title: Two-dimensional imaging of water vapor by near-infrared laser absorption spectroscopy.
abstract: Both a flow of water vapor generated from a humidification device and stable water vapor at constant moisture were successfully visualized by near-infrared (NIR) laser absorption spectroscopy. Two different types of optical arrangement for two-dimensional (2D) imaging, i.e., one-wavelength reflection and two-wavelength transmission, were tested. A flow of water vapor within a wide view range was clearly visualized by the former, while low content of stable water vapor was quantitatively detected by the latter. It was demonstrated that a detection limit of 0.8 g.m(-3) was achieved by means of the 2D-NIR imaging system developed in the present study.
authors.affiliation: Division of Energy Science, EcoTopia Science Institute, Nagoya University, Nagoya 464-8603, Japan. smorita@nagoya-u.jp
authors.forename: Shigeaki
authors.initials: S
authors.lastname: Morita
authors.forename: Eiji
authors.initials: E
authors.lastname: Hattori
authors.forename: Kuniyuki
authors.initials: K
authors.lastname: Kitagawa