methods.

• The Journal of the Korea Contents Association
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• v.12 no.6
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• pp.32-40
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• 2012

This study is a case analysis for user interface(UI) design of spectrophotometer which is widely used in the field of chemistry, biology and environment, based on user experience(UX). Generally, experimental equipment developments are centered on functionality and technology, and the interface for interaction between the user and the machine is developed only by the engineers who do not have much consideration for the users. From this background, this study tried to find out how UX could melt into UI so that a kind of spectrophotometers can be designed to help the work process of researchers in the real context by examining and analyzing the real users' experiences and also considering the developer's perspective. As a result, it was possible to improve UI and was found that redefinition of the goal of UI, time-efficiency, security, and sufficient information delivery are essential to the design of user interface for spectrophotometers.

• Applied Biological Chemistry
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• v.49 no.2
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• pp.153-157
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• 2006

Accuracy and precision of the spectrophotometeric analysis of clay content in soils were estimated by comparison with the conventional pipet method. Clay contents in 25 soil samples of various physico-chemical properties including texture were determined by spectrophotometry and pipet methods, and the two sets of data an clay content were compared by several statistical analyses. The correlation between clay contents determined by spectrophotometry and pipet methods was highly significant. The regression coefficient was $0.98^{**}$ and the slope of regression equation was close to 1.0. The standard deviation and CV of clay contents measured by spectorphotometry were smaller than those found in the data of clay contents obtained by pipet method. In conclusion, compared to the conventional pipet method, spectrophotometry was a rapid, convenient, accurate and precise method for the measurement of clay content in soils.

• 프린팅코리아
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• s.23
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• pp.42-51
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• 2004

농도계와 분광광도계 등 색상을 디지털화해 표현해 줄 수 있는 측색 장비의 수요가 늘고 있다. 이러한 변화는 갈수록 까다로워지는 고객의 요구에 대한 인쇄회사의 대응으로 고객과의 대화에 있어 감각이 아닌 쌍방향 정확한 정보 교환이 가능한 수치로 이야기하게 되었다는 점에서 큰 의미가 있다. 고품질 인쇄에 대한 욕구도 늘어나고 있는 CTP 출력과 비슷한 증가추세를 보이고 있는 인쇄 및 출력회사에서의 측색장비 사용 빈도수는 고객의 요구, 그리고 인쇄회사 스스로의 생존을 위해 향후 그 사용 빈도수가 점차 늘어날 것으로 보인다. 국내 인쇄업계의 명암을 확실하게 보여줄 농도계에 대해 알아보았다.

• 월간산업보건
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• s.91
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• pp.12-16
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• 1995