Measurements of dew droplets deposited on a metal plate by using an interference microscope with laser light

Shigeaki Matsumoto; Kinya Takayama; Satoru Toyooka

doi:10.1117/12.245177

19 July 1996 Measurements of dew droplets deposited on a metal plate by using an interference microscope with laser light

Shigeaki Matsumoto, Kinya Takayama, Satoru Toyooka

Author Affiliations +

Proceedings Volume 2861, Laser Interferometry VIII: Applications; (1996) https://doi.org/10.1117/12.245177
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

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.

Citation Download Citation

Shigeaki Matsumoto, Kinya Takayama, and Satoru Toyooka "Measurements of dew droplets deposited on a metal plate by using an interference microscope with laser light", Proc. SPIE 2861, Laser Interferometry VIII: Applications, (19 July 1996); https://doi.org/10.1117/12.245177

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