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Proceedings Paper

Measurements of dew droplets deposited on a metal plate by using an interference microscope with laser light
Author(s): Shigeaki Matsumoto; Kinya Takayama; Satoru Toyooka
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Paper Abstract

Small dew droplets, which deposited on the mirror surface of a copper plate, were measured by using an interference microscope to evaluate the quality of dew deposited on the mirror surface of the dew-point hygrometer. A He-Ne laser of 10 mW and an optical fiber cable of 3 mm in diameter and 120 cm in length were used as a light source and an optical guide to the microscope. The fiber cable was shaken slightly with an acoustic speaker to reduce speckle noise in the interference images. A shape of dew droplet deposited on the mirror surface of the copper plate was obtained from the interference fringes, and the mass thickness of dew droplets was also obtained by numerical calculation of the volumes of each dew droplet deposited and was of the order of 10-5 g/cm2. The deposition velocities of dew on the surface under slow wind velocity were also measured.

Paper Details

Date Published: 19 July 1996
PDF: 6 pages
Proc. SPIE 2861, Laser Interferometry VIII: Applications, (19 July 1996); doi: 10.1117/12.245177
Show Author Affiliations
Shigeaki Matsumoto, Polytechnic Univ. (Japan)
Kinya Takayama, Saitama Univ. (Japan)
Satoru Toyooka, Saitama Univ. (Japan)

Published in SPIE Proceedings Vol. 2861:
Laser Interferometry VIII: Applications
Ryszard J. Pryputniewicz; Gordon M. Brown; Werner P. O. Jueptner, Editor(s)

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