Method of measuring viscosity of a body

Details Method of measuring viscosity of a body Method of measuring viscosity of a body

1987-11-18

1989-05-16

Yasich, Daniel M.

Thermal measuring and testing

Thermal testing of a nonthermal quantity

Of fluid volume

G01N 1102, G01N 2502

Patent

active

048305120

ABSTRACT:
The method of measuring viscosity of a glass body, such as an optical preform related to at least its softening temperature, exploits the scattering effects the body introduces into a substantially monochromatic radiation passing through it; more particularly, the width of the spectral line due to Brillouin scattering is measured. The temperature of the body can also be determined by measuring the width of the line generated by Rayleigh scattering. The method is of particular interest for measurements on glasses.

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patent: 4396290 (1983-08-01), Morris
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patent: 4724316 (1988-02-01), Morton
patent: 4767219 (1988-08-01), Bibby
"Laser Techniques (Thermal, Optical)", Ultrasonci Testing, by L. Szilard, TA 417.4 4.4, 1982 (pp. 190-191, 402-407) 374-117 (Sep. 65).
GB 2140 554 UK Patent Application, 11/28/84, (1984), D. P. Dakin, 5 pages.

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