Optics: measuring and testing – Refraction testing
Patent
1990-12-19
1992-05-05
Rosenberger, Richard A.
Optics: measuring and testing
Refraction testing
356134, 356361, G01N 2145
Patent
active
051102080
ABSTRACT:
An apparatus and a method are disclosed for measuring the average density and relative volumes in an essentially transparent, dispersed two-phase fluid. A laser beam with a diameter no greater than 1% of the diameter of the bubbles, droplets, or particles of the dispersed phase is directed onto a diffraction grating. A single-order component of the diffracted beam is directed through the two-phase fluid and its refraction is measured. Preferably, the refracted beam exiting the fluid is incident upon a optical filter with linearly varing optical density and the intensity of the filtered beam is measured. The invention can be combined with other laser-based measurement systems, e.g., laser doppler anemometry.
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"Fundamentals of Optics", F. Jenkins and H. White, McGraw Hill, 1957, p. 258, (no month).
IBM Technical Disclosure Bulletin, 13 (1), 258, A. B. Nafarrate, Jun. 1970.
Rippel Robert R.
Sreepada Sastry R.
Constant Richard E.
Kosovich Judy K.
Moser William R.
Rosenberger Richard A.
The United States of America as represented by the United States
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