著者

布施 則一 福地 哲生 水野 麻弥 福永 香

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. A (ISSN:03854205)

巻号頁・発行日

vol.135, no.4, pp.241-246, 2015

被引用文献数

4

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Non-destructive, two-dimensional distribution measurement of rusting under opaque anticorrosion paint was carried out, using a terahertz camera, a quantum cascade laser, and a galvanic scanner. The measurement speed of the present method was found to be 11 times faster than the conventional raster scanning method based on time-domain spectroscopy. A signal to noise ratio exceeding 10² was confirmed for both systems, which enables detection of minor rusting.

著者

布施 則一 福地 哲生 水野 麻弥 福永 香

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌A(基礎・材料・共通部門誌) (ISSN:03854205)

巻号頁・発行日

vol.135, no.4, pp.241-246, 2015

被引用文献数

4

---

Non-destructive, two-dimensional distribution measurement of rusting under opaque anticorrosion paint was carried out, using a terahertz camera, a quantum cascade laser, and a galvanic scanner. The measurement speed of the present method was found to be 11 times faster than the conventional raster scanning method based on time-domain spectroscopy. A signal to noise ratio exceeding 10² was confirmed for both systems, which enables detection of minor rusting.

著者

福地 哲生 名雪 琢弥 根本 孝七 内野 喜一郎

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. C, 電子・情報・システム部門誌 = The transactions of the Institute of Electrical Engineers of Japan. C, A publication of Electronics, Information and System Society (ISSN:03854221)

巻号頁・発行日

vol.123, no.9, pp.1531-1536, 2003-09-01

被引用文献数

7 4

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An acousto-optic laser deflector was used as a shutter for high-speed imaging of laser interference fringes using an ordinary CCD camera. The exposure duration was set by the pulse width of the high frequency signal applied to the acousto-optic deflector. Changes in laser interference fringes due to an impulse discharge in air were obtained at an exposure duration of 4μs. By applying a sequence of high frequency signals with different frequency, the beam was deflected to four different angles at different times, allowing four interference images to be captured on a single video frame. This was used for time-resolved imaging of the interference fringe pattern.