Optics: measuring and testing – Refraction testing
Patent
1983-02-03
1986-02-11
Evans, F. L.
Optics: measuring and testing
Refraction testing
G01N 2141
Patent
active
045695903
ABSTRACT:
A system for determining the index of refraction of a sample fluid in which light from a collimated light source is directed through a light pervious cell in which sample and reference fluids are held. The light from the collimated light source which is transmitted through the cell is deflected and is then directed through a pair of gratings to establish patterns. When the cell contains a reference fluid therein, first patterns are established, and second patterns are then established by replacing the reference fluid with the sample fluid. A measurement of the change between the first patterns and the second patterns is used for determining the index of refraction of the sample fluid.
REFERENCES:
patent: 3612696 (1971-10-01), Broerman
Oster et al., Moire Patterns, Scientific American, May, 1963, pp. 54-64.
Yoshino et al., Doubling and Visibility Enhancement of Moire Fringes of the Summation Type, Applied Optics, pp. 1124-1126, vol. 15, No. 5, May, '76.
Moser et al., A Method for Measurement of the Refracting Index of Liquids and Solids by the Moire Pattern Technique, Bull. Soc. Physicians Republ. Socialiste Macedoine, (Yugoslavia) vol. 27, 1977, pp. 55-65.
Kafri Oded
Karny Ziv
Keren Eliezer
Evans F. L.
The State of Israel, Atomic Energy Commission
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