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ID 15756
JaLCDOI
Sort Key
6
フルテキストURL
著者
Koga, Ryuji Department of Electronics
Nagase, Satoru Department of Electronics
Kosaka, Megumi Department of Electronics
Sano, Hiroya Department of Electronics
抄録
Basic prohlems are discussed about a local, realtime and very sensitive air-pollution monitoring using a laser diode. The method employs the second derivative spectrometry replacing the incoherent light source and mechanical choppers in a traditional method with the laser diode and a newly developed electronic system. Etalon fringes at this system becomes the dominant noise source and its statistic and dynamical features are to be understood. Numerical examination was done for the optimal width of optical frequency modulation. A very fast measurement of weak absorption spectra became possible by the development of lock-in-amplifiers with finite integration time instead of a low-pass filter. Spectra of methane in 7.6 μm region and a time-dependent spectrum of the etaIon fringe are shown.
出版物タイトル
Memoirs of the School of Engineering, Okayama University
発行日
1980-11-29
15巻
1号
出版者
岡山大学工学部
出版者(別表記)
School of Engineering, Okayama University
開始ページ
47
終了ページ
60
ISSN
0475-0071
NCID
AA00733903
資料タイプ
紀要論文
OAI-PMH Set
岡山大学
言語
English
論文のバージョン
publisher
NAID
Eprints Journal Name
mfe