• Optical Science and Technology
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• v.8 no.3
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• pp.18-25
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• 2004

왜 펨토초 적외선 분광법인가\ulcorner 분광학이란 빛과 물질의 상호작용을 이용하여 물질에 대한 정보를 얻어내는 학문이다. 평형상태에 있는 물질을 구성하는 분자의 성질을 얻어내기 위해서는 보통의 분광학이 이용되지만 변화하거나 움직이고 있는 분자의 특성을 밝혀내기 위해서는 시분해 분광법이 주로 사용된다. 분자의 변화를 수반하는 화학적 변화는 거시세계에서는 상상을 초월할 정도로 매우 빨리 일어난다. (중략)

• Proceedings of the Korean Society of Near Infrared Spectroscopy Conference
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• 2002.11a
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• pp.119-143
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• 2002

• ETRI Journal
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• v.13 no.2
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• pp.54-61
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• 1991

에피택시층의 두께는 푸리에변환적외선분광분석(FTIR)을 이용하여 간단하고 비파괴적으로 측정할 수 있음이 알려져 있다. 본고에서는 측정법의 기본적인 배경을 살펴보고 실제 시편의 측정결과를 제시하며 본 두께 측정법의 적용 가능성 및 문제점에 대해 논의한다.

• Proceedings of the Korean Society of Near Infrared Spectroscopy Conference
• /
• 2002.11a
• /
• pp.8-24
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• 2002

• Proceedings of the Korean Society of Near Infrared Spectroscopy Conference
• /
• 2002.11a
• /
• pp.75-96
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• 2002

• Elastomers and Composites
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• v.15 no.3
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• pp.213-216
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• 1980

• Rubber Technology
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• v.20 no.3
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• pp.171-183
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• 2019

• Proceedings of the KSEEG Conference
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• 2001.04a
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• pp.256-258
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• 2001

• Proceedings of the KSEEG Conference
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• 2002.04a
• /
• pp.341-343
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• 2002

• Transactions of the Korean Society of Mechanical Engineers B
• /
• v.27 no.3
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• pp.398-405
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• 2003

A fast response analyzer for measuring carbon dioxide concentration has been developed for transient characteristic and researches tested on internal combustion engine. The analyzer uses the well known NDIR(Non-Dispersive Infrared) method with miniaturized detection system, giving a time constant of approximately 30 microsecond, and sampling module consists of capillary tube. Since the transit time and the time constant of the sampling system depend on the sampling conditions, it is necessary to investigate the characteristics of sampling system before applied to exhaust gas measurement in engine. A unique method was designed to study the influence of the diameter of transfer sample line and operating conditions of the FRNDIR on transit time and time constant. A database of transit time and time constant was built up for different measured and simulated pressure conditions. The database can be used for correcting eventual $CO_2$ concentration measurement.