T. Nakanishi   T. Miura   T. Masaeda   A. Yarai   
Acoust. Sci & Tech. 25(5) 340-346 2004年5月 [査読有り]
The relationships between the various shapes in a Buddhist temple bell and the corresponding acoustic characteristics are clarified mainly by Finite Element Method (FEM) analysis. First, we show that the cross-sectional shapes of the "komazume" (l...
PROCEEDINGS OF THE IEEE SENSORS 2004, VOLS 1-3 1265-1268 2004年 [査読有り]
This paper describes the performance of an optical fiber gas sensor based on thermal lens (TL) spectroscopy. This sensor features an optical absorption path whose length is extremely short compared with other optical spectroscopic techniques. A pr...
A Yarai   Y Okamoto   T Nakanishi   
REVIEW OF SCIENTIFIC INSTRUMENTS 74(1) 652-654 2003年1月 [査読有り]
A method to enhance the sensitivity of photothermal radiometry (PTR) measurement was proposed. This method features multireflection of a pumping laser beam on the inside of a liquid vessel. This is a new, effective, and extremely simple method for...